(a) What is the best point estimate, based on the sample, to use for the population mean? (b) For each of the following sampling scenarios, determine which distribution should be used to calculate the critical value for the 99% confidence interval for the population mean. (In the table, Z refers to a standard normal distribution, and t refers to a t distribution.) Sampling scenario The sample has size 17, and it is from a normally distributed population with an unknown standard deviation. The sample has size 18, and it is from a population with a distribution about which we know very little. The sample has size 80, and it is from a non-normally distributed population with a known standard deviation of 76. N O O O O O X 5 Could use either Z or t O O Unclear O O X
(a) What is the best point estimate, based on the sample, to use for the population mean? (b) For each of the following sampling scenarios, determine which distribution should be used to calculate the critical value for the 99% confidence interval for the population mean. (In the table, Z refers to a standard normal distribution, and t refers to a t distribution.) Sampling scenario The sample has size 17, and it is from a normally distributed population with an unknown standard deviation. The sample has size 18, and it is from a population with a distribution about which we know very little. The sample has size 80, and it is from a non-normally distributed population with a known standard deviation of 76. N O O O O O X 5 Could use either Z or t O O Unclear O O X
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 4CYU
Related questions
Question
Transcribed Image Text:You would like to construct a 99% confidence interval to estimate the population mean store on a nationwide examination in finance, and for this purpose we
choose a random sample of exam scores. The sample we choose has a mean of 485 and a standard deviation of 77.
(a) What is the best point estimate, based on the sample, to use for the population mean?
(b) For each of the following sampling scenarios, determine which distribution should be used to calculate the critical value
for the 99% confidence interval for the population mean.
(In the table, Z refers to a standard normal distribution, and t refers to a t distribution.)
Sampling scenario
The sample has size 17, and it is from a normally distributed
population with an unknown standard deviation.
The sample has size 18, and it is from a population with a
distribution about which we know very little.
The sample has size 80, and it is from a non-normally distributed
population with a known standard deviation of 76.
Continue
F3
DOD
000 F4
F5
Z
O O
O
O
t
F6
O
O
MacBook Air
Could use
either Z or t
O
O
X 5
O
F7
Unclear
O
O
FO
F10
Submit Assignm
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 2 steps
Recommended textbooks for you
Glencoe Algebra 1, Student Edition, 9780079039897…
Algebra
ISBN:
9780079039897
Author:
Carter
Publisher:
McGraw Hill
Glencoe Algebra 1, Student Edition, 9780079039897…
Algebra
ISBN:
9780079039897
Author:
Carter
Publisher:
McGraw Hill