The sampling process used by the school newspaper is convenience sampling.
Convenience sampling is the most popular kind of sampling that concentrates on gathering data from individuals (the sample) who are 'convenient' for the researcher to reach. With this sample strategy, researchers can choose subjects at random who are receptive to being contacted and participating in the study rather than selecting participants at random based on any set of criteria (such as demographic variables). This implies that one can locate your sample at any time and any place, such as among individuals in a mall, on the street, at work, or in an online community.
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consider a group of hundred students. out of them, eighty students can speak either english or spanish. suppose twenty-five students can speak only english. how many students can speak spanish?
the product of two consecutive integers is 272. which quadratic equation can be used to find x, the smaller number? x2 1
Quadratic equation which is x² + x - 272 = 0 can be used to find the product of two consecutive integers.
What is a quadratic equation?An algebraic equation of a second degree in x is a quadratic equation. The quadratic equation is written as ax² + bx + c = 0, where x is the variable, a and b are the coefficients, and c is the constant term.
Let one number be x,
second number will be - (x+1)
so, the product of two numbers will be -
x(x+1) = 272
x² + x = 272
x² + x - 272 = 0
The quadratic equation, used to find the numbers is x² + x - 272 = 0.
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Assignment
Find the midpoint of the line segment with the given endpoints
1) (7,2), (-7, -9)
PLEASE HELP V=1/3a^2h solve for h
Answer: h=3V/a^2
Step-by-step explanation:
V=1/3a^2h
V=1/3 * a^2 * h
V*3=3*1/3 * a^2 * h
3V=a^2 * h
h=3V/a^2
Members of a lacrosse team raised $1775-50 to go to a tournament. They rented a bus
for $901.50 and budgeted $46 per player for meals. Write and solve an equation
which can be used to determine x, the number of players the team can bring to the
tournament.
Considering the definition of an equation and the way to solve it, the equation is 901.5 + 46x= 1775.50 and the number of players the team can bring to the tournament is 19.
Definition of equationAn equation is the equality existing between two algebraic expressions connected through the equals sign in which one or more unknown values, called unknowns, appear.
The members of an equation are each of the expressions that appear on both sides of the equal sign while the terms of an equation are the addends that form the members of an equation.
The solution of a equation means determining the value that satisfies it and the equality must be true. To solve an equation, keep in mind:
When a value that is adding, when passing to the other member of the equation, it will subtract.If a value you are subtracting goes to the other side of the equation by adding.When a value you are dividing goes to another side of the equation, it will multiply whatever is on the other side.If a value is multiplying it passes to the other side of the equation, it will pass by dividing everything on the other side.This caseBeing "x" the number of players the team can bring to the tournament, and knowing that:
Members of a lacrosse team raised $1775.50 to go to a tournament. They rented a bus for $901.50 and budgeted $46 per player for meals.the equation in this case is:
901.5 + 46x= 1775.50
Solving:
46x= 1775.50 - 901.5
46x= 874
x= 874 ÷ 46
x=19
Finally, the equation is 901.5 + 46x= 1775.50 and the number of players the team can bring to the tournament is 19.
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each of the following three data sets represents the iq scores of a random sample of adults. iq scores are known to have a mean and median of 100. full data set sample of size 5 sample of size 12 sample of size 30 . . . question content area right part 1 for each data set, compute the mean and median. what is the mean of the sample of size 5? enter your response here (type an integer or decimal rounded to one decimal place as needed.)
All the above data were obtained by entering them in excel format and obtaining it using standard methods.
What is the standard deviation?A low standard deviation shows that the values tend to be close to the mean (also known as the expected value) of the set, whereas a high standard deviation suggests that the values are spread out over a wider range. The standard deviation is a measure of variance or dispersion in statistics. Standard deviation, often known as SD, is most frequently represented in mathematical texts and equations by the lowercase Greek letter (sigma), for the population standard deviation, or the Latin letter s, for the sample standard deviation.
For sample size 5, Mean = 117.6 and Standard Deviation = 9.2
For sample size 12, Mean = 103.5 and Standard Deviation = 8.6
For sample size 30, Mean =104.6 and Standard Deviation = 8.7
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How many three-digit numbers may be formed using elements from the set {1,2,3,4,5,6,7,8}. if no element may be used more than once in a number and the number must be even?
126 three-digit numbers may be formed using elements from the set {1,2,3,4,5,6,7,8}. if no element may be used more than once in a number and the number must be even
For given question,
We need to find number of three-digit numbers formed using elements from the set {1,2,3,4,5,6,7,8} if no element may be used more than once in a number and the number must be even.
3-digit even numbers are to be formed using the given six digits,1 ,2,3,4,6,7, and 8 without repeating the digits.
Then, units digits can be filled in 4 ways by any of the digits, 2,4, 6 or 8.
Since the digits cannot be repeated in the 3-digit numbers and units place is already occupied with a digit (which is even), the hundreds and tens place is to be filled by the remaining 7 digits.
