Question
In: Statistics and Probability
A researcher is interested in finding a 95% confidence interval for the mean number minutes students...
A researcher is interested in finding a 95% confidence interval for the mean number minutes students are concentrating on their professor during a one hour statistics lecture. The study included 41 students who averaged 34.7 minutes concentrating on their professor during the hour lecture. The standard deviation was 12.1 minutes. Round answers to 3 decimal places where possible.
a. To compute the confidence interval use a distribution.
b. With 95% confidence the population mean minutes of concentration is between and minutes.
c. If many groups of 41 randomly selected members are studied, then a different confidence interval would be produced from each group. About ? percent of these confidence intervals will contain the true population mean minutes of concentration and about ? percent will not contain the true population mean minutes of concentration.
Solutions
orchestra answered 2 years agoRelated Solutions
A researcher is interested in finding a 95% confidence interval for the mean number minutes students...
A researcher is interested in finding a 95% confidence interval
for the mean number minutes students are concentrating on their
professor during a one hour statistics lecture. The study included
133 students who averaged 41.3 minutes concentrating on their
professor during the hour lecture. The standard deviation was 13.3
minutes. Round answers to 3 decimal places where possible.
a. To compute the confidence interval use a ? t
z distribution.
b. With 95% confidence the population mean minutes of
concentration is...
A researcher is interested in finding a 90% confidence interval for the mean number minutes students...
A researcher is interested in finding a 90% confidence interval
for the mean number minutes students are concentrating on their
professor during a one hour statistics lecture. The study included
128 students who averaged 42.3 minutes concentrating on their
professor during the hour lecture. The standard deviation was 10.7
minutes. Round answers to 3 decimal places where possible.
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distribution.
b. With 90% confidence the population mean minutes of...
A researcher is interested in finding a 99% confidence interval for the mean number minutes students...
A researcher is interested in finding a 99% confidence interval
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25
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22
19
15
20
7
27
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mean number of visits for physical therapy patients. The data below
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patients. Round answers to 3 decimal places where possible.
15
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You are interested in finding a 95% confidence interval for the mean number of visits for...
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mean number of visits for physical therapy patients. The data below
show the number of visits for 13 randomly selected physical therapy
patients. Round answers to 3 decimal places where possible.
17
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7
9
7
15
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