Question

A survey of several 9 to 11 year olds recorded the following amounts spent on a trip to the mall: $20.60,$16.44,$10.80,$13.86,$21.22,$10.65,$20.34 Construct the 95% confidence interval for the average amount spent by 9 to 11 year olds on a trip to the mall. Assume the population is approximately normal. Step 3 of 4 : Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.

Answer #1

A survey of several 9 to 11 year olds recorded the following
amounts spent on a trip to the mall: $19.26, $21.87, $15.83,
$20.57, $19.31, $24.74, $22.82 Construct the 95% confidence
interval for the average amount spent by 9 to 11 year olds on a
trip to the mall. Assume the population is approximately
normal.

A survey of several 10
to 11 year olds recorded the following amounts spent on a trip to
the mall:
$25.36,$29.05,$22.78,$24.07
Construct the 95%
confidence interval for the average amount spent by 10 to 11 year
olds on a trip to the mall. Assume the population is approximately
normal.

A survey of several 10 to 11 year olds recorded the following
amounts spent on a trip to the mall:
$18.41,$18.46,$17.83$18.41,$18.46,$17.83
Construct the 99% confidence interval for the average amount
spent by 10 to 11 year olds on a trip to the mall. Assume the
population is approximately normal.
Step 1 of 4:
Calculate the sample mean for the given sample data. Round your
answer to two decimal places.
Step 2 of 4:
Calculate the sample standard deviation for the...

A survey of several 11 to 13 year olds recorded the following
amounts spent on a trip to the mall:
$28.51,$25.01,$29.61,$30.31,$24.12,$27.49
Construct the 95% confidence interval for the average amount
spent by 11 to 13 year olds on a trip to the mall. Assume the
population is approximately normal.
Step 1 of 4 :
Calculate the sample mean for the given sample data. Round your
answer to two decimal places.

A survey of several 10 to 11 year olds recorded the following
amounts spent on a trip to the mall:
$19.17,$21.18,$20.38,$25.08 $19.17,$21.18,$20.38, $25.08
Construct the 90%90% confidence interval for the average amount
spent by 10 to 11 year olds on a trip to the mall. Assume the
population is approximately normal.
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A survey of several 8 to 10 year olds recorded the following
amounts spent on a trip to the mall:
$24.95, $20.44 ,$20.63, $21.78
Construct the 99% confidence interval for the average amount
spent by 8 to 10 year olds on a trip to the mall. Assume the
population is approximately normal.
Step 1: Calculate the sample mean for the given sample data.
Round your answer to two decimal places.
Step 2: Calculate the sample standard deviation for the given...

A survey of several 8 to 10 year olds recorded the following
amounts spent on a trip to the mall:
$24.95, $20.44 ,$20.63, $21.78
Construct the 99% confidence interval for the average amount
spent by 8 to 10 year olds on a trip to the mall. Assume the
population is approximately normal.
Step 1: Calculate the sample mean for the given sample data.
Round your answer to two decimal places.
Step 2: Calculate the sample standard deviation for the given...

A nutritionist wants to determine how much time nationally
people spend eating and drinking. Suppose for a random sample of
985 people age 15 or older, the mean amount of time spent eating
or drinking per day is 1.13 hours with a standard deviation of 0.63
hour. Complete parts (a) through (d) below. LOADING... Click the
icon to view the table of critical t-values. (a) A histogram of
time spent eating and drinking each day is skewed right. Use this...

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