BRAINLIEST STARS
3. The following dot plots compare the height of the members of the basketball team and the swimming team.
Determine the mean, median, and mode for each dot plot. Show your work!
Answer:
The mean for the first one is 65.83
the median is 65.5
the mode is 66
Step-by-step explanation:
to find the mean you add all your numbers together then divide by how many you have. So all the numbers added together then divided by 12.
The median is the middle number of your list. I would reccomend you to list out your numbers from least to greatest, then cross out the outer number until you get the middle number. in your case it is an even number so it is 65.5.
The mode, basically asking out of your numbers listed which has the most numbers. "sounds like most".
PLS help ASAP DUE IN 20 MINUTES I CANT FIGURE IT OUT
Answer:
x=8
Step-by-step explanation:
if you multiply 6 by 8 and subtracted by 3 it will equal 45
Two separate tests are designed to measure a student's ability to solve problems. Several students are randomly selected to take both test and the results are give below Test A | 64 48 51 59 60 43 41 42 35 50 45 Test B | 91 68 80 92 91 67 65 67 56 78 71 (a) What is the value of the linear coefficient r (b) Assuming a 0.05 level of significance, what is the critical value
Answer:
a) r = 0.974
b) Critical value = 0.602
Step-by-step explanation:
Given - Two separate tests are designed to measure a student's ability to solve problems. Several students are randomly selected to take both test and the results are give below
Test A | 64 48 51 59 60 43 41 42 35 50 45
Test B | 91 68 80 92 91 67 65 67 56 78 71
To find - (a) What is the value of the linear coefficient r ?
(b) Assuming a 0.05 level of significance, what is the critical value ?
Proof -
A)
r = 0.974
B)
Critical Values for the Correlation Coefficient
n alpha = .05 alpha = .01
4 0.95 0.99
5 0.878 0.959
6 0.811 0.917
7 0.754 0.875
8 0.707 0.834
9 0.666 0.798
10 0.632 0.765
11 0.602 0.735
12 0.576 0.708
13 0.553 0.684
14 0.532 0.661
So,
Critical r = 0.602 for n = 11 and alpha = 0.05
A psychologist would like to examine the effect of fatigue on mental alertness. An attention test is prepared which requires subjects to sit in front of a blank TV screen and press a response button each time a dot appears on the screen. A total of 110 dots are presented during a 90-minute period, and the reach subject. Two groups of subjects are selected. The first group (n 5) is tested after they have been kept awake for 24 hours. The second group (n-10) is tested in the morning after a full night's sleep. The data for these two samples are as follows:
Awake 24 hours rested
x=35 X=24
ss=120 ss =360
On the basis of these data, can psychologist conclude that fatigue significantly increases errors on an attention task? Test with α-05 and report effect size.
Answer:
The calculated value of t= 0.1908 does not lie in the critical region t= 1.77 Therefore we accept our null hypothesis that fatigue does not significantly increase errors on an attention task at 0.05 significance level
Step-by-step explanation:
We formulate null and alternate hypotheses are
H0 : u1 < u2 against Ha: u1 ≥ u 2
Where u1 is the group tested after they were awake for 24 hours.
The Significance level alpha is chosen to be ∝ = 0.05
The critical region t ≥ t (0.05, 13) = 1.77
Degrees of freedom is calculated df = υ= n1+n2- 2= 5+10-2= 13
Here the difference between the sample means is x`1- x`2= 35-24= 11
The pooled estimate for the common variance σ² is
Sp² = 1/n1+n2 -2 [ ∑ (x1i - x1`)² + ∑ (x2j - x`2)²]
= 1/13 [ 120²+360²]
Sp = 105.25
The test statistic is
t = (x`1- x` ) /. Sp √1/n1 + 1/n2
t= 11/ 105.25 √1/5+ 1/10
t= 11/57.65
t= 0.1908
The calculated value of t= 0.1908 does not lie in the critical region t= 1.77 Therefore we accept our null hypothesis that fatigue does not significantly increase errors on an attention task at 0.05 significance level
Suppose that you are looking for a student at your college who lives within five miles ofyou. You know that 55 percent of the 25,000 students do live within five miles of you. Yourandomly contact students from the college until one says he or she lives within five miles ofyou. What is the probability that you need to contact four people
Answer:
The probability that I need to contact four people is 9.11%.
Step-by-step explanation:
Since I am looking for a student at my college who lives within five miles of me, and I know that 55 percent of the 25,000 students do live within five miles of me, and I randomly contact students from the college until one says he or she lives within five miles of me, to determine what is the probability that I need to contact four people, the following calculation must be performed:
0.45 x 0.45 x 0.45 = X
0.2025 x 0.45 = X
0.091125 = X
Therefore, the probability that I need to contact four people is 9.11%.
Ms. Wilson's class is choosing a fiction book to read together. The students voted for their
favorite type of fiction book.
Favorite type of fiction book
Type Frequency
Fantasy
6
Mystery
3
Realistic
7
Historical
2.
