Beginning students in accounting took a test and a computer anxiety score (CARS) was assigned to each student on the basis of their answers to nineteen questions on the test (see Table D.4 of the Data Bank). A small population standard deviation would indicate that computer anxiety is nearly the same for all female beginning accounting students.
The scores for 15 female students are

Assuming that the distribution of scores of all college students can be modeled as a normal distribution
(a) Obtain a point estimate of the population standard deviation σ.
(b) Construct a 95% confidence interval for σ.
(c) Examine whether or not your point estimate is located at the center of the confidence interval.

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2.90 1.00 1.90 2.37 3.32 3.79 3.26 1.90 1.84 2.58 1.58 2.90 2.42 3.42 2.53