Question

Application Exercise:

In a fast food company, all male employees with 3 to 5 years of
experience have an average salary of $27900 with a with a standard
deviation of $5090. A random sample of 27 female employees also
having 3 to 5 years of experience had an average salary of $27200.
The company accountant suspects a different in salary practices for
males and females. What can be concluded with an *α* of
0.10?

**a)** What is the appropriate test statistic?

---Select--- na z-test one-sample t-test independent-samples t-test
related-samples t-test

**b)**

Population:

---Select--- fast food company the CEO male employees salary female
employees

Sample:

---Select--- fast food company the CEO male employees salary female
employees

**c)** Obtain/compute the appropriate values to make a
decision about *H*_{0}.

(Hint: Make sure to write down the null and alternative hypotheses
to help solve the problem.)

critical value = ; test statistic =

Decision: ---Select--- Reject H0 Fail to reject H0

**d)** If appropriate, compute the CI. If not
appropriate, input "na" for both spaces below.

[ , ]

**e)** Compute the corresponding effect size(s) and
indicate magnitude(s).

If not appropriate, input and select "na" below.

*d* = ; ---Select--- na trivial effect small
effect medium effect large effect

*r*^{2} = ; ---Select--- na trivial
effect small effect medium effect large effect

**f)** Make an interpretation based on the
results.

The salary of male employees is significantly lower than female employees.

The salary of male employees is significantly higher than female employees.

The salary of male employees did not differ from female employees.

Answer #1

**a)**

z-test

**b)**

Population:

male employees

Sample:

female employees

**c)**

critical value = 1.645; test statistic = -0.715

Decision: Fail to reject H0

**d)**

[ 25588.75 , 28811.25 ]

**e)** Compute the corresponding effect size(s) and
indicate magnitude(s).

If not appropriate, input and select "na" below.

*d* = 0.138 ; trivial effect

*r*2 = ; na

**f)** Make an interpretation based on the
results.

The salary of male employees did not differ from female employees.

27,200.00 | mean 1 |

5,090.00 | std. dev. |

979.57 | std. error |

27 | n |

0.138 | |

-0.715 | z |

.4749 | p-value (two-tailed) |

25,588.75 | confidence interval 90.% lower |

28,811.25 | confidence interval 90.% upper |

1,611.25 | margin of error |

Application Exercise:
A physician hypothesizes that males have higher systolic blood
pressure than females. The physician obtains a sample of patients
and measures their blood pressures during their regular check-up.
Below is the systolic blood pressure for the sample. What can the
physician conclude with α = 0.01?
male
female
106
119
98
105
100
132
109
113
98
105
137
115
119
115
127
122
131
124
111
136
a) What is the appropriate test statistic?
---Select--- na z-test...

A human resource (HR) manager wants to see if employees of the
company are experiencing burnout. The HR manager knows that burnout
in the general population is defined at 89, and obtains a random
sample of employees from the company who fill out a burnout
questionnaire. What can the HR manager conclude with α = 0.05? The
data are below.
id
burnout
2
6
8
1
3
4
5
7
11
21
19
15
45
33
24
46
30
47...

Use SPSS for this Application Exercise:
An educational psychologist hypothesizes that mnemonics can be
detrimental to memory. To test this the psychologist designs a
study where participants are randomly assigned to a mnemonic method
or not. However, before the participants are assigned they are
paired for vocabulary knowledge. All the participants are then
asked to read a passage from a book. A few days later, the
participants are asked to reproduce the passage. Below are the
number of correctly recalled...

Use SPSS for this Application Exercise:
As part of a study of wheat maturation, an agronomist selected a
sample of wheat plants at random from a field plot. For each plant,
the agronomist measured the moisture content from two locations:
one from the central portion and one from the top portion of the
wheat head. The agronomist hypothesizes that the central portion of
the wheat head has more moisture than the top portion. What can the
agronomist conclude with α...

A doctor hypothesizes that females have higher systolic blood
pressure than males. The doctor obtains the blood pressure from a
sample of patients during their annual check-up. Below is the
systolic blood pressure for the sample. What can be concluded with
α = 0.05?
male
female
106
119
98
105
100
132
109
113
98
105
137
105
119
115
127
122
131
124
111
136
a) What is the appropriate test statistic?
---Select--- na z-test One-Sample t-test Independent-Samples t-test...

Vita Pills were advertised as having 751 mg of vitamin B3 per
pill. A marketing firm hypothesizes that the amount of vitamin B3
is less than what is advertised. What can be concluded with α =
0.10. The vitamin B3 content per pill from a sample of pills is as
follows:
713, 761, 716, 721, 751, 721, 711, 741.
a) What is the appropriate test statistic?
---Select--- na z-test One-Sample t-test Independent-Samples t-test
Related-Samples t-test
b)
Population:
---Select--- sample of...

Generally, the average typing speed is 56 words per minute (wp).
A professor wanted to see where his students stand compared to the
population. He tested 24 of his students and obtained the following
estimates: an average typing speed of 58 with a variance of 361.00.
What can the professor conclude with α = 0.01?
a) What is the appropriate test statistic?
---Select--- na z-test One-Sample t-test Independent-Samples t-test
Related-Samples t-test
Also state population and sample from choices below
Population:...

The mean height of adult males in the U.S is about 68.2" with a
variance of 16.00". Suppose the mean height of a sample of 30
mentally disabled males was found to be 69.6". Researchers want to
know if the height of mentally disabled males differs from the
population. What can be concluded with α = 0.01?
a) What is the appropriate test statistic?
---Select from the options--- na z-test, one-sample t-test,
independent-samples t-test, related-samples t-test
b)
Population:
---Select from...

Dr. Yan predicts that a novel antidepressant drug improves
cognition. To examine this, the drug is administered to a random
sample of 28 trained rats. The rats were then placed in a maze and
timed on how long it took them to complete it. The average
completion time was 48 seconds. Normal rats have an average
completion time of 44 seconds with a variance of 100.00 seconds.
What can be concluded with an α of 0.10? )
What is the...

Boys of a certain age in the nation have an average weight of 86
with a standard deviation of 9.6 lb. A complaint is made that boys
are overfed in a municipal children's home. As evidence, a sample
of 29 boys of the given age is taken from the children's home with
an average weight of 85.14 lb. What can be concluded with α =
0.01?
a) What is the appropriate test statistic?
---Select--- na z-test One-Sample t-test Independent-Samples t-test...

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