In a test of the Atkins weight loss program, 27 individuals participated in a randomized trial with overweight adults. After one year, the mean weight loss was 7.1 pounds with a standard deviation of 4.8 pounds. Construct a 90% confidence interval of the mean weight loss for all such subjects.
In a test of the Atkins weight loss program, 27 individuals participated in a randomized trial with overweight adults. After one year, the mean weight loss was 7.1 pounds with a standard deviation of 4.8 pounds. Construct a 90% confidence interval of the mean weight loss for all such subjects.
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![pounds. Construct a 90% confidence interval of the mean weight loss for all such subjects.
overweight adults. After one year, the mean weight loss was 7.1 pounds with a standard deviation of 4.8
n a test of the Atkins weight loss program, 27 individuals participated in a randomized trial with
8) A SRS of 40 of the same model of car results in an annual mean maintenance cost of $575 and a standard
deviation of $86. Construct a 95% confidence interval for the annual mean maintenance cost of all cars of
that model type.
9) The GPA for a SRS of CCC students is given below.
3.70
1.92
2.00
2.15 2.65 3.15
2.86
3.19
2.33
3.21
3.45
1.25
2.90
2.56
1.14
1.76
a) Construct a 90% confidence interval for the population mean GPA of all CCC students.
b) Does your interval suggest the population mean is greater than 2.0? Explain your reasoning.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F358ec156-4683-4f1c-8890-4453a603d24a%2Fa15037a6-d8c8-49e9-9934-db4f0499deeb%2Fk02rxvpa_processed.jpeg&w=3840&q=75)
Transcribed Image Text:pounds. Construct a 90% confidence interval of the mean weight loss for all such subjects.
overweight adults. After one year, the mean weight loss was 7.1 pounds with a standard deviation of 4.8
n a test of the Atkins weight loss program, 27 individuals participated in a randomized trial with
8) A SRS of 40 of the same model of car results in an annual mean maintenance cost of $575 and a standard
deviation of $86. Construct a 95% confidence interval for the annual mean maintenance cost of all cars of
that model type.
9) The GPA for a SRS of CCC students is given below.
3.70
1.92
2.00
2.15 2.65 3.15
2.86
3.19
2.33
3.21
3.45
1.25
2.90
2.56
1.14
1.76
a) Construct a 90% confidence interval for the population mean GPA of all CCC students.
b) Does your interval suggest the population mean is greater than 2.0? Explain your reasoning.
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