Question

1. A psychologist was interested in the effect of Vitamin A deficiency on maze learning rats. A group of nine rats learned a simple maze. Next, these same rats were deprived of Vitamin A for six weeks and were then tested again on their ability to learn a second maze equal in difficulty to the first. The scores represent the number of maze errors made under the two treatment conditions.

Pre-test |
Post-test |

17 |
13 |

18 |
23 |

19 |
18 |

10 |
19 |

22 |
22 |

21 |
26 |

15 |
18 |

18 |
13 |

19 |
29 |

Perform an appropriate two-tailed test of the significance of the mean difference.

Hypotheses:

t
_{obs}=

t_{crit}=

df =

Mean difference =

Experimental conclusion (Write out):

Find the 95% CI for this data:

2. A researcher wanted to determine the extent to which Tylenol PM influenced people’s reaction times. He had 10 participants complete a reaction time measure (higher scores mean slower responses) before taking Tylenol PM and then again one hour after they had taken the drug. Was there a significantly difference in their reaction time?

Pre Test |
Post Test |

100 |
125 |

78 |
85 |

89 |
90 |

110 |
150 |

80 |
90 |

95 |
99 |

87 |
87 |

100 |
150 |

75 |
80 |

88 |
100 |

Perform an appropriate two-tailed test of the significance of the mean difference.

Hypotheses:

t
_{obs}=

t_{crit}=

df =

Mean difference =

Experimental conclusion (Write out):

Find the 95% CI for this data:

Answer #1

1. A psychologist was interested in the effect of Vitamin A
deficiency on maze learning rats. A group of nine rats learned a
simple maze. Next, these same rats were deprived of Vitamin A for
six weeks and were then tested again on their ability to learn a
second maze equal in difficulty to the first. The scores represent
the number of maze errors made under the two treatment
conditions.
Pre-test
Post-test
17
13
18
23
19
18
10
19...

A psychologist is interested in the
effect of CBT in patients admitted to a psychiatric hospital for
schizophrenia. Below, these data were collected from 8 patients.
The scores are a sum of delusional thoughts before and after CBT;
lower scores indicate that less delusional thoughts were reported.
Using a 0.05 level of significance to test whether CBT was
successful as a treatment.
Patient
Pre CBT
Post CBT
1
31
24
2
29
25
3
22
20
4
26
25
5...

1.) One tailed test or two tailed test?
You are performing a hypothesis test for the mean sample weight
of your fellow Intro to Statistics students. For your null
hypothesis , the hypothesized mean weight for the entire campus
student body is 165. You have no reason to know for your
alternative hypothesis whether the actual mean weight for the
entire student campus body is more or less than 165. So you decide
to make your alternative hypothesis as not...

PUBH 6033—Week 7 Assignment 1
Comparing two means: When drink drove a student to
statistics
(Rubric included)
Instructions
For this assignment, you review this week’s Learning Resources
and then perform a two-sample independent t test and an ANOVA
related to the dataset that was utilized in the week 2 SPSS
application assignment. Import the data into SPSS; or, if you
correctly saved the data file in Week 2, you may open and use that
saved file to complete this...

PUBH 6033—Week 7 Assignment 1
Comparing two means: When drink drove a student to
statistics
(Rubric included)
Instructions
For this assignment, you review this week’s Learning Resources
and then perform a two-sample independent t test and an ANOVA
related to the dataset that was utilized in the week 2 SPSS
application assignment. Import the data into SPSS; or, if you
correctly saved the data file in Week 2, you may open and use that
saved file to complete this assignment....

MATHEMATICS
1. The measure of location which is the most likely to
be
influenced by extreme values in the data set is the a. range
b.
median c. mode d. mean
2. If two events are independent, then a. they must be
mutually
exclusive b. the sum of their probabilities must be equal to one
c.
their intersection must be zero d. None of these alternatives
is
correct. any value between 0 to 1
3. Two events, A and B,...

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