Answer: Check this answer!
Step-by-step explanation:
The comparison of two independent population means is very common and provides a way to test the hypothesis that the two groups differ from each other. Is the night shift less productive than the day shift, are the rates of return from fixed asset investments different from those from common stock investments, and so on? An observed difference between two sample means depends on both the means and the sample standard deviations. Very different means can occur by chance if there is great variation among the individual samples. The test statistic will have to account for this fact. The test comparing two independent population means with unknown and possibly unequal population standard deviations is called the Aspin-Welch t-test.
In simple terms, The population standard deviation is a parameter, which is a fixed value calculated from every individual in the population. A sample standard deviation is a statistic. This means that it is calculated from only some of the individuals in a population. Since the sample standard deviation depends upon the sample, it has greater variability. Thus the standard deviation of the sample is greater than that of the population
Because: reason:
Since the sample standard deviation depends upon the sample, it has greater variability. Thus the standard deviation of the sample is greater than that of the population.
HOPE IT HELPS YOU, IF IT HELPS PLEASE MARK THE BRAINLIEST BECOZ IT TOOK ME QUITE WHILE TO WRITE TO YOU...
If there are two angles that are complementary, and the first angle has a measure of 18°, what is the measure of the second angle?
A. 180 degrees
B. 162 degrees
C. 72 degrees
Answer:
C. 72 degrees
Step-by-step explanation:
Complementary angles total 90 degrees.
The second angle is ...
90° - 18° = 72°
Find the exact trigonometric ratios for the angle x whose radian measure is given. (If an answer is undefined, enter UNDEFINED.) −7π
Answer:
sin(x) = tan(x) = 0
cos(x) = sec(x) = -1
cot(x) = csc(x) = UNDEFINED
Step-by-step explanation:
An angle of -7π is co-terminal with an angle of π (or 180°). Its trig ratios are ...
sin(x) = tan(x) = 0
cos(x) = sec(x) = -1
cot(x) = csc(x) = UNDEFINED
Rehan paid 560p for 7 pencils.if the price of each pencil was the same.work out the price of 4 such pencils
Answer:
320p
Step-by-step explanation:
According to the question,
560p = 7 pencils
Therefore,
1 pencil = 560 / 7
= 80p
So, for 4 pencils it costs
4 * 80 = 320p
Answer:
easy piizzy lemon squeezyy!!
Step-by-step explanation:
i) 560/7
=80
ii) 80*4
=320
a)250cm =______ mm.
b)5000m = ____ km.
c) 200km =______cm.
Answer:
a = 2500mm
b = 5km
c = 2e+7
Step-by-step explanation:
Answer:
a)
1cm = 10mm
250cm = 250*10 = 2500mm
b)
1km = 1000m
5000m = 5000/1000 = 5km
c)
1km = 1000m
1m = 100cm
1km = 1000*100 = 100000cm
200km = 200*100000 = 20000000cm
Express (2-I) - (-1+3i) in the form of a + ib.
Answer:
[tex]=3-4i[/tex]
Step-by-step explanation:
So we have:
[tex](2-i)-(-1+3i)[/tex]
First, distribute:
[tex]=(2-i)+1-3i[/tex]
Combine like terms:
[tex]=-i-3i+2+1[/tex]
Add:
[tex]=-4i+3[/tex]
So, in the a+bi format, we will have:
[tex]=3-4i[/tex]
Answer:
3 -4i
Step-by-step explanation:
(2-i) - (-1+3i)
Distribute the minus sign
(2-i) + 1-3i
Combine like terms
3 -4i
In a student survey, fifty-two part-time students were asked how many courses they were taking this term. The (incomplete) results are shown below: Please round your answer to 4 decimal places for the Relative Frequency if possible. # of Courses Frequency Relative Frequency Cumulative Frequency 1 20 Correct .3846 Correct 20 2 19 0.3654 39 Correct 3 13 0.25 52 What percent of students take exactly one courses? 51.61 Incorrect%
Answer:
The percentage of students taking exactly one courses is 38.46%.
