A physical fitness trainer has several workouts she developed for increasing female upper body strength. All the workout plans are created based on the average adult women’s bench press ability.  The average adult woman can bench 115 lbs. with a standard deviation of 18 pounds.  The trainer has a class of 14 females and does an initial test to see if the women are representative of the average female population.                         Data    Female Class     Bench Ability (lbs.) 1 130 2 100 3 99 4 114 5 130 6 97 7 114 8 135 9 128 10 128 11 116 12 141 13 113 14 116 Write the null and alternative hypothesis in statistical form: Determine the mean for the sample: Apply the z-test formula Zobt = Is this a one-tailed (directional test) or a two-tailed (non-directional test)?   What is your alpha level set to?   α =  Label the critical value(s) and indicate the position of the Zobt on the distribution Write the z result in the correct form:

A physical fitness trainer has several workouts she developed for increasing female upper body strength. All the workout plans are created based on the average adult women’s bench press ability.  The average adult woman can bench 115 lbs. with a standard deviation of 18 pounds.  The trainer has a class of 14 females and does an initial test to see if the women are representative of the average female population.

                        Data

   Female Class     Bench Ability (lbs.)

1

130

2

100

3

99

4

114

5

130

6

97

7

114

8

135

9

128

10

128

11

116

12

141

13

113

14

116

Write the null and alternative hypothesis in statistical form:

Determine the mean for the sample:

Apply the z-test formula

Zobt =

Is this a one-tailed (directional test) or a two-tailed (non-directional test)?  

What is your alpha level set to?   α = 

Label the critical value(s) and indicate the position of the Zobt on the distribution

Write the z result in the correct form:

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