Use the critical value approach

Reference no: EM13187241

A random sample of 16 students showed aht the variance in the number of hours they spend studying for a final exam was 25 hours^2.

a. Construct a 95% confidence interval for the population variance and standard deviation of hours spent studying. Assume the population of hours spent studying is normally distributed.

b. Test, at the 5% level of significance, whether the population standard deviation of hours spent studying is less than 10. Use the Critical value approach.

Reference no: EM13187241

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