Connect hosted by ALEKS Access Card 52-Week for Elementary Statistics: A Step by Step Approach
10th Edition
ISBN: 9781260041798
Author: Allan G. Bluman
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Question
Chapter 9, Problem 2DA
To determine
To test: Whether there is sufficient to support the claim that the means are different.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Snow avalanches can be a real problem for travelers in the western United States and Canada. A very common type of avalanche is called the
slab avalanche. These have been studied extensively by David McClung, a professor of civil engineering at the University of British Columbia.
Suppose slab avalanches studied in a region of Canada had an average thickness of u = 67 cm. The ski patrol at Vail, Colorado, is studying
slab avalanches in its region. A random sample of avalanches in spring gave the following thicknesses (in cm).
59 51 76 38 65 54 49 62
68 55 64 67 63
74 65 79
(i) Use a calculator with sample mean and standard deviation keys to find x and s. (Round your answers to two decimal places.)
X=
cm
S=
cm
(ii) Assume the slab thickness has an approximately normal distribution. Use a 1% level of significance to test the claim that the mean slab
thickness in the Vail region is different from that in the region of Canada.
(a) What is the level of significance?
State the null and…
Snow avalanches can be a real problem for travelers in the western United States and Canada. A very common type of avalanche is called the slab avalanche. These have been studied extensively by David McClung, a professor of civil engineering at the University of British Columbia. Suppose slab avalanches studied in a region of Canada had an average thickness of μ = 68 cm. The ski patrol at Vail, Colorado, is studying slab avalanches in its region. A random sample of avalanches in spring gave the following thicknesses (in cm).
59
51
76
38
65
54
49
62
68
55
64
67
63
74
65
79
(i) Use a calculator with sample mean and standard deviation keys to find x and s. (Round your answers to two decimal places.)
x
=
cm
s
=
cm
(ii) Assume the slab thickness has an approximately normal distribution. Use a 1% level of significance to test the claim that the mean slab thickness in the Vail region is different from that in the region of Canada.
(a) What is the level of significance?
Determine your independent and dependent variables, which type of ANOVA would you choose, and how much replication would be needed.
Farmer Joe has eight different plots of land. He applies two different nitrogen levels randomly to each of the 8 plots, low and high. In addition, four different strawberry varieties are randomized within the plots. He is measuring mass of fruit for his outcome.
I would like to see if there is a difference in birth weight among cat breeds. I will measure 5 different cat breeds.
Chapter 9 Solutions
Connect hosted by ALEKS Access Card 52-Week for Elementary Statistics: A Step by Step Approach
Ch. 9.1 - Home Runs For a sports radio talk show, you are...Ch. 9.1 - Explain the difference between testing a single...Ch. 9.1 - When a researcher selects all possible pairs of...Ch. 9.1 - What three assumptions must be met when you are...Ch. 9.1 - Show two different ways to state that the means of...Ch. 9.1 - For Exercises 5 through 16, perform each of the...Ch. 9.1 - For Exercises 5 through 16, perform each of the...Ch. 9.1 - For Exercises 5 through 16, perform each of the...Ch. 9.1 - For Exercises 5 through 16, perform each of the...Ch. 9.1 - For Exercises 5 through 16, perform each of the...
Ch. 9.1 - For Exercises 5 through 16, perform each of the...Ch. 9.1 - For Exercises 5 through 16, perform each of the...Ch. 9.1 - For Exercises 5 through 16, perform each of the...Ch. 9.1 - Prob. 13ECh. 9.1 - For Exercises 5 through 16, perform each of the...Ch. 9.1 - Self-Esteem Scores In a study of a group of women...Ch. 9.1 - Ages of College Students The dean of students...Ch. 9.1 - Working Breath Rate Two random samples of 32...Ch. 9.1 - Traveling Distances Find the 95% confidence...Ch. 9.1 - Prob. 19ECh. 9.1 - Prob. 20ECh. 9.1 - Television Watching The average number of hours of...Ch. 9.1 - For Exercises 5 through 16, perform each of the...Ch. 9.1 - Prob. 23ECh. 9.1 - Home Prices According to the almanac, the average...Ch. 9.1 - Exam Scores at Private and Public Schools A...Ch. 9.1 - Sale Prices for Houses The average sales price of...Ch. 9.1 - Average Earnings for College Graduates The average...Ch. 9.2 - Too Long on the Telephone