So, the number of ways in which hundreds and tens place can be filled with the remaining 7 digits is the permutation of 7 different digits taken 2 at a time.
[tex]\Rightarrow ~^7P_2=\frac{7!}{(7-2)!} \\\\\Rightarrow ~^7P_2=42[/tex]
Thus, by multiplication principle, the required number of 3-digit numbers is 3 × 42 = 126
Therefore, 126 three-digit numbers may be formed using elements from the set {1,2,3,4,5,6,7,8}. if no element may be used more than once in a number and the number must be even
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If John's credit card has a balance of $1,329.64 balance and he charged $528.44 in new purchases, what
is the new balance?
Answer: 801.2
Step-by-step explanation:
with explanation needed. a and b
a)
Solution,
According to fuel gauge,the petrol left is exactly between 1/2 and 3/4 part of the 40 litres.
i.e. Left fuel = (1/2 + 3/4)/2 litres
Here,
1/2 of 40l = 1/2×40l
= 20l
3/4 of 40l = 3/4×40l
= 30l
Then,
Left fuel = (20l + 30l)/2
= 50l/2
= 25l
Consumed fuel = 40l - 25l
= 15l
Therefore,15 litres of petrol is used to travel 240km
b)
Solution,
Consumed fuel = 15l
Distance covered = 240km
Then,
Fuel consumption rate = 240km/15 l
= 16km/l
Therefore,the rate of petrol consumption is 16km/l of his car for this journey
. If the lesser of two consecutive even integers is five more than half the greater,
what are the two integers?
Answer:
12 and 14
Step-by-step explanation:
You want two consecutive even integers such that the lesser is five more than half the greater.
SetupLet x represent the lesser of the integers. Then x+2 is the greater, and we can write the given relation as ...
x = (x+2)/2 +5 . . . . . lesser is 5 more than half the greater
SolutionMultiplying by 2 gives ...
2x = x +2 +10
x = 12 . . . . . . . . subtract x
x+2 = 14
The two integers are 12 and 14.
Jen was the leading scorer on her soccer team. She scored 120 goals and had 20 assists in her high school career. a. The number of points awarded for goals is given by 2g where g is the number of goals scored. How many points did Jen earn for goals? b. The point total is given by n + a where a is the number of assists. Use your answer from part (a) to find Jen's point total. mirum
a. The number of points that Jen earned will be 240 points.
b. The point total where a is the number of assists is 260 points.
How to compute the function?The number of points that Jen earned will be:
= 2g
where g = number of goals scored
= 2 × 120
= 240
b. The point total is given by n + a where a is the number of assists.
Therefore, the point total will be:
= Goals + Assist
= 240 + 20
= 260 points.
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A 1,600 deposit for 15 years at a compound interest rate of 12%
Answer:
$8,758
I hope this helps!
4. (40 Pts) The Vacation Times website rates recreational vehicle campgrounds
using integers from 0 to 15. Last year they rated over 1,000 campsites. The
ratings were normally distributed with mean 7.6 and standard deviation 1.7.
a. How high would a campsite's rating have to be for it to be considered in
the top 10% of rated campsites? Round to the nearest hundredth.
b. Find the z-score for a rating of 5. Round to the nearest hundredth.
Using the normal distribution, it is found that:
a) The rating would have to be of at least 9.78.
b) The z-score for a rating of 5 is of -1.53.
Normal Probability DistributionThe z-score of a measure X of a normally distributed variable with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex] is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The z-score measures how many standard deviations the measure is above or below the mean. Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.The mean and the standard deviation are given by:
[tex]\mu = 7.6, \sigma = 1.7[/tex]
For item a, we have to find the 90th percentile, which is X when Z = 1.28, hence:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
1.28 = (X - 7.6)/1.7
X - 7.6 = 1.28 x 1.7
X = 9.78.
The rating would have to be of at least 9.78.
For item b, we have to find Z when X = 5, hence:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
Z = (5 - 7.6)/1.7
Z = -1.53.
The z-score for a rating of 5 is of -1.53.
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a phrase that describes a set of real numbers is given. express the phrase as an inequality involving an absolute value. all real numbers x more than 2 units from 0
The inequality will be - {x ∈ R: x > x+2} that describes a set of all real numbers x more than 2 units from 0.
What is an inequality?Relationships between two expressions that aren't equal to one another are known as inequalities. Inequalities are represented by the symbols <,>,=,etc.
What is an example of inequality?The equation-like form of the formula 5x - 4 > 2x + 3 has an arrowhead in lieu of the equals sign. It is an illustration of inequity. This shows that the left half, 5x - 4, is bigger than the right part, 2x + 3. Finding the x numbers for which the inequality holds true is what we are most interested in.
Given,
all real numbers x more than 2 units from 0
So, the inequality representing the the information will be -
{x ∈ R: x > x+2}
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What is this type of polynomial?
13x² + 17x +3
Answer:
This is a quadratic (second-degree) polynomial.
What is the approximate value of √8?
