4. A simple random sample of 16 observations from a normal population resulted in a sample mean of 17.25 and a sample standard deviation of 3.3. Develop a 95% confidence interval for the population mean. (Z=1.64)

A First Course in Probability (10th Edition)
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Chapter1: Combinatorial Analysis
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Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Exhibit (i)
The following data show the number of hours worked by 200 statistics students.
Number of Hours
Frequency
0-9
10 - 19
20 - 29
30 - 39
40
50
70
40
Refer to Exhibit (i).
4. A simple random sample of 16 observations from a normal population resulted in a sample
mean of 17.25 and a sample standard deviation of 3.3. Develop a 95% confidence interval for
the population mean. (Z=1.64)
The price of lunch at the mall has a mean of $5.00. The standard deviation
1.50. Fi
following.
5. Probability of spending less than $5.62
Z-score:
P(xs5.62):
Transcribed Image Text:Exhibit (i) The following data show the number of hours worked by 200 statistics students. Number of Hours Frequency 0-9 10 - 19 20 - 29 30 - 39 40 50 70 40 Refer to Exhibit (i). 4. A simple random sample of 16 observations from a normal population resulted in a sample mean of 17.25 and a sample standard deviation of 3.3. Develop a 95% confidence interval for the population mean. (Z=1.64) The price of lunch at the mall has a mean of $5.00. The standard deviation 1.50. Fi following. 5. Probability of spending less than $5.62 Z-score: P(xs5.62):
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