
MTH93 Unit 5 Review
Authored by Amanda Reaume
Mathematics
12th Grade
CCSS covered
Used 8+ times

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15 questions
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1.
FILL IN THE BLANK QUESTION
15 mins • 1 pt
what is the positive critical value if you are 88 percent confident
Tags
CCSS.HSS.ID.A.4
2.
FILL IN THE BLANK QUESTION
15 mins • 1 pt
construct a 99% confidence interval for the following:
24 people were randomly selected to take part in a pizza survey on if they prefer thin or stuffed crust on their pizza. according to a recent (similar) survey it was found on average 62% of people preferred thin crust and the standard deviation was 5%. assume this data is normally distributed and round your answers off to the hundredths!
Tags
CCSS.HSS.IC.B.4
3.
FILL IN THE BLANK QUESTION
15 mins • 1 pt
A marketing specialist for Naples pizza wants to check on average how many people tend to pick thin crust over stuffed crust. He wants to be 96% confident and accurate within 1.5% of the mean. From a previous survey he found the standard deviation was 5%, how many people would need to be surveyed for this?
4.
FILL IN THE BLANK QUESTION
15 mins • 1 pt
Create a confidence interval for the following given information:
Mean = 32
n=17
sample standard deviation= 3.25
you want to be 90% confident and this distribution follows the normal distribution
round your answers off to the hundredths!
Answer explanation
is the T distribution!
Tags
CCSS.HSS.IC.B.4
5.
FILL IN THE BLANK QUESTION
15 mins • 1 pt
Would you use the standard normal table or t-distribution table to create a confidence interval for the following information:
Mean=18, standard deviation= 2.5, n=20, this follows a normal distribution.
Answer explanation
z table! n<30 but its normal and is not the sample standard dev!
Tags
CCSS.HSS.ID.A.4
6.
FILL IN THE BLANK QUESTION
15 mins • 1 pt
Would you use the standard normal table or t-distribution table to create a confidence interval for the following information:
Mean=211, sample standard deviation= 10, n=23, this follows a normal distribution.
Answer explanation
n<30 and the sample standard dev is given!
Tags
CCSS.HSS.ID.A.4
7.
FILL IN THE BLANK QUESTION
15 mins • 1 pt
Would you use the standard normal table or t-distribution table to create a confidence interval for the following information:
Mean=75, standard deviation= 14, n=60, this doesn't follows a normal distribution.
Answer explanation
n>30, doesnt need to follow a normal distribution since n is so big!
Tags
CCSS.HSS.ID.A.4
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