Adventure
7
Historical fiction received the fewest votes. What percent of students voted for historical
fiction?
%
Answer:
[tex]\%H = 8\%[/tex]
Step-by-step explanation:
Given
See attachment for table
Required
The percentage of historical
From the table, we have:
[tex]Historical = 2[/tex]
and
[tex]Total = 6+3+7+2+7[/tex]
[tex]Total = 25[/tex]
So, the percentage of historical is:
[tex]\%H = \frac{Historical}{Total} * 100\%[/tex]
This gives:
[tex]\%H = \frac{2}{25} * 100\%[/tex]
[tex]\%H = \frac{200\%}{25}[/tex]
[tex]\%H = 8\%[/tex]
Answer:
8%
Step-by-step explanation:
A.60
B.120
C.240
D.360
Answer:
b i think brainlest me plz
Step-by-step explanation:
Can anyone PLEASE help me with this!?
What are the missing vertex?
Answer:
1,5 I think
Step-by-step explanation:
hope this helps
Answer:
im not sure but i think its 1,5
Pls help I need this pls help I’m begging u have a good day pls help
Answer:
25
Step-by-step explanation:
Answer:
J
Step-by-step explanation:
In order to solve this question, we need to subtract the smaller area of the hole from the bigger area of the actual donut. We use the formula [tex]a=\pi r^2[/tex]. We plug the numbers in for the smaller circle and the area of the smaller circle is 3.14. Then, we plug in the numbers for the bigger number and we get 28.27. We subtract 3.14 from 28.27 and we get approximately 25, which is equal to J.
Slove for the value of a
Answer:
a = 11
Step-by-step explanation:
9a + 6 + 75 = 180
9a + 81 = 180
9a = 99
a = 11
What is the sum? Complete the equation.
8+(-18) =
Select Parameter or Statistic to classify each statement.
1.) 85% of those surveyed were in favor of bike lanes.
Parameter or Statistic
2.) Each member of the soccer team has an average of 2 jerseys.
Parameter or Statistic
3.) Of the 100 swim teams surveyed across America, 23 practice 10 hours a week.
Parameter or Statistic
4.) The golf team's average score is 79.
Parameter or Statistic
Answer:
1) Statistic
2) Parameter
3) Statistic
4) Parameter.
Step-by-step explanation:
Parameter: is a number that describes the whole population.
Statistic: is a number that describes a sample.
The difference is:
50% of the cats are nice (parameter, because talks about all the cats)
out of 100 cats surveyed, 39 are nice (statistic, because talks about a sample of 100 cats)
Then:
1) 85% of those surveyed were in favor of bike lanes.
This only refers to the surveyed people, so this only refers to a sample (and not the population that this sample represents) then this is a statistic statement.
2) Each member of the soccer team has an average of 2 jerseys.
In this case, we are talking about the whole population (the soccer team) then this is a parameter
3) Of the 100 swim teams surveyed across America, 23 practice 10 hours a week.
Here the information is about the sample (only 100 swim teams). So here the correct option is statistic.
4) The golf team's average score is 79
Here the information is about the average score for the entire golf team, so this information is about all the population in the golf team, then in this case the correct option is parameter.
Answer:
Statistic
Parameter
Statistic
Parameter
Step-by-step explanation:
i took the test :)
A theater sold 465 tickets for the morning show and 576 tickets for the evening show. The theater makes $16 for each ticket sold. How much money did the theater make selling tickets for the morning show? ANSWE QUICKKK
Manesh is putting new tile on a kitchen counter. Each sheet of tile will cover 1.5 ft squared. How many sheets of tile will Manesh need to cover the whole counter?
Answer:
I will try my best to help
Step-by-step explanation:
Solve the system of equations and choose the correct answer from the list of options.
d + e = 12
−d + e = −8
Label the ordered pair as (d, e). (4 points)
(0, 0)
(2, 10)
(10, 2)
(12, 0)
9514 1404 393
Answer:
(c) (10, 2)
Step-by-step explanation:
Adding the two equations, we have ...
(d +e) +(-d +e) = (12) +(-8)
2e = 4
e = 2 . . . . . . matches choice C
(d, e) = (10, 2)
Answer:
The ordered pair as (d, e) is (10, 2).Step-by-step explanation:
Given that:
d + e = 12 ______(i) - d + e = - 8 ______(ii)To Label:
The ordered pair as (d, e).Adding equation (i) and (ii).
⟶ d + e + (- d + e) = 12 + (- 8)
⟶ d + e + - d + e = 12 - 8
Cancelling d.
⟶ 2e = 4
⟶ 2e = 2 × 2
Cancelling 2.
⟶ e = 2
In equation (i)
⟶ d + e = 12
Putting the value of e.
⟶ d + 2 = 12
⟶ d = 12 - 2
⟶ d = 10
Hence,
The ordered pair as (d, e) = (10, 2)expand : log3(x^3/81y^2)
Answer:
Use rules of logarithms to expand.