Step-by-step explanation:
The frequency distribution table provided for the number of courses taken by part-time students is as follows:
# of Courses Frequency Relative Cumulative
Frequency Frequency
________________________________________________
1 20 0.3846 20
2 19 0.3654 39
3 13 0.2500 52
TOTAL 52 1.0000
The relative frequency is actually the probability or chance of the particular class or category of a frequency distribution.
The probability of students taking exactly one courses is 0.3846.
Then the percentage of students taking exactly one courses is:
0.3846 × 100% = 38.46%
Thus, the percentage of students taking exactly one courses is 38.46%.
how to answer arrange least to greatest
Answer:
Let's see it by an example!
The numbers are given:
5 , 77 , 23 ,45 & 0
Let's arrange this from least to greatest :
0<5<23<45<77
Note : This sign(<) means greater than.
Hope you understand!✔
Explore More:You can also practice this by greatest to least!
You can use this sign(>) [ it means less than ]
SMALL Example is given :
55>2
What is the image point of (2,6) after a translation right 5 units and down 3 units?
Answer:
(7, 3)
Step-by-step explanation:
(2+5, 6-3) = (7, 3)
(7a^3 -2a-2)+(-5a+3)
Answer:
7a 3 −7a+1
Step-by-step explanation: I hope this help.
STEP
1
:
Equation at the end of step 1
((7a3 - 2a) - 2) + (3 - 5a)
STEP
2
:
Polynomial Roots Calculator :
2.1 Find roots (zeroes) of : F(a) = 7a3-7a+1
Polynomial Roots Calculator is a set of methods aimed at finding values of a for which F(a)=0
Rational Roots Test is one of the above mentioned tools. It would only find Rational Roots that is numbers a which can be expressed as the quotient of two integers
The Rational Root Theorem states that if a polynomial zeroes for a rational number P/Q then P is a factor of the Trailing Constant and Q is a factor of the Leading Coefficient
In this case, the Leading Coefficient is 7 and the Trailing Constant is 1.
The factor(s) are:
of the Leading Coefficient : 1,7
of the Trailing Constant : 1
Let us test ....
P Q P/Q F(P/Q) Divisor
-1 1 -1.00 1.00
-1 7 -0.14 1.98
1 1 1.00 1.00
1 7 0.14 0.02
Polynomial Roots Calculator found no rational roots
Final result :
7a3 - 7a + 1
Answer:
[tex] \boxed{ \bold{ \huge{ \boxed{ \sf{7 {a}^{3} - 7a + 1}}}}}[/tex]
Step-by-step explanation:
[tex] \sf{(7 {a}^{3} - 2a - 2) + ( - 5a + 3) }[/tex]
When there is a ( + ) in front of an expression in parentheses, there is no need to change the sign of each term. That means, the expressions remains the same. Just, remove the parentheses
⇒[tex] \sf{7 {a}^{3} - 2a - 2 - 5a + 3}[/tex]
Collect like terms
⇒[tex] \sf{7 {a}^{3} - 2a - 5a - 2 + 3}[/tex]
⇒[tex] \sf{7 {a}^{3} - 7a - 2 + 3}[/tex]
Calculate
⇒[tex] \sf{7 {a}^{3} - 7a + 1}[/tex]
Hope I helped!
Best regards!!
144 = m - 98 m = pls help
Answer:
43
Step-by-step explanation:
The solution to the equation 144 = m - 98 is m = 242 as per the PEMDAS rule.
To solve for m in equation 144 = m - 98, we can follow these steps:
Start with the given equation: 144 = m - 98.
To isolate the variable m, we need to eliminate the -98 on the right side of the equation. We can do this by adding 98 to both sides of the equation:
144 + 98 = m - 98 + 98.
Simplifying the equation, we get: 242 = m.
Now we have m = 242 as the solution to the equation.
Therefore, m = 242 is the value that satisfies the equation 144 = m - 98. By substituting m with 242 in the equation, we can verify that it holds true:
144 = 242 - 98.
144 = 144.
To learn more about the equation;
https://brainly.com/question/12788590
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The complete question:
144 = m - 98
Solve for m
What is the base of the rate is 16.1% and the portion is 454
The rate is 16.1% and the base is the final portion with the rate added on to it.
