Chapter 23
Name
Quiz A, you may only use your notes!
A researcher collected data and measured body temperatures of 25 randomly selected
adults. He found a sample mean of 98.285 and sample standard deviation of 0.6824.
Using a 90% confidence level, answer the following questions. Round to three decimal
places and show work!
1.
Identify the critical value,
2.
3.
.
1.
1.711
Calculate the margin of error.
2.
0.234
Calculate the confidence interval.
3.
(98.051, 98.519)
Chapter 23
Name
Quiz B, you may only use your notes!
A researcher collected data and measured body temperatures of 26 randomly selected
adults. He found a sample mean of 98.285 and sample standard deviation of 0.6824.
Using a 90% confidence level, answer the following questions. Round to three decimal
places and show work!
1.
Identify the critical value,
2.
3.
.
1.
1.708
Calculate the margin of error.
2.
0.229
Calculate the confidence interval.
3.
(98.056, 98.514)
Chapter 23
Name
Quiz C, you may only use your notes!
A researcher collected data and measured body temperatures of 27 randomly selected
adults. He found a sample mean of 98.265 and sample standard deviation of 0.6824.
Using a 90% confidence level, answer the following questions. Round to three decimal
places and show work!
1.
Identify the critical value,
2.
3.
.
1.
1.706
Calculate the margin of error.
2.
0.224
Calculate the confidence interval.
3.
(98.041, 98.489)
Chapter 23
Name
Quiz D, you may only use your notes!
A researcher collected data and measured body temperatures of 28 randomly selected
adults. He found a sample mean of 98.265 and sample standard deviation of 0.6824.
Using a 90% confidence level, answer the following questions. Round to three decimal
places and show work!
1.
Identify the critical value,
2.
3.
.
1.
1.703
Calculate the margin of error.
2.
0.220
Calculate the confidence interval.
3.
(98.045, 98.485)
Chapter 23
Name
Quiz E, you may only use your notes!
A researcher collected data and measured body temperatures of 29 randomly selected
adults. He found a sample mean of 98.285 and sample standard deviation of 0.6624.
Using a 90% confidence level, answer the following questions. Round to three decimal
places and show work!
1.
Identify the critical value,
2.
3.
.
1.
1.701
Calculate the margin of error.
2.
0.209
Calculate the confidence interval.
3.
(98.076, 98.494)
Chapter 23
Name
Quiz F, you may only use your notes!
A researcher collected data and measured body temperatures of 30 randomly selected
adults. He found a sample mean of 98.285 and sample standard deviation of 0.6624.
Using a 90% confidence level, answer the following questions. Round to three decimal
places and show work!
1.
Identify the critical value,
2.
3.
.
1.
1.699
Calculate the margin of error.
2.
0.205
Calculate the confidence interval.
3.
(98.08, 98.49)