Refer to the technology output given to the right that results from measured hemoglobin levels(g/dL) in 100

100 randomly selected adult females. The confidence level of 95

95% was used.

a. Express the confidence interval in the format that uses the"less than" symbol. Assume that the original listed data use two decimalplaces, and round the confidence interval limits accordingly.

b. Identify the best point estimate of mu

and the margin of error.

c. In constructing the confidence interval estimate of mu

, why is it not necessary to confirm that the sample data appear to be from a population with a normaldistribution?

TInterval

left parenthesis 13.099 comma 13.687 right parenthesis

(13.099,13.687)

x overbar

xequals

=13.393

13.393

Sxequals

=1.481

1.481

nequals

=100

100

a. Express the confidence interval in the format that uses the"less than" symbol. Assume that the original listed data use two decimalplaces, and round the confidence interval limits accordingly.

nothing

g/dLless than

<

less than

<

nothing

g/dL

(Round to three decimal places asneeded.)