z scores
t scores
confidence intervals
Hypothesis Testing
catahgorey
100
The average math SAT score for 24 high school seniors are 550 with a standard deviation of 70. Find the z score of someone who scored 520 on the SAT.
.0183
100
The p-value of df 12 and t-score 4.2.
What is .0005?
100
what is the p-value if the n=29 and confidence is 90%
1.701
100
if the p value is .027 do we accept or reject?
Reject
100
how many feet do penguins have
17
200
The average number of pages in a novel is 400 pages. 60 of the novels observed have an average of 367 pages with a standard deviation of 90. Find the z score.
.0023
200
The t-score for p-value .02 and df 15.
What is 2.249?
200
what is the p-value if the n=15 and confidence is 80%
1.345
200
Find the z-score of the amount of time the test took students to take if the estimate was 12 minutes, Average time for students was 14.5, standard deviation was 4.3 and there were 15 students total.
2.25
200
how many people
at least 4
300
7 friends go out trick or treating, and then count how much candy they have afterwards. They average to about 476 pieces of candy, with a standard deviation of 67. Find the z score of the friend who collected 358 pieces of candy.
off the chart
300
The average amount of cars a person before 43 is 3. In a sample of 40 people, the average was 4 with a standard deviation of 2.3. This is the t-value.
What is 2.718?
300
what is the equation for confidence interval for z/t/and proportion?
x+/-t(sx)/sqrt n and p=p hat +/- z sqrt p hat(1-p hat)/n
300
it is estimated that the average highschool student has 3 pairs of shoes. In a random sample of 20 students, there was an average of 5.15 pairs of shoes, with a standard deviation of 2.76. What is the P- value? Do we reject the Ho?
0.003, yes we reject
300
who was the 69th president
George?
400
The average IQ of 90 high schoolers is 105 with a standard deviation of 32. Johnny has an iq of 124. Find the z score.
What is .0217?
400
The average length of an adult men’s shoe is 10. In a sample of 200 people, the average was 8.5 with a standard deviation of 1.6. This is the p-score.
What is .025?
400
30 times I've bought milk the average price per gallon is $4.15with a standard deviation of 0.5. What would a 90% confidence interval be for the mean price of milk?
z=1.699 4.15-1.699x 5/sqrt 30 =3.99
4.15+1.699 x 5/sqrt 30= 4.31
(3.99,4.31)
400
5 students were asked how many electives they take at school. It was estimated that they High school students take an average of 3. here is the data:
1,1,2,2,3. Find the sample average, standard deviation, and z score
sample avg: 1.8
STDEV: 0.836
Z score: -3.21
400
where is the nearest cracker barrel
Cracker Barrel Old Country Store, 1795 Andover St, Tewksbury, MA 01876
500
the average score on a english test in a class of 12 students is 84. 2 students get a 97, 4 get a 90, 3 get 85’s and the rest get 70’s. Find the Standard Deviation and find the z score of a student who got a 85
STDEV=9.82, z score= .3632
500
The average bookstore sell 323 comicbooks. In a sample of 1000, 275 was the average amount of sold comic books with a standard deviation of 15. This is the p-score.
What is .0005?
500
The average number of clubs that high school students attend is 2. Asked 20 students from WHS and found out that the average number of those who attend more than one is 5 with a standard deviation 1.5.write a conclusion. What would a 99% confidence interval be for people who attend clubs?
8.94 p-value .0005 reject. there is evidence saying that average of attending club is greater that 2.
99% (4.04,5.96)
500
15 students were asked to pick a number 1-50, the interviewers estimated the average would be 32. Here was the data: 8,12,14,17,17,23,24,25,28,39,40,41,41,44,45
Find the average, STDEV, z-score, p value.
average: 27.86
STDEv: 12.79
500
who
micahel