Chance the percentage into a decimal.
16.1% / 100 = 0.161
Multiply.
454 * 0.161 = 73.094
Add.
454 + 73.094 = 527.094 or 527.09
Therefore, the final base is roughly 527.09
Best of Luck!
Adriana worked 38 hours last week. Her job pays $12 an hour. How much did she earn last week?
Multiply the hours by how much she makes per hour.
38 * 12 = $456
Therefore, she made $456 last week.
Best of Luck!
the surface area of a sphere whose radius is 0.5 cm is
Answer: The answer is 3.14 (also known as π)
Step-by-step explanation: The formula for the surface area of a sphere is:
A = 4πr^2
A = 4π (0.5)^2
A = 4π (0.25)
A = (4 x 0.25) π
A = 1π
A = π or A = 3.14
what is the relationship between integers and natural numbers.
solve the equation 6 over x + 1 over 2 equals to 2
Answer:
x = 4
Step-by-step explanation:
6/x + 1/2 = 2
x(6/x + 1/2) = 2*x
x*6/x + x*1/2 = 2x
6 + x/2 = 2x
6 = 2x - x/2
6 = 4x/2 - x/2
6 = 3x/2
6*2/3 = x
12/3 = x
x = 4
probe:
6/4 + 1/2 = 2
3/2 + 1/2 = 4/2
juan spent 10 min on his history homework and 3 min per question on his math homeowrk. which graph shows the total homework time t, related to the number of questions q
Answer:1st graph
Step-by-step explanation: did this question already
Answer: First option
Step-by-step explanation:
I did the lesson already
can someone please help me with this
Answer:
-21
Step-by-step explanation: a negative times a positive will always be a negative
Please help Please help
Answer:
Leg ED is adjacent to theta
(10x² +34
+ 34x+ 30) = (2x+4)
Answer:
2 = 0
This equation has no solution.
Step-by-step explanation:
A a non-zero constant never equals zero
how do I do this
plz help
Answer:
6
Step-by-step explanation:
Answer:
6
Step-by-step explanation:
Use order of operations.
42/(15-2^3)
Exponents in Parentesis
42/(15-8)
Subtraction inParenthesis
42/7
Division
6
What percentage of the data in a standard normal distribution lies between x = .09 and x = 1.2?
Answer:
The percentage is [tex]P(0.09 < \mu < 1.2 ) = 34.9\%[/tex]
Step-by-step explanation:
From the question we are told that
The random number is [tex]x_1 = 0.09 \ and \ x_2 = 1.2[/tex]
Generally the mean of standard normal distribution is [tex]\mu = 0[/tex]
The standard deviation of a standard normal distribution is [tex]\sigma = 1[/tex]
The percentage of the data in a standard normal distribution lies between
[tex]x_1 = 0.09 \ and \ x_2 = 1.2[/tex] is mathematically represented as
[tex]P(x_1 < \mu < x_2 ) = P(\frac{x_1 - \mu}{\sigma } <\frac{X - \mu}{\sigma } < \frac{x_2 - \mu}{\sigma } )[/tex]
[tex]P(0.09 < \mu < 1.2 ) = P(\frac{0.09 - 0}{1 } <\frac{X - \mu}{\sigma } < \frac{1.2 - 0}{1 } )[/tex]
[tex]P(0.09 < \mu < 1.2 ) = P(0.09 <\frac{X - \mu}{\sigma } < 1.2 )[/tex]
The [tex]\frac{X - \mu}{\sigma } = Z(The \ standardized \ value \ of \ X )[/tex]
[tex]P(0.09 < \mu < 1.2 ) = P(0.09 <Z < 1.2 )[/tex]
[tex]P(0.09 < \mu < 1.2 ) = P (Z < 1.2 )- P( Z<0.09)[/tex]
From the z-table
[tex]P (Z < 1.2 )= 0.88493[/tex]
[tex]P( Z<0.09) = 0.53586[/tex]
So
[tex]P(0.09 < \mu < 1.2 ) = 0.88493 - 0.53586[/tex]
[tex]P(0.09 < \mu < 1.2 ) = 0.349[/tex]
Hence the percentage is
[tex]P(0.09 < \mu < 1.2 ) = 34.9\%[/tex]
Does the following table represent a function? Explain.
