Three years ago, the mean price of an existing single-family home was $243,721. A real estate broker believes that existing home prices in her neighborhood are higher.(a) Determine the null and alternative hypotheses.(b) Explain what it would mean to make a Type I error.(c) Explain what it would mean to make a Type Il error.(a) State the hypotheses.Ho:H,:vs 243721(Type integers or decimals. Do not round.)

Null hypothesis H0:mu=$243721 Alternate hypothesis H1:mu>$243721

Answered: Three years ago, the mean price of an…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Three years ago, the mean price of an existing single-family home was $243,793. A real estate broker believes that existing home prices in her neighborhood are lower. (a) Determine the null and alternative hypotheses. (b) Explain what it would mean to make a Type I error. (c) Explain what it would mean to make a Type Il error. (a) State the hypotheses. Ho: H;: (Type integers or decimals. Do not round.) (b) Which of the following is a Type I error? O A. The broker fails to reject the hypothesis that the mean price is $243,793, when it is the true mean cost. O B. The broker rejects the hypothesis that the mean price is $243,793, when it is the true mean cost. O c. The broker fails to reject the hypothesis that the mean price is $243,793, when the true mean price is less than $243,793. O D. The broker rejects the hypothesis that the mean price is $243,793, when the true mean price is less than $243,793. (c) Which of the following is a Type Il error? O A. The broker rejects the hypothesis…
Assume that matched pairs of data from a poll of Internet users who were asked if they make travel plans through the Internet result in 304 positive signs, 278 negative signs, and 35 ties when the value of the secon variable is subtracted from the corresponding value of the first variable. Use the sign test with a 0.05 significance level to test the null hypothesis of no difference. Let ₁ denote the median of the first variable and 12 denote the median of the second variable. What are the null and alternative hypotheses? O A. Ho: 1₁2 112 H₁:1₁ <1₂ OC. Ho: 11₁ 112 H₁: 1₁ <12 O B. Ho: 11 #11₂ H₁:1₁ =1₂ O D. Ho: 111 112 H₁:1₁ #1₂ Find the test statistic. Test statistic = Find the P-value. P-value= (Round to four decimal places as needed.) Does the null hypothesis of no difference hold? (Round to two decimal places as needed.) O A. Since the P-value is less than the significance level, reject the null hypothesis of no difference. O B. Since the P-value is greater than the significance…
3) A Chi-square test can be done to test all of the following EXCEPT which of the following? If the mathematical model accurately predicts the pattern of data values observed. If the mathematical model accurately predicts the total number of values observed. If traits exhibit independence with regards to the probability of seeing their combinations in individuals in a population. If individuals from different populations have the same probability of possessing various traits. If the mathematical model accurately predicts the proportions of data values observed.
Researchers wanted to determine if having a computercomputer in the bedroom is associated with obesity. The researchers administered a questionnaire to 394394 twelve-year-old adolescents. After analyzing the results, the researchers determined that the body mass index of the adolescents who had a computercomputer in their bedroom was significantly higher than that of the adolescents who did not have a computercomputer in their bedroom. Complete parts (a) through (e) below.(a) Why is this an observational study? What type of observational study is this? Why is this an observational study? A.The researchers administered a questionnaire to obtain their data without trying to influence an explanatory variable of the study. B.The researchers observed the behavior of the individuals in the study without trying to influence an explanatory variable of the study. C.The researchers tried to influence the outcome of the study. D.The researchers intentionally changed an explanatory…
What is the null and alternative hypotheses for the average weight of dogs is 15.6 pounds?
Mr. Jones believes that the mean income of lawyers has changed and is no longer $65 thousand per year. Which is the correct set of hypotheses to test this belief? O Ho:µ 2 65,000; Ha: µ 65, 000 О Нор - 65, 000; На: и # 65, 000 О Нор 65, 000
The degrees of freedom is critical to computing the p-value for the chi-square goodness of fit. We will discuss the p-value in the next lab. The degrees of freedom for the Chi-Square goodness of fit is equal to (the number of non-zero rows in the table) - 1. The number of non-zero rows is the number of expected values that are non-zero. For example: Phenotype ... Expected ... Disease ... 234 ... Wild-type ... 6743 ... has two rows where the Expected value is non-zero. So the degrees of freedom is 2-1 = 1. Another example: Phenotype ... Expected ... Disease ... 2374 ... Wild-type ... 0 ... has one row where the Expected value is non-zero. So the degrees of freedom is 1-1 = 0. With 0 degrees of freedom, the chi-square test cannot be calculated. A third example (sex-linked): Phenotype ... Expected ... Disease-Male ... 2374 ... Disease-Female ... 9456 Wild-type-Male ... 1001 ... Wild-type-Female ... 235 ... has four rows where the Expected values are…
To determine if there is an association between gender and reading habits, 270 adults are randomly sampled from across the United States and asked the following question: “How often do you read a book outside of work or school: regularly, sometimes, or never?” The results are summarized in the following table: OBSERVED READING HABITS Regularly Sometimes Never Total Male 42 72 10 124 Female 72 74 7 146 Total 107 146 17 270 a)What are the appropriate hypotheses for this chi-square test? b)What are the appropriate degrees of freedom for this test?
According to an NDP Group report, the mean number of meals prepared and eaten at home is 700 per year. Suppose that a random sample of 36 households showed a sample mean number of meals prepared and eaten at home was 690. Assume σ = 40. Test whether the population mean number of such meals is less than 700 using a significance level of 0.01. State the null and alternate hypotheses. Explain whether your test will be left, right, or two-tailed.
A police department released the numbers of calls for the different days of the week during the month of October, as shown in the table to the right. Use a 0.01 significance level to test the claim that the different days of the week have the same frequencies of police calls. What is the fundamental error with this analysis? Day Sun Mon Tues Wed Thurs Fri Sat Frequency 156 210 223 242 177 209 232 Calculate the test statistic, x2. x2 = (Round to three decimal places as needed.) Calculate the P-value. P-value = (Round to four decimal places as needed.) What is the conclusion for this hypothesis test? O A. Reject Ho. There is sufficient evidence to warrant rejection of the claim that the different days of the week have the same frequencies of police calls. O B. Fail to reject Ho. There is sufficient evidence to warrant rejection of the claim that the different days of the week have the same frequencies of police calls. O c. Reject Ho. There is insufficient evidence to warrant rejection of…
A group of students estimated the length of one minute without reference to a watch or clock, and the times (seconds) are listed below. Use a 0.10 significance level to test the claim that these times are from a population with a mean equal to 60 seconds. Does it appear that students are reasonably good at estimating one minute? 88 47 76 52 30 68 71 75 54 73 80 101 101 72 What are the null and alternative hypotheses? В. Но: и260 seconds H:µ= 60 seconds A. Ho: µ= 60 seconds %3D H1: µ> 60 seconds С. Но н O D. Ho: µ= 60 seconds H: µ< 60 seconds = 60 seconds %3D H1: µ#60 seconds
Three years ago, the mean price of an existing single-family home was $243,765. A real estate broker believes that existing home prices in her neighborhood are higher. (a) Determine the null and alternative hypotheses. (b) Explain what it would mean to make a Type I error. (c) Explain what it would mean to make a Type Il error. (a) State the hypotheses. Họ: H1: (Type integers or decimals. Do not round.)

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