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Limit for the population

In a sample of 55 mice, a biologist found that 42% were able to run a maze in 30 seconds or less. Find the 90% limit for the population proportion of mice who can run a maze in 30 seconds or less.

a. 36.5% < p < 47.5%

b. 33.5% < p < 50.5%

c. 31.0% < p < 53.0%

d. 25.5% < p < 58.5%

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## Q : Range for the true

With 90% confidence levels, determine wheter the two samples are statistically the same or different. Find the range for the true(or population) mean for each set with 90% confidence levels.