Question

john has collected a sample of variable X in the following table: 32 52 36 26...

john has collected a sample of variable X in the following table:

32

52

36

26

43

23

25

26

14

38

27

19

14

35

Assume X follows a normal distribution with an unknown mean and standard deviation. Peter would like to calculate the 98% confidence interval, which allows him to do a two-tailed t-test to examine whether the mean of X is different from 30.

What is the critical t-value for this confidence interval?

What is the value of the standard error for this confidence interval?

Math   Statistics-And-Probability   
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calculate mean ans standard deviation for the sample data given,

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