2022 chamberlain college of nursing |verified and 100
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Chamberlain College Of Nursing
MATH225 / MATH 225N
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,
, SE 1.897367
z 1.960
Margin of
Error 3.718839
Lower Limit 90.781161
Upper Limit 98.218839
9. In the survey of 603 adults, 98 said that they regularly lie to people conducting surveys. Create a 99%
confidence interval for the proportion of adults who regularly lie to people conducting surveys. Use excel to
create the confidence interval rounding to 4 decimal places.
Lower Limit = 0.1238 Upper Limit = 0.2012
Confidence Level 0.990
n 603
Number of
Successes 98
Sample Proportion 0.162521
SE 0.015024
z 2.576
Margin of Error 0.038702
Lower Limit 0.123819
Upper Limit 0.201222
10. In a random sampling of 350 attendees at a minor league baseball game, 184 said that they bought food from
the concession stand. Create a 95%confidence interval for the proportion of fans who bought food from the
concession stand. Use excel to create the confidence interval rounding to 4 decimal places.
Lower limit = 0.4734 Upper Limit = 0.5780
Confidence Level 0.950
n 350
Number of
Successes 184
Sample Proportion 0.525714
SE 0.026691
z 1.960
Margin of Error 0.052314
Lower Limit 0.473400
Upper Limit 0.578028
11. Suppose that the weight of tight ends in a football league are normally distributed such that sigma squared =
1,369. A sample of 49 tight ends was randomly selected and the weights are given in the table below. Use Excel to
create a 95% confidence interval for the mean weight of the tight ends in this league. Rounding your answers to 2
decimal places and using ascending order. (Have to get square root of 1369 which is 37). Population sample is
yes .
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