Consider the following random sample of diameter measurements (in inches) of

11

softballs.

4.75

,

4.76

,

4.8

,

4.75

,

4.88

,

4.86

,

4.79

,

4.82

,

4.7

,

4.84

,

4.69

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If we assume that the diameter measurements are normally distributed, find a

95%

confidence interval for the mean diameter of a softball. Then find the lower limit and upper limit of the

95%

confidence interval.

Carry your intermediate computations to at least three decimal places. Round your answers to two decimal places. (If necessary, consult a list of formulas.)

Lower limit:
Upper limit: