Question
In: Statistics and Probability
Test for Correlation - Download the data set “Course Evaluations” in your preferred technology format (StatCrunch,...
Test for Correlation - Download the data set “Course Evaluations” in your preferred technology format (StatCrunch, Statdisk, Excel). Column 2 denotes the mean course rating, and Column 3 denotes the mean professor rating. Using your preferred technology format (StatCrunch, Statdisk, Excel), generate a scatterplot for these two data sets. Based on the graph, do you believe the two sets are correlated?
Now, using the same program, complete a hypothesis test to test the claim that the course rating and the professor rating are correlated. Provide a printout of your technology output using the Insert/Edit Image feature (no attachments!) Explain your conclusion in statistical and non-statistical terms and how you arrived at that conclusion. Be sure to follow the 8-step procedure on page 360, using technology to do your calculations. You should include your null and alternative hypothesis (in English and in symbolic form), your significance level, whether you are conducting a right tailed, left tailed, or two tailed test, r-value, p-value, and conclusions.
Course Evaluations_Excel(1).xlsx
Solutions
orchestra answered 1 year agoRelated Solutions
Using your preferred technology format (StatCrunch, Statdisk, Excel), generate a scatterplot for these two data sets....
Using your preferred
technology format (StatCrunch, Statdisk, Excel), generate a
scatterplot for these two data sets. Based on the graph, do you
believe the two sets are correlated?
Now, complete a
hypothesis test to test the claim that the course rating and the
professor rating are correlated. Explain your conclusion in
statistical and non-statistical terms and how you arrived at that
conclusion. You should include your null and alternative hypothesis
(in English and in symbolic form), your significance level, whether...
A data set includes data from student evaluations of courses.
A data set includes data from student evaluations of courses. The summary statistics are n = 89, x̅= 3.34, s=0.51. Use a 0.10 significance level to test the claim that the population of student course evaluations has a mean equal to 3.50. Assume that a simple random sample has been selected. Identify the null and alternative hypotheses, test statistic, P-value, and state the final conclusion that addresses the original claimWhat are the null and alternative hypotheses?Determine the test statistic (Round...
Is there a correlation between mean course grade and mean attendance in data set 7176? What...
Is there a correlation between mean course grade and mean
attendance in data set 7176? What is the equation of the regression
line? What is the best prediction for a mean attendance of 80%?
Class 7176
Unit Test 3
Course Grade
Attendance
238
63
96
208
55
48
258
89
96
264
84
96
324
98
100
0
62
44
0
56
66
274
87
96
274
83
96
0
0
18
179
71
100
268
86
100
241
60...
The StatCrunch data set for this question contains the data measurements described in Question 11. (H0...
The StatCrunch data set for this question contains the data
measurements described in Question 11. (H0 :
µ1 - µ2 ≤ 0
HA : µ1 - µ2 > 0)
Assume that the two samples are dawn from independent, normally
distributed populations that have different standard deviations.
Use this data set and the results from Question 11 to calculate the
p-value for the hypothesis test. Round your answer to three
decimal places; add trailing zeros as needed.
The p-value = [S90PValue]....
A data set includes data from student evaluations of courses. The summary statistics are n =...
A data set includes data from student evaluations of courses.
The summary statistics are n = 84, x = 3.35, s = 0.58. Use a 0.05
significance level to test the claim that the population of student
course evaluations has a mean equal to 3.50. Assume that a sample
random sample has been selected. a. Identify the null hypotheses
and alternate hypotheses. addresses the original claim. Ho: H1: b.
Find the test statistics equation and value. c. Find the P...
Problem 3: Electric Cars (No StatCrunch Data Set) According to both a Consumer Report’s and a...
Problem 3: Electric Cars (No StatCrunch Data
Set)
According to both a Consumer Report’s and a AAA survey, about 1
in 5 Americans will buy an electric car as their next vehicle. To
test this claim, an independent surveyor obtained records for 2018
car sales. The surveyor generated a random sample of 285 car sales
and found that 80 of these new car purchases were of electric
cars.
e. Explain the connection between the confidence interval and
the hypothesis test...
Problem 3: Electric Cars (No StatCrunch Data Set) According to both a Consumer Report’s and a...
Problem 3: Electric Cars (No StatCrunch Data
Set)
According to both a Consumer Report’s and a AAA survey, about 1
in 5 Americans will buy an electric car as their next vehicle. To
test this claim, an independent surveyor obtained records for 2018
car sales. The surveyor generated a random sample of 285 car sales
and found that 80 of these new car purchases were of electric
cars.
Using a = 0.05, is there sufficient evidence to conclude that
the...
Problem 3: Electric Cars (No StatCrunch Data Set) According to both a Consumer Report’s and a...
Problem 3: Electric Cars (No StatCrunch Data
Set)
According to both a Consumer Report’s and a AAA survey, about 1
in 5 Americans will buy an electric car as their next vehicle. To
test this claim, an independent surveyor obtained records for 2018
car sales. The surveyor generated a random sample of 285 car sales
and found that 80 of these new car purchases were of electric
cars.
Check the three conditions of the Central Limit Theorem that
allow you...
A data set includes data from student evaluations of courses. The summary statistics are n=93, x...
A data set includes data from student evaluations of courses.
The summary statistics are n=93, x overbar
equals=4.08 sequals=0.65. Use a 0.10 significance level
to test the claim that the population of student course evaluations
has a mean equal to 4.25
Assume that a simple random sample has been selected. Identify
the null and alternative hypotheses, test statistic, P-value, and
state the final conclusion that addresses the original claim.
A data set includes data from student evaluations of courses. The summary statistics are n=80, x...
A data set includes data from student evaluations of courses. The summary statistics are n=80, x overbar =4.39, s =2.29. Use a 0.05 significance level to test the claim that the population of student course evaluations has a mean equal to 4.50. Assume that a simple random sample has been selected. Identify the null and alternative hypotheses, test statistic, P-value, and state the final conclusion that addresses the original claim.
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