Question
In: Statistics and Probability
A history teacher believes that students in an afternoon class score higher than the students in...
A history teacher believes that students in an afternoon class score higher than the students in a morning class. The results of a special exam are shown below. Can the teacher conclude that the afternoon students have a higher score? Use α = 0.01. Morning Students Afternoon Students
n1 = 36 n2 = 41 x1= 83
x2 = 86 s1 = 5.8 s2 = 6.3
null hypothesis
and t statistic , p value
Solutions
orchestra answered 1 year agoRelated Solutions
A history teacher believes that students in an afternoon class have a higher mean score than...
A history teacher believes that students in an afternoon class
have a higher mean score than the students in a morning class. The
teacher randomly selected 41 students from her afternoon class and
found that the mean score was a 99 with standard deviation of 6.3.
The teacher randomly selected 36 students from her morning class
and found that the mean score was a 96 with a standard deviation of
5.8. Can the teacher conclude that the afternoon students have...
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The council of higher education wants to compare the percentage of students that score A in...
The council of higher education wants to compare the percentage
of students that score A in two universities. In a random sample of
50 students from university one, 16 received a grade of A; and in a
random sample of 40 students from university two, 8 received a
grade of A. The 95% confidence interval for the difference in the
proportion of students who received a grade of A is:
a. -0.0638 to 0.3038
b. -0.0691 to 0.2983
c. 0.0365...
A teacher believes that the third homework assignment is a key predictor in how well students...
A teacher believes
that the third homework assignment is a key predictor in how well
students will do on the test. Let x represent the third homework
score and y the test score. A random sample of last terms students
were selected and their grades are shown below. Assume scores are
normally distributed.
HW3
term
13.3
59.811
21.9
87.539
9.7
53.728
25
96.283
5.4
39.174
13.2
66.092
20.9
89.729
18.5
78.985
20
86.2
15.4
73.274
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93.25
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52.257
6.4...
A teacher believes that the third homework assignment is a key predictor in how well students...
A teacher believes that the third homework assignment is a key
predictor in how well students will do on the test. Let x represent
the third homework score and y the test score. A random sample of
last terms students were selected and their grades are shown below.
Assume scores are normally distributed.
HW3
Test
13.3
59.811
21.9
87.539
9.7
53.728
25
96.283
5.4
39.174
13.2
66.092
20.9
89.729
18.5
78.985
20
86.2
15.4
73.274
25
93.25
9.7
52.257
6.4...
A teacher believes that the third homework assignment is a key predictor in how well students...
A teacher believes that the third homework assignment is a key
predictor in how well students will do on the midterm. Let x
represent the third homework score and y the midterm exam score. A
random sample of last terms students were selected and their grades
are shown below. Assume scores are normally distributed.
HW3
Midterm
13.3
59.811
21.9
87.539
9.7
53.728
25
96.283
5.4
39.174
13.2
66.092
20.9
89.729
18.5
78.985
20
86.2
15.4
73.274
25
93.25
9.7
52.257...
A teacher believes that the third homework assignment is a key predictor in how well students...
A teacher believes that the third homework assignment is a key
predictor in how well students will do on the midterm. Let x
represent the third homework score and y the midterm exam score. A
random sample of last terms students were selected and their grades
are shown below. Assume scores are normally distributed.
HW3
Midterm
13.3
59.811
21.9
87.539
9.7
53.728
25
96.283
5.4
39.174
13.2
66.092
20.9
89.729
18.5
78.985
20
86.2
15.4
73.274
25
93.25
9.7
52.257...
A statistics teacher believes that the final exam grades for her business statistics class have a...
A statistics teacher believes that the final exam grades for her
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(2)
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of scores an A. Will a student who scored a 90 on the exam receive
an A? Explain.
(3)...
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