Please Answer Question 21 (1 point) It is believed that Lake Tahoe Community Col

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Question 21 (1 point) It is believed that Lake Tahoe Community College (LTCC) Intermediate Algebra students get less than seven hours of night, on average. A survey of 22 LTCC Intermediate Algebra studen of 1.93 hours. At a level of significance of 5%, do LTCC Intermediate Algebra students get less than seven night, on average? sleep per s generated a mean of 7.24 hours with a standard deviation hours of sleep per The distribution to be used for this test is X 0 a) t with 22 degrees of freedom 0 b) N(7.24, 1.93/sqrt(22)) O c) t with 21 degrees of freedom O d) N(7.24, 1.93)

Explanation / Answer

Form sample size is less than 30 and Population Standard deviation is unknow then distribution to be used to test for population is  t-distribution with (sample size -1) degrees of freedom

Given ,

sample size : n= 22 (as 22 LTCC intermediate alegbra students were surveyed)

n-1 = 22-1 =21

So, the distribution used for this distribution is t with 21 degrees of freedom.

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