In the following three scenario which test would be most appropriate to use? a.F

Question

In the following three scenario which test would be most appropriate to use?

a.Fell running, a popular sport in England, involves running long distances over mountainous terrain. The times for 28 female runners to complete a particular 10-mile course are recorded (in minutes) along with the amount of time each runner had spent training for the race in the month prior to the race (in hours). We would like to determine if there is an association between time to complete the race and time training.

b. On April 24, 2013 the BBC reported "Menus displaying the exercise needed to burn calories in meals can help people consume less, a US study suggests." Three hundred study volunteers were randomized to receive a menu containing calorie information of the meals or a menu containing both calorie information and the amount of exercise needed to burn off the calories. The researchers compared the number of calories ordered in the two groups. The group given the extra information regarding exercise consumed 100 fewer calories, on average, as a result. Which test did the researchers perform?

c.Research has shown that the average life expectancy of US adult is 72 years. Researchers suspect that life expectancy may differ in Mediterranean countries due to differences in diet. We gather data from 500 randomly selected Italian obituaries, and find that the average age at the time of death is 68 years old. We would like to determine if the average life expectancy among Italians differs from that of the US.

Explanation / Answer

c.Research has shown that the average life expectancy of US adult is 72 years. Researchers suspect that life expectancy may differ in Mediterranean countries due to differences in diet. We gather data from 500 randomly selected Italian obituaries, and find that the average age at the time of death is 68 years old. We would like to determine if the average life expectancy among Italians differs from that of the US.

As) we use independent t test

b)On April 24, 2013 the BBC reported "Menus displaying the exercise needed to burn calories in meals can help people consume less, a US study suggests." Three hundred study volunteers were randomized to receive a menu containing calorie information of the meals or a menu containing both calorie information and the amount of exercise needed to burn off the calories. The researchers compared the number of calories ordered in the two groups. The group given the extra information regarding exercise consumed 100 fewer calories, on average, as a result. Which test did the researchers perform?

Ans)paired t test

a) Fell running, a popular sport in England, involves running long distances over mountainous terrain. The times for 28 female runners to complete a particular 10-mile course are recorded (in minutes) along with the amount of time each runner had spent training for the race in the month prior to the race (in hours). We would like to determine if there is an association between time to complete the race and time training.

Ans)Regression

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