Question: For a data set obtained from a sample, n = 144 andx- = 47.75. It is known that = 5.0. (a) What is the point

For a data set obtained from a sample,n= 144 andx-

= 47.75. It is known that= 5.0.

(a)What is the point estimate of?

=

(b)Findcorresponding to a 95% confidence level.

=

(c)Find 1 /2.

1 /2 =

(d)Find to 2 decimal placesz/2for 95% confidence level.

z/2=

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