Makakuha ng eksaktong mga sagot sa iyong mga tanong sa IDNStudy.com. Sumali sa aming platform ng tanong at sagot upang makatanggap ng mabilis at eksaktong tugon mula sa mga propesyonal sa iba't ibang larangan.

A university dean of students wishes to estimate the average number of hours students spends doing homework per week. The standard deviation from a previous study is 6.2 hours. How large a sample must be selected if he wants 99% Confidence Interval of finding when the true mean differs from the sample mean 1.5 hours?

Sagot :

Answer:

Standard deviation,

Standard deviation, σ

Standard deviation, σ=

Standard deviation, σ=6.2

Level of significamce,

Level of significamce, α

Level of significamce, α=

Level of significamce, α=0.01

Margin of error,

Margin of error, M

Margin of error, ME

Margin of error, ME=

Margin of error, ME=1.5