A random sample of 18 venture-capital investments in a certain business sector yielded the accompanying data, in millions of dollars. Assuming that the population standard deviation is $1.84 million, a 95% confidence interval for the mean amount, u, of all venture-capital investments in this business sector is from $5.23 million to $6.93 million. Conditions for computing the confidence interval are satisfied. Complete parts (a) through (d) below. (Note: The sum of the data is $109.49 million and the mean is $6.08 million.) Click here to view the investment data, Click here to view page 1 of the table of areas under the standard normal curve, Click here to view page 2 of the table of areas under the standard normal curve. a. Find a 90% confidence interval for µ. The 90% confidence interval is from $ million to $ million. (Round to two decimal places as needed.) - X Investment Data 5.27 6.37 6.15 9.39 2.67 5.31 5.04 5.76 3.57 8.55 5.22 6.54 4.10 7.15 8.73 5.16 8.58 5.93 Print Done

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8.2.75
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A random sample of 18 venture-capital investments in a certain business sector yielded the accompanying data, in millions of dollars. Assuming that the population standard deviation is $1.84 million, a 95%
confidence interval for the mean amount, µ, of all venture-capital investments in this business sector is from $5.23 million to $6.93 million. Conditions for computing the confidence interval are satisfied. Complete
parts (a) through (d) below. (Note: The sum of the data is $109.49 million and the mean is $6.08 million.)
Click here to view the investment data.
Click here to view page 1 of the table of areas under the standard normal curve.
Click here to view page 2 of the table of areas under the standard normal curve.
a. Find a 90% confidence interval for
H.
The 90% confidence interval is from $
million to $
million.
(Round to two decimal places as needed.)
- X
Investment Data
5.27
6.37
6.15
9.39
2.67
5.31
5.04
5.76
3.57
8.55
5.22
6.54
4.10
7.15
8.73
5.16
8.58
5.93
Print
Done
Transcribed Image Text:8.2.75 Question Help A random sample of 18 venture-capital investments in a certain business sector yielded the accompanying data, in millions of dollars. Assuming that the population standard deviation is $1.84 million, a 95% confidence interval for the mean amount, µ, of all venture-capital investments in this business sector is from $5.23 million to $6.93 million. Conditions for computing the confidence interval are satisfied. Complete parts (a) through (d) below. (Note: The sum of the data is $109.49 million and the mean is $6.08 million.) Click here to view the investment data. Click here to view page 1 of the table of areas under the standard normal curve. Click here to view page 2 of the table of areas under the standard normal curve. a. Find a 90% confidence interval for H. The 90% confidence interval is from $ million to $ million. (Round to two decimal places as needed.) - X Investment Data 5.27 6.37 6.15 9.39 2.67 5.31 5.04 5.76 3.57 8.55 5.22 6.54 4.10 7.15 8.73 5.16 8.58 5.93 Print Done
8.2.73
Question Help
According to a study of political prisoners, the mean duration of imprisonment for 30 prisoners with chronic post-traumatic stress disorder (PTSD) was 31.3 months. Assuming that o = 44 months, determine a
95% confidence interval for the mean duration of imprisonment, µ, of all political prisoners with chronic PTSD. Interpret your answer in words.
Click here to view Page 1 of the table of areas under the standard normal curve.
Click here to view Page 2 of the table of areas under the standard normal curve.
A 95% confidence interval for the population mean is from
months to
months.
(Round to one decimal place as needed.)
Transcribed Image Text:8.2.73 Question Help According to a study of political prisoners, the mean duration of imprisonment for 30 prisoners with chronic post-traumatic stress disorder (PTSD) was 31.3 months. Assuming that o = 44 months, determine a 95% confidence interval for the mean duration of imprisonment, µ, of all political prisoners with chronic PTSD. Interpret your answer in words. Click here to view Page 1 of the table of areas under the standard normal curve. Click here to view Page 2 of the table of areas under the standard normal curve. A 95% confidence interval for the population mean is from months to months. (Round to one decimal place as needed.)
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