Introductory Statistics
1st Edition
ISBN: 9781938168208
Author: Barbara Illowsky, Susan Dean
Publisher: OpenStax College
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Chapter 13, Problem 5P
One-Way ANOVA
Use the following information to answer the next five exercises. There are five basic assumptions that must be fulfilled in
Write the final assumption
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Customers experiencing technical difficulty with their Internet cable service may call an 800 number for technical support. It takes the technician between 30 seconds and 11 minutes to resolve the problem. The distribution of this support time follows the uniform distribution.
Required:
a. What are the values for a and b in minutes?
Note: Do not round your intermediate calculations. Round your answers to 1 decimal place.
b-1. What is the mean time to resolve the problem?
b-2. What is the standard deviation of the time?
c. What percent of the problems take more than 5 minutes to resolve?
d. Suppose we wish to find the middle 50% of the problem-solving times. What are the end points of these two times?
Exercise 6-6 (Algo) (LO6-3)
The director of admissions at Kinzua University in Nova Scotia estimated the distribution of student admissions for the fall semester on the basis of past experience.
Admissions
Probability
1,100
0.5
1,400
0.4
1,300
0.1
Click here for the Excel Data File
Required:
What is the expected number of admissions for the fall semester?
Compute the variance and the standard deviation of the number of admissions.
Note: Round your standard deviation to 2 decimal places.
1. Find the mean of the x-values (x-bar)
and the mean of the y-values (y-bar) and write/label each here:
2. Label the second row in the table using proper notation; then, complete the table. In the fifth and sixth
columns, show the 'products' of what you're multiplying, as well as the answers.
X
y
x minus x-bar y minus y-bar (x minus x-bar)(y minus y-bar)
(x minus x-bar)^2
xy
16
20
34
4-2
5 2
3. Write the sums that represents Sxx and Sxy in the table, at the bottom of their respective columns.
4. Find the slope of the Regression line: bi
=
(simplify your answer)
5. Find the y-intercept of the Regression line, and then write the equation of the Regression line.
Show your work. Then, BOX your final answer. Express your line as "y-hat equals...
Chapter 13 Solutions
Introductory Statistics
Ch. 13 - As part of an experiment to see how different...Ch. 13 - MRSA, or Staphylococcus aureus, can cause a...Ch. 13 - Four sports teams took a random sample of players...Ch. 13 - Another fourth grader also grew bean plants, but...Ch. 13 - The New York Choral Society divides male singers...Ch. 13 - Use the following information to answer the next...Ch. 13 - Use the following information to answer the next...Ch. 13 - One-Way ANOVA Use the following information to...Ch. 13 - One-Way ANOVA Use the following information to...Ch. 13 - One-Way ANOVA Use the following information to...
Ch. 13 - State the null hypothesis for a one-way ANOVA test...Ch. 13 - State the alternative hypothesis for a one-way...Ch. 13 - When do you use an ANOVA test?Ch. 13 - The F Distribution and the F-Ratio Use the...Ch. 13 - 2 The F Distribution and the F-Ratio Use the...Ch. 13 - The F Distribution and the F-Ratio Use the...Ch. 13 - The F Distribution and the F-Ratio Use the...Ch. 13 - The F Distribution and the F-Ratio Use the...Ch. 13 - The F Distribution and the F-Ratio Use the...Ch. 13 - The F Distribution and the F-Ratio Use the...Ch. 13 - Use the following information to answer the next...Ch. 13 - Use the following information to answer the next...Ch. 13 - Use the following information to answer the next...Ch. 13 - Use the following information to answer the next...Ch. 13 - Use the following information to answer the next...Ch. 13 - Use the following information to answer the next...Ch. 13 - Use the following information to answer the next...Ch. 13 - Use the following information to answer the next...Ch. 13 - Use the following information to answer the next...Ch. 13 - What happens to the curves as the degrees of...Ch. 13 - What is the df(num)?Ch. 13 - What is the df(denom)?Ch. 13 - What are the Sum of Squares and Mean Squares...Ch. 13 - What are the Sum of Squares and Mean Squares...Ch. 13 - What is the F statistic?Ch. 13 - What is the p-value?Ch. 13 - At the 5% significance level, is there a...Ch. 13 - Use the following information to answer the next...Ch. 13 - Use the following information to answer the next...Ch. 13 - Use the following information to answer the next...Ch. 13 - Use the following information to answer the