Question

**The mayor is interested in finding a 90% confidence
interval for the mean number of pounds of trash per person per week
that is generated in the city. The study included 177 residents
whose mean number of pounds of trash generated per person per week
was 35.4 pounds and the standard deviation was 8.7 pounds. Round
answers to 3 decimal places where possible.**

**If many groups of 177 randomly selected members are
studied, then a different confidence interval would be produced
from each group. What percent of these confidence intervals will
contain the true population mean number of pounds of trash
generated per person per week?**

**If many groups of 177 randomly selected members are
studied, then a different confidence interval would be produced
from each group. What percent of these confidence intervals will
not contain the true population mean number of pounds of trash
generated per person per week?**

Answer #1

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The mayor is interested in finding a 95% confidence interval for
the mean number of pounds of trash per person per week that is
generated in the city. The study included 225 residents whose mean
number of pounds of trash generated per person per week was 37.5
pounds and the standard deviation was 6.6 pounds. Round answers to
3 decimal places where possible.
a. To compute the confidence interval use a t or
z distribution?
b. With 95% confidence the population...

The mayor is interested in finding a 98% confidence interval for
the mean number of pounds of trash per person per week that is
generated in the city. The study included 181 residents whose mean
number of pounds of trash generated per person per week was 36.2
pounds and the standard deviation was 6.9 pounds. Round answers to
3 decimal places where possible.
a. To compute the confidence interval use a ? z
t distribution.
b. With 98% confidence the population...

A fitness center is interested in finding a 90% confidence
interval for the mean number of days per week that Americans who
are members of a fitness club go to their fitness center. Records
of 247 members were looked at and their mean number of visits per
week was 2.1 and the standard deviation was 2.9. Round answers to 3
decimal places where possible.
a. To compute the confidence interval use a ? z or
t distribution.
b. With 90% confidence...

A fitness center is interested in finding a 98% confidence
interval for the mean number of days per week that Americans who
are members of a fitness club go to their fitness center. Records
of 234 members were looked at and their mean number of visits per
week was 2.1 and the standard deviation was 2.7.
a. To compute the confidence interval use a ? t
z distribution.
b. With 98% confidence the population mean number of visits per
week is...

A fitness center is interested in finding a 98% confidence
interval for the mean number of days per week that Americans who
are members of a fitness club go to their fitness center. Records
of 228 members were looked at and their mean number of visits per
week was 2.5 and the standard deviation was 1.9. Round answers to 3
decimal places where possible.
a. To compute the confidence interval use a
? distribution.
b. With 98% confidence, the population mean...

A fitness center is interested in finding a 98% confidence
interval for the mean number of days per week that Americans who
are members of a fitness club go to their fitness center. Records
of 240 members were looked at and their mean number of visits per
week was 3.3 and the standard deviation was 1.8. Round answers to 3
decimal places where possible.
a. To compute the confidence interval use a
distribution.
b. With 98% confidence the population mean...

A fitness center is interested in finding a 95% confidence
interval for the mean number of days per week that Americans who
are members of a fitness club go to their fitness center. Records
of 237 members were looked at and their mean number of visits per
week was 2.5 and the standard deviation was 1.6.
a. To compute the confidence interval use a
distribution.
b. With 95% confidence the population mean number of visits per
week is between answer...

A fitness center is interested in finding a 98% confidence
interval for the mean number of days per week that Americans who
are members of a fitness club go to their fitness center. Records
of 219 members were looked at and their mean number of visits per
week was 2.5 and the standard deviation was 1.8. Round answers to 3
decimal places where possible.
b. With 98% confidence the population mean number of visits per
week is between and visits.
c....

A fitness center is interested in finding a 98%
confidence interval for the mean number of days per week that
Americans who are members of a fitness club go to their fitness
center. Records of 268 members were looked at and their mean number
of visits per week was 2.5 and the standard deviation was 2.9.
Round answers to 3 decimal places where possible.
a. To compute the confidence interval use a ? t
z distribution.
b. With 98% confidence the...

A fitness center is interested in finding a 95% confidence
interval for the mean number of days per week that Americans who
are members of a fitness club go to their fitness center. Records
of 245 members were looked at and their mean number of visits per
week was 2.4 and the standard deviation was 1.6. Round answers to 3
decimal places where possible.
a. To compute the confidence interval use a ? t
z distribution.
b. With 95% confidence the...

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