A company collects data...Ch. 9.2 - For these exercises, perform each of these steps....Ch. 9.2 - For these exercises, perform each of these steps....Ch. 9.2 - Prob. 3ECh. 9.2 - Prob. 4ECh. 9.2 - For these exercises, perform each of these steps....Ch. 9.2 - For these exercises, perform each of these steps....Ch. 9.2 - For these exercises, perform each of these steps....Ch. 9.2 - For these exercises, perform each of these steps....Ch. 9.2 - Prob. 9ECh. 9.2 - Find the 95% confidence interval for the...Ch. 9.2 - Prob. 11ECh. 9.2 - Prob. 12ECh. 9.2 - Prob. 13ECh. 9.2 - Prob. 14ECh. 9.2 - Prob. 15ECh. 9.2 - Ages of Homes Whiting, Indiana, leads the Top 100...Ch. 9.2 - Prob. 17ECh. 9.2 - Out-of-State Tuitions The out-of-state tuitions...Ch. 9.2 - Gasoline Prices A random sample of monthly...Ch. 9.2 - For these exercises, perform each of these steps....Ch. 9.2 - Prob. 21ECh. 9.2 - Prob. 22ECh. 9.3 - Air Quality As a researcher for the EPA, you have...Ch. 9.3 - Classify each as independent or dependent samples....Ch. 9.3 - For Exercises 2 through 12, perform each of these...Ch. 9.3 - For Exercises 2 through 12, perform each of these...Ch. 9.3 - For Exercises 2 through 12, perform each of these...Ch. 9.3 - For Exercises 2 through 12, perform each of these...Ch. 9.3 - For Exercises 2 through 12, perform each of these...Ch. 9.3 - For Exercises 2 through 12, perform each of these...Ch. 9.3 - For Exercises 2 through 12, perform each of these...Ch. 9.3 - For Exercises 2 through 12, perform each of these...Ch. 9.3 - Toy Assembly Test An educational researcher...Ch. 9.3 - For Exercises 2 through 12, perform each of these...Ch. 9.3 - For Exercises 2 through 12, perform each of these...Ch. 9.3 - Prob. 13ECCh. 9.4 - Smoking and Education You are researching the...Ch. 9.4 - Prob. 1ECh. 9.4 - Find p and q for each. a. n = 36, X = 20 b. n =...Ch. 9.4 - Prob. 3ECh. 9.4 - Find each X, given p. a. p = 0.24, n = 300 b. p =...Ch. 9.4 - Prob. 5ECh. 9.4 - Find p and q. a. X1 = 6, n1 = 15, X2 = 9, n2 = 15...Ch. 9.4 - For Exercises 7 through 27, perform these steps....Ch. 9.4 - Leisure Time In a sample of 150 men, 132 said that...Ch. 9.4 - Prob. 9ECh. 9.4 - For Exercises 7 through 27, perform each of these...Ch. 9.4 - Prob. 11ECh. 9.4 - For Exercises 7 through 27, perform each of these...Ch. 9.4 - Prob. 13ECh. 9.4 - For Exercises 7 through 27, perform each of these...Ch. 9.4 - Prob. 15ECh. 9.4 - Smoking Survey National statistics show that 23%...Ch. 9.4 - For Exercises 7 through 27, perform each of these...Ch. 9.4 - For Exercises 7 through 27, perform each of these...Ch. 9.4 - Prob. 19ECh. 9.4 - For Exercises 7 through 27, perform these steps....Ch. 9.4 - For Exercises 7 through 27, perform these steps....Ch. 9.4 - For Exercises 7 through 27, perform these steps....Ch. 9.4 - For Exercises 7 through 27, perform these steps....Ch. 9.4 - For Exercises 7 through 27, perform these steps....Ch. 9.4 - For Exercises 7 through 27, perform these steps....Ch. 9.4 - For Exercises 7 through 27, perform these steps....Ch. 9.4 - For Exercises 7 through 27, perform these steps....Ch. 9.4 - Prob. 28ECCh. 9.5 - Automatic Transmissions Assume the following data...Ch. 9.5 - When one is computing the F test value, what...Ch. 9.5 - Why is the critical region always on the right...Ch. 9.5 - What are the two different degrees of freedom...Ch. 9.5 - What are the characteristics of the F...Ch. 9.5 - Prob. 5ECh. 9.5 - Using Table H, find the critical value for each....Ch. 9.5 - Prob. 7ECh. 9.5 - Using Table H, find the P-value interval for each...Ch. 9.5 - Prob. 9ECh. 9.5 - For Exercises 9 through 24, perform the following...Ch. 9.5 - For Exercises 9 through 24, perform the following...Ch. 9.5 - For Exercises 9 through 24, perform the following...Ch. 9.5 - Prob. 13ECh. 9.5 - For Exercises 9 through 24, perform the following...Ch. 9.5 - For Exercises 9 through 24, perform the following...Ch. 9.5 - For Exercises 9 through 24, perform the following...Ch. 9.5 - Prob. 17ECh. 9.5 - For Exercises 9 through 24, perform the following...Ch. 9.5 - For Exercises 9 through 24, perform the following...Ch. 9.5 - For Exercises 9 through 24, perform the following...Ch. 9.5 - Prob. 21ECh. 9.5 - For Exercises 9 through 24, perform the following...Ch. 9.5 - For Exercises 9 through 24, perform the following...Ch. 9.5 - For Exercises 9 through 24, perform the following...Ch. 9 - For each exercise, perform these steps. Assume...Ch. 9 - Prob. 9.1.2RECh. 9 - Prob. 9.2.3RECh. 9 - Prob. 9.2.4RECh. 9 - For each exercise, perform these