Answer:
the approximate value should be 2.83
Please help please I’m in desperate need
Answer:
ok I will help u don't worry
3/5evaluate the expression and name the poperty used in each step. [5/(3times1)] 3/5
Evaluate expression and Name the property used in each step.
= { [5/(3 times 1)] } 3/5
= {[5/(3.1)]} 3/5
We can write,
Multiplicate identity,
= [5/3] 3/5
Substitution,
= (5/3) (3/5)
Cancel the numerator and denominator values,
So,
We can write,
= 1 Multiplicative Inverse
Therefore,
3/5evaluate the expression and name the property used in each step. [5/(3times1)] 3/5 is = 1 Multiplicative Inverse.
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Please Help!! Find the sum. In your final answer, include your calculations.
−3.45 + 5.1
8.55
Here's a video that could explain
https://youtu.be/WwKLA-6S-e0
Also when doing the math ignore the - sign, the larger number will determine if the answer will be a whole or a minus , let me explain, so as you see in the question the 5.1 is the largest so that means the answer will be a whole.
how can you represent 0.721 without using hundredths?
0.721 can be written in scientific notation as 7.21 x [tex]10^{-1}[/tex]
What is scientific notation?Scientific notation is used to compress large numbers into smaller numbers. In order to write a number in scientific notation, the number is written as a decimal number, between 1 and 10 and multiplied by a power of 10.
For example:
1 x 10² is equivalent to 100
1 x [tex]10^{-1}[/tex] is equivalent to 0.1
To convert 0.721, multiply and raise 10 to the power of -1
by 10 = 7.21 x [tex]10^{-1}[/tex]
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Melinda has 5 cousins. She called each one on the phone 4 times this month. How many phone calls did she make to her cousins this month
Answer:20
Step-by-step explanation:5*4=20 hope this helps
18 12 over 7 minus 2
Answer: whats the answer choices
Step-by-step explanation: i dont get it
Answer:
1,798/7
Step-by-step explanation:
1812/7-2 (or it can be written as 14/1 because you getting rid of two sevenths)
what is the sum of x and 16 is less than 32?
Answer:
I don't know the exact question you're asking, but the solution for x would be x16.
[tex]3x+6=4x+7[/tex]
Charlotte is driving at 61.4 mi/h and receives a text message. she looks down at her phone and takes her eyes off the road for 3.93 s. how far has charlotte traveled in feet during this time?
The distance travelled by Charlotte in feet is 354 feet. This is obtained by using the concept of speed and distance on the given problem.
What is speed?
Speed is defined as the distance per unit of time. It is the numerical quantity that specifies how fast an object is moving. The basic unit of speed is given by m / s.
Calculation of the distance travelled by Charlotte in feet
Given:
Speed = 61.4 mi / h
Time = 3.93 s
The basic step to solve this problem is to convert miles per hour to feet per second
(61.4 mi / hr) * (5280 feet / mi) * (1 hr / 3600 sec) = 90.0533 feet / sec
Now, multiply the speed by the number of seconds to find the value of distance in feet
(90.0533 feet / sec) * (3.93 sec) = 353.909 feet.
Hence, the distance travelled by Charlotte in feet is 354 feet.
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which of these equations are shown on the graph?
The equation shown on the graph is y = 2x + 3. The correct answer is C. y = 2x +3
Equation of a lineFrom the question, we are to determine the equation that represent the given line
To determine the equation, we will pick two points on the line and determine the equation of the line
Picking the points (0, 3) and (3, 9)
Using the formula for the finding the equation of a line with two given points
(y - y₁)/(x - x₁) = (y₂ - y₁)/(x₂ - x₁)
x₁ = 0
y₁ = 3
x₂ = 3
y₂ = 9
Then,
(y - 3)/(x - 0) = (9 - 3)/(3 - 0)
(y - 3)/x= 6/3
(y - 3)/x= 2
y - 3 = 2x
y = 2x + 3
Hence, the equation shown on the graph is y = 2x + 3. The correct answer is C. y = 2x +3
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5 less than 10 times a number is 2 times than number plus 6
Group of answer choices
11/8
11
8
6
what is the problem 10.5-9.67
Answer:
0.83
Step-by-step explanation:
10.5-9.67 the answer is 0.83
Answer:The answer is 0.83
Step-by-step explanation:Please give brainliest if right.I hope this helps.
belinda received a 3+ points on a problem on a quiz what is the absolute value of the number of points she received
Answer:
3
Step-by-step explanation:
the absolute value is distance of a number from 0 so +3 absolute value is 0
The end points of ab are A (-7,3) and B (1,0) find the coordinates of the midpoint M.
Answer: M(-3,1.5)
Step-by-step explanation:
A(-7,3) B(1,0)
[tex]\displaystyle\\M(x,y)=(\frac{x_A+x_B}{2} ,\frac{y_A+y_B}{2} )\\\\M(x,y)=(\frac{-7+1}{2},\frac{3+0}{2} )\\\\M(x,y)=(\frac{-6}{2},\frac{3}{2} )\\\\M(x,y)=(-3,1.5)\\\\Thus,\\\\M(-3,1.5)[/tex]