Question

Weights, in pounds, of ten-year-old girls are collected from a neighborhood. A sample of 16 weights is given below. Assuming normality, use a TI-83, TI-83 plus, or TI-84 calculator to find the 98% confidence interval for the population mean weight μ. Round your answers to one decimal place and use increasing order.

Weight
94.0
44.4
71.4
54.3
96.0
75.3
77.9
80.1
67.5
80.4
77.3
66.0
92.0
73.6
66.1
65.1

Answer 1

The statistical software output for this problem is:

One sample T confidence interval:

μ : Mean of variable

98% confidence interval results:

Variable	Sample Mean	Std. Err.	DF	L. Limit	U. Limit
Data	73.8375	3.435463	15	64.896775	82.778225

Hence,

98% confidence interval will be:

(64.9, 82.8)