steps. Assume...Ch. 9 - For each exercise, perform these steps. Assume...Ch. 9 - High and Low Temperatures March is a month of...Ch. 9 - Testing After Review A statistics class was given...Ch. 9 - Lay Teachers in Religious Schools A study found a...Ch. 9 - Prob. 9.4.10RECh. 9 - Prob. 9.5.11RECh. 9 - Heights of World Famous Cathedrals The heights (in...Ch. 9 - Prob. 9.5.13RECh. 9 - Prob. 1DACh. 9 - Prob. 2DACh. 9 - Prob. 3DACh. 9 - Prob. 4DACh. 9 - Prob. 5DACh. 9 - Prob. 1CQCh. 9 - Prob. 2CQCh. 9 - Prob. 3CQCh. 9 - Prob. 4CQCh. 9 - Prob. 5CQCh. 9 - To test the equality of two proportions, you would...Ch. 9 - Prob. 7CQCh. 9 - Prob. 8CQCh. 9 - Complete these statements with the best answer. 9....Ch. 9 - Prob. 10CQCh. 9 - Prob. 11CQCh. 9 - Prob. 12CQCh. 9 - Prob. 13CQCh. 9 - Prob. 14CQCh. 9 - Prob. 15CQCh. 9 - Prob. 16CQCh. 9 - For these exercises, perform each of these steps....Ch. 9 - Prob. 18CQCh. 9 - Prob. 19CQCh. 9 - Mathematical Skills In an effort to improve the...Ch. 9 - Prob. 21CQCh. 9 - Prob. 22CQCh. 9 - Prob. 23CQCh. 9 - Prob. 24CQCh. 9 - Prob. 25CQ
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.Similar questions
- What is an experiment?arrow_forwardABC Cookie Company takes samples of finished boxes of cookies weighing them to make sure the weight filled stays within the targeted amount. Some variation of course, is to be expected. But too much presents a production issue. Your job is to find out if this process is stable enough to continue. Samples are taken for 20 days. The number of boxes checked each day is 100. The 20 samples measured reveal the following proportions found to have defective weights: Sample Number Of Defectives Proportion Defective 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 6 0.06 0 0.00 4 0.04 10 0.10 6 0.06 4 0.04 12 0.12 10 0.10 8 0.08 10 0.10 12 0.12 10 0.10 14 0.14 8 0.08 6 0.06 16 0.16 12 0.12 14 0.14 20 0.20 18 0.18 Complete the following: Calculate the centerline (CL), upper control limit (UCL), and the lower control limit (LCL) for a P- Chart. You can use the Excel template to work through this problem. Create a control chart, showing the CL, LCL, and…arrow_forwardSuppose a sample of 16 light trucks is randomly selected off the assembly line. The trucks are driven 1000 miles and the fuel mileage (MPG) of each truck is recorded. It is found that the mean MPG is 22 with a SD equal to 3. The previous model of the light truck got 20 MPG. Conduct a one-sample t-test using the seven-step process and with this information, what can you conclude in step 6? Group of answer choices a. Fail to reject H0 b. Not enough information to make a decision c. Reject H0 d. The one-sample t-test is not the correct testarrow_forward
- Go through the steps of ANOVA hypothesis testing to see if you can conclude that there is a difference among population means. Let a = 0.05. Research by Singh et al. as reported in the journal Clinical Immunology and Immunopathology is concerned with immune abnormalities in autistic children. As part of their research they took measurements on the serum concentration of an antigen in three samples of children, all of whom were 10 years old or younger. The results in units per milliliter of serum follow. Autistic Children: 755, 385, 380, 215, 400, 343, 415, 360, 345, 450, 410, 435, 460, 360, 225 Normal Children: 165, 390, 290, 435, 235, 320, 330, 205, 375, 345, 305, 220, 270, 355, 360 Mentally Retarded Children: 380, 510, 315, 565, 715, 380, 390, 245, 155, 335, 295, 200, 105, 105, 245 What is the Sum of Squares between group?arrow_forwardA survey is conducted to determine if there is a difference in the proportion of students, parents, and The conditions for inference are met. The chi-square test statistic is 0.19 and df = 2. What is the appropriate decision using a = 0.05? teachers who volunteer at least once a month. To investigate, a random sample of 45 students, 25 parents, and 12 teachers was selected from a large high school. The data are displayed in the table. Find the chi-square table here. Because the P-value is less than a = 0.05, the null hypothesis should be rejected. Student Parent Teacher Because the P-value is less than a = 0.05, the null hypothesis should not be rejected. Yes 24 12 Volunteer? No 21 13 Because the P-value is greater than a = 0.05, the null hypothesis should be rejected. The researcher would like to test these hypotheses: Because the P-value is greater than a = 0.05, the null hypothesis should not be rejected. Họ: There is no difference in the distribution of responses