Answer:
The table represents a function because each input corresponds to exactly one output.
Step-by-step explanation:
A table can be regarded as representing a function if and only if every input can only be mapped to exactly one output. In other words, it means, only 1 exact output can be assigned to an input. In a table of function, an input cannot have two different outputs. Although, two different inputs can be assigned to the same output.
From the table given, we see that every input has exactly one output. Although, we have different inputs that gives the same output.
Therefore, we can conclude that the table represents a function because each input corresponds to exactly one output.
ab when a = 1/2 and b= 3/4
Answer:
3/8
Step-by-step explanation:
1/2*3/4
is
(1*3)/(2*4)
So it's 3/8
Answer:
Here,
a=[tex] \frac{1}{2} [/tex]
b=[tex] \frac{3}{4} [/tex]
Now,
[tex]ab \\ = \frac{1}{2} \times \frac{3}{4} \\ = \frac{3}{8} [/tex]
2x +3=11
The value of X
Answer:
x=4
Step-by-step explanation:
2x+3=11
2x+3-3=11-3
2x=8
x=4
2x+3=11
2(4)+3=11
8+3=11
11=11
Answer:
x =4
Step-by-step explanation:
[tex]2x +3=11\\\\Collect \:like\:terms\\2x =11-3\\\\Subtract\\2x =8\\\\Divide\:both\:sides\:of\:the\:equation\:by\:2\\\frac{2x}{2} =\frac{8}{2} \\\\x = 4[/tex]
Find the value of 3/4 x 14
Answer:
21/2
Step-by-step explanation:
[tex]\frac{3}{4}\times\:14\\\\\mathrm{Convert\:element\:to\:fraction}:\quad \:14=\frac{14}{1}\\=\frac{3}{4}\times\frac{14}{1}\\\\\mathrm{Cross-cancel\:common\:factor:}\:2\\=\frac{3}{2}\times\frac{7}{1}\\\\=\frac{3\times\:7}{2\times\:1}\\\\=\frac{21}{2}[/tex]
agalar help mee agalar yardım
Answer: 510°
Step-by-step explanation:
1st. solution.
Draw the perpendicular EP ⊥FB.
So from quadrilateral FAEP we find the∡AEP ( sum of all angles in quadrilateral=360°)
∡AEP= 360°-∡FAE-∡AFP-∡FPE=360°-20°-90°-90°=160°
Draw CK ⊥FB
From triangle CKB we can find ∡BCK=180°-10°-90°=80°
From pentagon PEDCK (sum of PEDCK angles= 540°) we can find the sum of ∡PED+∡DCK= 540°-∡EPK-∡EDC-∡CKP= 540°-90°-90°-90°=270°
∡DEA+∡DCB=∡AEP+∡PED+∡DCK+∡KCB=160°+270°+80°=510°
Answer:
CEVAP 50ymis knk öyle dediler iwkwjskaoqkwjwhd
2!/0! = 2, 0 or undefined
Answer:
Undefined.
Step-by-step explanation:
Because there is a 0 in the denominator.
Answer:
Undefined
Step-by-step explanation:
Because you cant divide by 0
Which x values is the graph below discontinuous?
Answer: {...-3, -1, 1, 3, 5...}
Step-by-step explanation:
For a point to be discontinuous, the graph doesn't exist at that point. This means, it is represented with an open circle. All we have to do is to list out all the open circles on the graph.
{-3, -1, 1, 3, 5}
Answer:
b. {... –3, –1, 1, 3, ...}
Step-by-step explanation:
so basically it's b. the person above me is right they just added a 5 to the end
Evaluate the expression. Write the result in simplest form. (Do not enter a mixed number.) 3 3/4 + 9 7/8
Answer:
13 5/8
Step-by-step explanation:
3 3/4+9 7/8
15/4+79/8
30/8+79/8
109/8
simplify
13 5/8
Convert without rounding 1/8 to a decimal
Answer:
.125
Step-by-step explanation:
.125 * 8 = 1