Students who get more sleep get better grades. You want to estimate the hours of sleep...

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Students who get more sleep get better grades. You want to estimate the hours of sleep...

Students who get more sleep get better grades. You want to estimate the hours of sleep per night that a college student gets. You select 29 students; on average they slept 6.2 hours with a standard deviation of 1.8 hours.

Should a z-distribution or t-distribution be used in the analysis?

math Statistics-And-Probability

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Answer 1

Answer #1

Solution :

Given that ,

= 6.2

s = 1.8

n = 29

Here we use t-distribution because n < 30 and sample standard deviation is given .

t-distribution be used in the analysis .

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Answer 2

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