next...Ch. 13 - Use the following information to answer the next...Ch. 13 - Use the following information to answer the next...Ch. 13 - Use the following information to answer the next...Ch. 13 - Use the following information to answer the next...Ch. 13 - Use the following information to answer the next...Ch. 13 - Use the following information to answer the next...Ch. 13 - Test of Two Variances Use the following...Ch. 13 - Test of Two Variances Use the following...Ch. 13 - Use the following information to answer the next...Ch. 13 - Use the following information to answer the next...Ch. 13 - Use the following information to answer the next...Ch. 13 - Use the following information to answer the next...Ch. 13 - Use the following information to answer the next...Ch. 13 - What is the p-value?Ch. 13 - Is the claim accurate?Ch. 13 - Use the following information to answer the next...Ch. 13 - Use the following information to answer the next...Ch. 13 - Use the following information to answer the next...Ch. 13 - Use the following information to answer the next...Ch. 13 - Use the following information to answer the next...Ch. 13 - Use the following information to answer the next...Ch. 13 - Use the following information to answer the next...Ch. 13 - Three different traffic routes are tested for mean...Ch. 13 - Suppose a group is interested in determining...Ch. 13 - The F Distribution and the F-Ratio Use the...Ch. 13 - The F Distribution and the F-Ratio Use the...Ch. 13 - The F Distribution and the F-Ratio Use the...Ch. 13 - Three students, Linda, Tuan, and Javier, are given...Ch. 13 - A grassroots group opposed to a proposed increase...Ch. 13 - Use the following information to answer the next...Ch. 13 - Use the following information to answer the next...Ch. 13 - A researcher wants to know if the mean times (in...Ch. 13 - Are the means for the final exams the same for all...Ch. 13 - Are the mean number of times a month a person eats...Ch. 13 - Are the mean numbers of daily visitors to a ski...Ch. 13 - Sanjay made identical paper airplanes out of three...Ch. 13 - DDT is a pesticide that has been banned from use...Ch. 13 - The data shown is the recorded body temperatures...Ch. 13 - Three students, Linda, Tuan, and Javier, are given...Ch. 13 - A grassroots group opposed to a proposed increase...Ch. 13 - Which two magazine types do you think have the...Ch. 13 - Which two magazine types do you think have...Ch. 13 - Is the variance for the amount of money, in...Ch. 13 - Are the variances for incomes on the East Coast...Ch. 13 - Thirty men in college were taught a method of...Ch. 13 - King Manuel I, Komnenus ruled the Byzantine Empire...Ch. 13 - The American League and the National League of...
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- Apply STATA commands & submit the output for each question only when indicated below i. Generate the log of birthweight and family income of children. Name these new variables Ibwght & Ifaminc. Include the output of this code. ii. Apply the command sum with the detail option to the variable faminc. Note: you should find the 25th percentile value, the 50th percentile and the 75th percentile value of faminc from the output - you will need it to answer the next question Include the output of this code. iii. iv. Use the output from part ii of this question to Generate a variable called "high_faminc" that takes a value 1 if faminc is less than or equal to the 25th percentile, it takes the value 2 if faminc is greater than 25th percentile but less than or equal to the 50th percentile, it takes the value 3 if faminc is greater than 50th percentile but less than or equal to the 75th percentile, it takes the value 4 if faminc is greater than the 75th percentile. Include the outcome of this code…arrow_forwardsolve this on paperarrow_forwardApply STATA commands & submit the output for each question only when indicated below i. Apply the command egen to create a variable called "wyd" which is the rowtotal function on variables bwght & faminc. ii. Apply the list command for the first 10 observations to show that the code in part i worked. Include the outcome of this code iii. Apply the egen command to create a new variable called "bwghtsum" using the sum function on variable bwght by the variable high_faminc (Note: need to apply the bysort' statement) iv. Apply the "by high_faminc" statement to find the V. descriptive statistics of bwght and bwghtsum Include the output of this code. Why is there a difference between the standard deviations of bwght and bwghtsum from part iv of this question?arrow_forward
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