Question
In: Statistics and Probability
10. Ms. McNicholas wants to see if there is any difference in the Final Exam scores...
10. Ms. McNicholas wants to see if there is any difference in the Final Exam scores of her two Statistics classes. Class I 81 73 86 90 75 80 75 80 75 81 85 87 83 75 70 65 80 76 64 74 86 80 83 67 82 78 76 83 71 90 77 81 82 Class II 87 77 66 75 78 82 82 71 79 91 97 89 92 75 89 75 95 84 75 82 74 77 87 69 96 65 a) Find the five-number summary for each class. b) Construct a boxplot for each class. c) Determine the range for outliers on each graph. d) Is there a difference in the performance of the two classes?
Solutions
orchestra answered 1 year agoRelated Solutions
A sample of 10 students record their scores on the final exam for their statistics class....
A sample of 10 students record their scores on the final exam
for their statistics class. The mean of the sample is 81 with
sample standard deviation 7 points. Analysis of the 10 sample
values indicated that the population is approximately normal. We
wish to find the 95% confidence interval for the population mean
test scores.
1. What is the confidence level, c?
2. Which of the following is correct?
a. To find the confidence interval, a z-critical value should...
The average final exam score for the statistics course is 76%. A professor wants to see...
The average final exam score for the statistics course is 76%. 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 higher. The
final exam scores for the 16 randomly selected students who were
given the colored pens are shown below. Assume that the
distribution of the population is normal.
86, 97, 69, 93, 85, 88, 99, 67, 91, 85, 73, 66, 100, 90, 71,...
The average final exam score for the statistics course is 74%. A professor wants to see...
The average final exam score for the statistics course is 74%. 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 lower. The
final exam scores for the 12 randomly selected students who were
given the colored pens are shown below. Assume that the
distribution of the population is normal.
79, 60, 52, 72, 67, 47, 54, 79, 61, 80, 80, 47
What can be...
The average final exam score for the statistics course is 78%. A professor wants to see...
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. 81, 61, 81, 91, 84, 56,
64, 74, 79, 63, 82 What can be concluded...
for a final exam in statistics , the mean of the exam scores is u= 75...
for
a final exam in statistics , the mean of the exam scores is u= 75
with a standard deviation of o=8. what sample mean marks the top
10% of this distribution for a samples of n= 25
b) what sample means mark the boundaries of the middle 50% for
samples of n= 50
The data below are the final exam scores of 10 randomly selected calculus students and the...
The data below are the final exam scores of 10 randomly selected
calculus students and the number of hours they slept the night
before the exam:
Hours Slept (x)
7
11
6
13
7
8
8
11
12
9
Exam Scores (y)
68
83
63
91
69
81
88
93
93
74
Using the equation of the regression line, with all numbers in
it rounded to 2 decimal places, predict the final exam score of a
student who slept for...
An investigator collected data on midterm exam scores and final exam scores of elementary school students;...
An investigator collected data on midterm exam scores and
final exam scores of elementary school students; results can
summarized as follows.
Average SD
--------------------------------------------------
Boys' midterm score 70 20
Boys' final score 65 23
girls' midterm score 75 20
girls' final score 80 23
The correlation coefficient between midterm score and final
score for the boys was about 0.70; for the girls, it was about the
same. If you take the boys and the girls together, the correlation
between midterm...
A statistics teacher wants to see if there is any difference in the abilities of students...
A statistics teacher wants to see if there is any difference in
the abilities of students enrolled in statistics today and those
enrolled five years ago. A sample of final examination scores from
students enrolled today and from students enrolled five years ago
was taken. You are given the following information. Today
(Population 1) Five Years Ago (Population 2) Sample Mean 84 89
Sample Variance 112.5 54 Sample Size 45 36 The 92.50% confidence
interval for the difference between the...
A statistics teacher wants to see if there is any difference in the abilities of students...
A statistics teacher wants to see if there is any difference in
the abilities of students enrolled in statistics today and those
enrolled five years ago. A sample of final examination scores from
students enrolled today and from students enrolled five years ago
was taken. You are given the following information. Today Five
Years Ago x̄ 82 88 σ2 112.5 54 n 45 36
The 95% confidence interval for the difference between the two
population means is
a. -3.08 to...
A statistics teacher wants to see if there is any difference in the abilities of students...
A statistics teacher wants to see if there is any difference in
the abilities of students enrolled in statistics today and those
enrolled five years ago. A sample of final examination scores from
students enrolled today and from students enrolled five years ago
was taken. You are given the following information.
today (population 1) Five years ago (population 2)
sample mean 86 88
sample variance 112.5 54
sample size 45 36
The 92.50% confidence interval for the difference between the...
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