Question

Do men score lower on average compared to women on their statistics finals? Final exam scores of ten randomly selected male statistics students and ten randomly selected female statistics students are shown below.

**Male:** 65 69 91 56 85 82 59 92 81
78

**Female:** 71 85 99 69 99 65 86 79 64
98

Assume both follow a Normal distribution. What can be concluded at the the αα = 0.01 level of significance level of significance?

For this study, we should use Select an answer z-test for a population proportion z-test for the difference between two population proportions t-test for the difference between two dependent population means t-test for a population mean t-test for the difference between two independent population means

- The null and alternative hypotheses would be:

H0:H0: Select an answer μ1 p1 ? > < = ≠ Select an answer μ2 p2 (please enter a decimal)

H1:H1: Select an answer p1 μ1 ? = > < ≠ Select an answer μ2 p2 (Please enter a decimal)

- The test statistic ? z t = (please show your answer to 3 decimal places.)
- The p-value = (Please show your answer to 4 decimal places.)
- The p-value is ? ≤ > αα
- Based on this, we should Select an answer reject fail to reject accept the null hypothesis.

Answer #1

Are blonde female college students just as likely to have
boyfriends as brunette female college students? 402 of the 657
blondes surveyed had boyfriends and 493 of the 766 brunettes
surveyed had boyfriends. What can be concluded at the αα= 0.01
level of significance?
For this study, we should use Select an answer z-test for a
population proportion t-test for the difference between two
independent population means t-test for the difference between two
dependent population means z-test for the difference...

Start of Questions
The director of student services at Oxnard College is interested
in whether women are more likely to attend orientation than men
before they begin their coursework. A random sample of freshmen at
Oxnard College were asked what their gender is and whether they
attended orientation. The results of the survey are shown
below:
Data for Gender vs. Orientation
Attendance
Women
Men
Yes
468
493
No
203
286
What can be concluded at the αα = 0.01 level...

Do left handed starting pitchers pitch more innings per game on
average than right handed starting pitchers? A researcher looked at
eleven randomly selected left handed starting pitchers' games and
nine randomly selected right handed pitchers' games. The table
below shows the results.
Left: 4 5 7 7 6 7 6 7 7 6
Right: 5 5 5 5 7 6 6 6
Assume that both populations follow a normal distribution. What
can be concluded at the the αα = 0.10 level...

Do college students enjoy playing sports less than watching
sports? A researcher randomly selected ten college students and
asked them to rate playing sports and watching sports on a scale
from 1 to 10 with 1 meaning they have no interest and 10 meaning
they absolutely love it. The results of the study are shown
below.
Playing Vs. Watching Sports
Play
6
2
4
7
5
10
5
1
7
9
Watch
5
3
6
6
6
10
7
2...

Is the proportion of wildfires caused by humans in the south
lower than the proportion of wildfires caused by humans in the
west? 372 of the 502 randomly selected wildfires looked at in the
south were caused by humans while 395 of the 510 randomly selected
wildfires looked at the west were caused by humans. What can be
concluded at the = 0.10 level of significance?
For this study, we should use
t-test for a population, mean t-test for the difference...

Is the average time to complete an obstacle course shorter when
a patch is placed over the right eye than when a patch is placed
over the left eye? Thirteen randomly selected volunteers first
completed an obstacle course with a patch over one eye and then
completed an equally difficult obstacle course with a patch over
the other eye. The completion times are shown below. "Left" means
the patch was placed over the left eye and "Right" means the patch...

A sample of scores for men and women from an examination in
Statistics 201 were:
Men
62
91
92
77
69
86
64
60
94
Women
51
79
62
88
80
50
87
65
Given that the null hypothesis and the alternative hypothesis
are:
H0: μm -
μw = -5
H1: μm - μw ≠
-5
and using a 0.05 significance level conduct a t-test
about a difference in population means:
a)
What is the correct decision rule?
Reject H0...

1.
The average final exam score for the statistics course is 78%. A
professor wants to see if the average final exam score for students
who are given colored pens on the first day of class is different.
The final exam scores for the 11 randomly selected students who
were given the colored pens are shown below. Assume that the
distribution of the population is normal.
77, 58, 53, 90, 83, 77, 51, 72, 53, 68, 81
What can be...

A sample of scores for men and women from an examination in
Statistics 201 were:
Men
78
69
45
81
72
82
84
46
58
Women
67
49
88
59
80
73
91
61
45
Given that the null hypothesis and the alternative hypothesis
are:
H0: μm -
μw ≤ 3
H1: μm - μw
> 3
and using a 0.025 significance level conduct a t-test
about a difference in population means:
a)
What is the correct decision rule?
Reject...

Is the average time to complete an obstacle course longer when a
patch is placed over the right eye than when a patch is placed over
the left eye? Thirteen randomly selected volunteers first completed
an obstacle course with a patch over one eye and then completed an
equally difficult obstacle course with a patch over the other eye.
The completion times are shown below. "Left" means the patch was
placed over the left eye and "Right" means the patch...

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