among these three…arrow_forwardA paint company has large outlet stores in two cities. Ten samples of the weekly sales (in tons) for the two cities are as follows. City A: n = 10, X10 = 148.5, S1 = = 4.3. City B: n = 10, Y 10 = 144.2, S2 = 3.8. At a = 0.05 level of significance, test if the weekly sales are different. The following ¨answers" have been proposed. (a) The null hypothesis is that the weekly sales are the same and the alternative is that the they are not the same. By using an F test, we reject the null hypothesis. (b) The null hypothesis is that the weekly sales are the same and the alternative is that the they are not the same. By using an F test, we do not reject the null hypothesis. (c) The null hypothesis is that the weekly sales are the same and the alternative is that the they are not the same. By using a i test, we do not reject the null hypothesis. (d) The null hypothesis is that the weekly sales are the same and the alternative is that the they are not the same. By using a i test, we reject the…arrow_forward
- An educational psychologist is testing the new reading technique. According to her hypothesis, students will be able to read faster by using her technique. Students are told to read a page of the journal and the time took to read a page is recorded. Then, the time is compared with the average reading time of the population. She thinks students read faster when they use her new reading method. A). What is the type of test you will use? (z-test, single-sample t-test, paired-samples t-test, or independent samples t-test) and why (what information provided in the problem) B). What are the hypotheses (Be Specific)arrow_forwardI need help finding the test statistic t (rounded to 2 decimal places) and the P-value (rounded to 3 decimal places). Thank youarrow_forwardh) ii). Consider the results in Table 5. After running the regression, we test whether the coefficients of the variables hhsize1 and hhsize2 are equal at 5% significance level. The value of the F-statistic is 26.32. Note that the sample size is 1,593. What is the outcome of the test? i). Do you think the regression in Table 5 suffers from omitted variable bias? If yes, which additional variables would you include to control for omitted variable bias?arrow_forward
- A genetics engineer was attempting to cross a tiger and a cheetah. She predicted a phenotypic outcome of the traits she was observing to be in the following ratio: 4 stripes only: 3 spots only: 9 both stripes and spots. When the cross was performed and she counted the individuals she found 50 with stripes only, 41 with spots only and 85 with both. According to the Chi-square test, did she get the predicted outcome?arrow_forwardDetermine whether the samples are independent or consist of matched pairs. (a) A speed training method is tested by comparing the 100 m times of a group of sprinters who used this method with a group of sprinters who used a different method. F3 O independent samples O matched pairs (b) The amount of water that a random sample of families use per day is measured twice--once before they view a conservation video, and again one week after viewing this video. 4 O independent samples O matched pairs Submit Question R F4 % 5 T Ŝ F5 A Y F6 & 7 S U F7 * PrtScn 8 F8 Home ( F9 O ) End F10 P Farrow_forwardA student decides to spin a dime and determine the proportion of times it lands on heads. The student spins the dime 25 times and records that it lands on heads 17 times. Let p = the true proportion of times the dime would land on heads when spun. Under the assumption that the true proportion is 0.5, 100 simulated proportions for samples of size 25 is shown in the dotplot. Using the dotplot, is there evidence that the proportion of times a spun dime lands on heads is greater than 0.5? A) Yes, a proportion of 0.68 proves that the true proportion of heads is greater than 0.5. B) Yes, a proportion of 0.68 only occurred once out of 100 simulated proportions; therefore, there is sufficient evidence that the true proportion of heads is greater than 0.5. C) No, a proportion of 0.68 is only 0.18 more than 0.5; therefore, there is insufficient evidence that the true proportion of heads is greater than 0.5. D) No, a proportion of 0.68 or more occurred 7 times out of 100 simulated…arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Differential Equation | MIT 18.01SC Single Variable Calculus, Fall 2010; Author: MIT OpenCourseWare;https://www.youtube.com/watch?v=HaOHUfymsuk;License: Standard YouTube License, CC-BY