This is statistics for biology majors.

According to the latest nationwide health survey, women between ages 40 and 59 have a mean daily energy intake of 1800 kcal from foods and beverages. An investigator interviewed 16 women in this age range who led physically active lives. The sample mean daily energy intake of these women was 1720 kcal, with a sample standard deviation of 190 kcal. Let be the true mean daily energy intake of all women between ages 40 and 59 who lead physically active lives.

1. State the appropriate null and alternative hypotheses as equations in terms of .
2. Carry out the appropriate analysis using the critical value method at = .05
3. Interpret the result.
4. Based on the answers #1-#3, Is there evidence that is different from 1800 kcal?