2
log
3
(
x
)
−
4
−
4
log
3
(
y
)
Step-by-step explanation:
Taylor’s dad offered to loan her $1,500 to buy a car with an annual interest rate of 15 percent. Assuming she pays her dad back at the end of one year, how much will she have paid for the car?
Answer:
$1,725
Step-by-step explanation:
Given that
The loan amount is $1,500
The interest rate is 15%
And, the time period is one year
We need to find out the future value
so,
The future value = present value × (1 + rate of interest)^number of years
= $1,500 × (1 + 0.15)^1
= $1,500 × 1.15
= $1,725
help plsss fast plsplspsls
Q
angles.
(2x+38)°
+
(x-10
р
R
Please help me solve this
Answer:
x=38
Step-by-step explanation:
First, know that the sum of the angles in a triangle is 180.
Then, add the angles. 2x+38+x+x-10.
Make them equal to 180.
2x+38+x+x-10=180
Simplify.
4x+28=180
Subtract 28 from 180.
4x=152
Divide 4 from 152 to make x alone.
x=38
There you go!
Please mark brainliest!
Your friend finds the volume of the rectangular prism. Is your friend correct? Explain your reasoning
Answer:
YES, my friend is correct.
Step-by-step explanation:
Formula for the volume of the rectangular prism = Length*Width*Height
Length = 7 mm
Width = 4 mm
Height = 2 mm
Plug in the values
Volume = 7*4*2
Volume = 28*2
= 56 mm³
Therefore, my friend is correct.
Element X is a radioactive isotope such that every 6 years, its mass decreases by a half. Given that the initial mass of a sample of
Element X is 46 grams, write a function to model the mass of the element.
What are the solutions of the compound inequality?
Graph the solutions.
2x-2<-12 or 2x+3>7
Answer:
x < -5 or x > 2 , and because or can be in either, doesn't and literally can't be in both
Step-by-step explanation:
When you simplify 2x-2>12, it's like an algebra problem where you just add 2 to both sides and then divide by 2. Same for 2x+3>7, except you subtract 3 and then divide by 2
!!! 25 points!!! Which statement is supported by the cell theory?
A. All animal cells are the same size.
B. All plant cells are the same shape.
C. Similar organisms all have the same number of cells.
D. Cells are the primary unit of structure in living organisms.
Answer:
Its D
Step-by-step explanation:
All the other answers doesn't make sense and cells is what makes up your body
Your answer is going to be d
What is the slope of the two points (-20,-4), (-12,-19)
some please help asap !!
Answer:
The answer should be 0.66
Which of the following is not equivalent to the following expression 3)____ 2x2- 16
a. 2x2 + 4x – 4x - 16
b. 2(x2 – 8)
c. 2(x + 8)
d. 4x2 - 32
2
Erin uses a spinner divided into four equal sections to decide which drink she’ll have with her lunch. The sections represent water, milk, lemonade, and tea. If she spins the spinner three days in a row, what is the probability that she drinks lemonade one day, tea one day, and water one day? Complete the steps below to find the sample space and solve the problem. PART A - Create a list of all the possible outcomes for three days of drink selections. Use the abbreviations W, M, T, and L to represent water, milk, tea, and lemonade. PART B - Based on the list you created in part A, how many possible outcomes are there? PART C - What is the probability that Erin drinks lemonade one day, tea one day, and water one day? PART D - What is the probability that Erin drinks water two days and lemonade one day?
Answer:
Part A
W W W M W W T W W L W W
W W M M W M T W M L W M
W W T M W T T W T L W T
W W L M W L T W L L W L
W M W M M W T M W L M W
W M M M M M T M M L M M
W M T M M T T M T L M T
W M L M M L T M L L M L
W T W M T W T T W L T W
W T M M T M T T M L T M
W T T M T T T T T L T T
W T L M T L T T L L T L
W L W M L W T L W L L W
W L M M L M T L M L L M
W L T M L T T L T L L T
W L L M L L T L L L L L
Part B
There are 64 possible outcomes. The sample size is 64.
Part C
To find the probability that Erin drinks lemonade one day, tea one day, and water one day, consider all the cases in which L, T, and W occur one time. Because the order doesn't matter in this scenario, these six outcomes from the list represent the desired event: W T L, T W L, T L W, W L T, L W T, and L T W.
The size of the sample space is 64. So, the probability that Erin drinks lemonade one day, tea one day, and water one day is 3/32.
Part D
To find the probability that Erin drinks water on two days and lemonade one day, we consider all the cases in which two Ws and one L occur. Because the order doesn't matter in this scenario, these three outcomes from the list represent the event: W W L, W L W, and L W W.
The size of the sample space is 64. So, the probability that Erin drinks water two days and lemonade one day is 3/64
Step-by-step explanation:
help with problem please..
YT radio play songs at random every day from the hundreds of songs it contains in memory data. Any song can be played at any time, even if it is repeated. There are 500 pop songs, 330 Country songs, 265 rock songs, and 405 R&B songs. If the station just played two pop songs in a row, what is the probability that the next song will also be a pop song?
Answer:
498/1500
Step-by-step explanation:
tell me if im right please