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.
a. To compute the confidence interval use a _____ (t? or z?)
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
for the mean number minutes students are concentrating on their
professor during a one hour statistics lecture. The study included
105 students who averaged 38.1 minutes concentrating on their
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a. To compute the confidence interval use a ? z
t distribution.
b. With 99% confidence the population mean minutes of
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for the mean number of times per day that college students text.
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The standard deviation was 23.6 texts. Round answers to 3 decimal
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patients.
25
28
22
19
15
20
7
27
23
6
a. To compute the confidence interval use a ? z
t distribution.
b. With 95% confidence the population mean number of visits per
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visits.
c. If many groups of 10 randomly selected...
The mayor is interested in finding a 95% confidence interval for the mean number of pounds...
The mayor is interested in finding a 95% confidence interval for
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number of pounds of trash generated per person per week was 37.4
pounds and the standard deviation was 8.9 pounds. Round answers to
3 decimal places where possible.
Fill in the blanks
1.With 95% confidence the population mean number of pounds per
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You are interested in finding a 95% confidence interval for the mean number of visits for...
You are interested in finding a 95% confidence interval for the
mean number of visits for physical therapy patients. The data below
show the number of visits for 14 randomly selected physical therapy
patients. Round answers to 3 decimal places where possible.
15
17
22
28
7
28
13
27
16
25
9
6
24
13
a. To compute the confidence interval use a ? t
z distribution.
b. With 95% confidence the population mean number of visits per
physical therapy...
You are interested in finding a 95% confidence interval for the mean number of visits for...
You are interested in finding a 95% confidence interval for the
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
6
7
9
7
15
15
11
6
15
25
14
26
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distribution.
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A researcher is interested in finding a 98% confidence interval for the mean number of times...
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The study included 96 students who averaged 41.6 texts per day. The
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A researcher is interested in finding a 90% confidence interval for the mean number of times...
A researcher is interested in finding a 90% confidence interval
for the mean number of times per day that college students text.
The study included 103 students who averaged 27.9 texts per day.
The standard deviation was 15.9 texts. Round answers to 3 decimal
places where possible.
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b. With 90% confidence the population mean number of texts per
day is between _ and _texts.
c. If many groups of 103...
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