You conduct a survey to measure the mean
household income for the city of Hays, Kansas. You survey 500
random residents and ask them to report their total household
income for 2008. In analyzing the data, you find that the
mean annual household income for the sample was $47,300. The
standard deviation of this distribution is $9500. What is the
95% confidence interval for the mean annual household income of all
residents of Hays?
$42,578 to
$52,377
$46,467 to $48,133
$45,225 to $47,746
$44,775 to $46,464
You conduct a survey to measure the mean
household income for the city of Hays, Kansas. You survey 500
random residents and ask them to report their total household
income for 2008. In analyzing the data, you find that the
mean annual household income for the sample was $47,300. The
standard deviation of this distribution is $9500. What is the
99% confidence interval for the mean annual household income of all
residents of Hays?
$45,002 to 47,093
$45,364 to $47,385
$45,805 to $47,888
$46,208 to $48,392
A random sample of 226 fish caught out of
Cedar Bluff lake was weighed. The mean weight of the sample
of fish was 4.67 lbs. The standard deviation of the
distribution was .7 lbs. What would be the 95% confidence
interval for the mean weight of the fish in Cedar Bluff Lake?
4.157 lbs. to 4.406
lbs.
4.251 lbs. to 4.475
lbs.
4.452 lbs. to 4.693
lbs.
4.597 lbs to 4.761
lbs
