Question

Create a null hypothesis and a directional experimental hypothesis for minutes of exercise.

Create a null hypothesis and a non-directional experimental hypothesis for cigarettes smoke daily, alcohol beverages and daily calories.

Should we conduct a one or two tailed?

Participants	Minutes of exercise	Daily calories	Cigarettes smoked daily	Alcohol beverages
1	30	2000	0	2
2	0	3000	5	4
3	120	1500	0	0
4	150	1800	10	14
5	0	3200	0	5
6	150	1600	20	35
7	180	3100	8	25
8	120	2500	25	10
9	60	2500	0	0
10	45	1900	30	15
11	200	1500	15	6
12	190	2900	12	12
13	170	3900	6	20
14	150	2500	4	0
15	300	3400	9	1
16	175	4000	16	8
17	220	4200	18	9
18	240	2500	11	0
19	210	2700	2	13
20	250	3030	17	16

Answer 1

Create a null hypothesis and a directional experimental hypothesis for minutes of exercise.

The hypothesis being tested is:

H₀: µ = 150 minutes

H_a: µ > 150 minutes

Or

The hypothesis being tested is:

H₀: µ = 150 minutes

H_a: µ < 150 minutes

Create a null hypothesis and a non-directional experimental hypothesis for cigarettes smoke daily, alcohol beverages and daily calories.

For cigarettes smoke daily:

The hypothesis being tested is:

H₀: µ = 10

H_a: µ ≠ 10

For alcohol beverages:

The hypothesis being tested is:

H₀: µ = 10

H_a: µ ≠ 10

For daily calories:

The hypothesis being tested is:

H₀: µ = 2700

H_a: µ ≠ 2700

Should we conduct a one or two tailed?

Two-tailed test.