Researchers collected data on the numbers of hospital admissions resulting from motor vehicle crashes, and results are given below for Fridays on the 6th of a month and Fridays on thefollowing 13th of the same month. Use a 0.05 significance level to test the claim that when the 13th day of a month falls on a Friday, the numbers of hospital admissions from motorvehicle crashes are not affected.Friday the 6th:Friday the 13th:1014713What are the hypotheses for this test?Let Hd be the mean of the differencesHo: Hd = 0H₁: Hd01114111046Find the value of the test statistic.t= -2.860 (Round to three decimal places as needed.)5013in the numbers of hospital admissions resulting from motor vehicle crashes for the population of all pairs of data.Identify the critical value(s). Select the correct choice below and fill the answer box within your choice.(Round to three decimal places as needed.)OA. The critical values are t = tOB. The critical value is t =

Friday the 8th. Friday the 13th 10. 14 7.…

Answered: Researchers collected data on the…

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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A marketing agency wanted to determine if a new commercial changed people's opinion about a company. They recruited n=30 participants to watch the commercial. First, everyone was givien a survey to determine their attitudes toward the company. Then, everyone watched the new commercial. Finally, they were given the same survey again and asked about their attitudes toward the comapny after seeing the commercial. The agency wanted to see if attitudes were changed by the commercial. What statistical test should they use?
Suppose that you are curious to find out if there is any relationship between householdhead and employment status. Discuss why hypothesis test of means may not be useful to make inference in this case. Respondent Household head SEX AGE Hours worked per week Main type of work Length of time at job Years of secondary schooling Examination passed Employment Status Income 1 1 2 27 16 5 7 5 1 6 78000 2 2 1 24 40 5 5 3 99 3 78000 3 2 2 26 60 5 6 5 1 3 129996 4 2 1 46 40 4 7 5 1 3 78000 5 1 2 31 40 8 7 3 1 3 129996 6 1 1 48 24 4 7 3 1 3 46800 7 2 1 19 45 5 5 3 1 3 78000 8 1 2 63 16 6 7 3 1 6 46800 9 2 1 26 40 9 7 4 9 3 78000 10 1 2 38 40 7 2 5 1 6 360000 11 1 1 48 24 4 7 3 1 3 46800 12 2 1 19 45 5 5 3 1 3 78000 13 1 2 63 16 6 7 3 1 6 46800 14 2 1 26 40 9 7 4 9 3 78000 15 1 2 38 40 7 2 5 1 6 360000 16 2 1 19 40 4 4 5 3 3 78000 17 1 1 37 45 5 7 3 9 6 779948 18 2 1 40 40 9 7 4 9 3 78000 19 2 1 40 60 5 5 3 1 3 78000 20 1 1 28 40 2 5 5 8 3…
Your teacher claims to produce random numbers from 1 to 5 (inclusive) on her calculator, but you’ve been keeping track. In the past 80 rolls, the number “five” has come up only 8 times. You suspect that the calculator is producing fewer fives than it should. Let p = actual long-run proportion of five’s produced by the calculator. The hypotheses for testing the teacher’s claim are:
Q2. A survey is made asking people that they dinned out in the New Year Eve. Males and female are asked if they remember the name of restaurant that visited in the last new year eve. The reason of the survey to find out if there is a relation between the person's ability to recall and the gender. Use the significance level a = 0.025 to make a hypothesis test. Female Male 52 44 Can Recall Can Not Recall 23 40 APPENDIX G 859 APPENDIX G Values of X for Selected Probabilities fo2t x x²=9.2363 PROBABILITIES (OR AREAS UNDER CHI-SQUARE DISTRIBUTION CURVE ABOVE GIVEN CHI-SQUARE VALUES) 0.95 0.90 0.10 0.05 0.025 0.01 0.005 Values of Chi-Squared 0.995 0.99 0975 of 0.0158 27055 1 0.0000 0.0002 00010 0.0039 0.0158 27055 38415 50239 6.6349 7.8794 2 0.0100 0.0201 0.0506 0.1026 02107 46052 59915 7.3778 9.2104 10.5965 3 0.0717 0.1148 02158 0.3538 0.5844 6.2514 7.8147 9.3484 11.3449 12.8381 4 0.2070 0.2971 0.4844 0.7107 10636 7.7794 9.4877 11.1433 13.2767 14.8602 5 04118 0.5543 08312 1.1455 1.6103…
Researchers collected data on the numbers of hospital admissions resulting from motor vehicle crashes, and results are given below for Fridays on the 6th of a month and Fridays on the following 13th of the same month. Use a 0.05 significance level to test the claim that when the 13th day of a month falls on a Friday, the numbers of hospital admissions from motor vehicle crashes are not affected. Friday the 6th: 9 6 10 10 3 5 Friday the 13th: 14 13 13 9 5 12 What are the hypotheses for this test? Let μd be the ▼ mean of the differences difference between the means in the numbers of hospital admissions resulting from motor vehicle crashes for the population of all pairs of data. H0: μd ▼ less than< less than or equals≤ equals= greater than or equals≥ greater than> not equals≠ 0 H1: μd ▼ greater than> equals= not equals≠ greater than or equals≥ less than< less than or equals≤ 0 Find the value…
Randomly selected birth records were obtained, and categorized as listed in the table to the right. Use a 0.01 significance level to test the reasonable claim that births occur with equal frequency on the different days of the week. How might the apparent lower frequencies on Saturday and Sunday be explained? Tues Day Wed Thurs Fri Sun 42 Mon 56 Sat 38 59 Number of Births 59 62 60 Determine the null and alternative hypotheses. Ho H₁ Calculate the test statistic, ² 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? OA. Fail to reject Ho. There is insufficient evidence to warrant rejection of the claim that births occur with equal frequency on the different days of the week. B. Reject Ho. There is insufficient evidence to warrant rejection of the claim that births occur with equal frequency on the different days of the week. OC. Fail to reject Ho There is sufficient…
Randomly selected birth records were obtained, and categorized as listed in the table to the right. Use a 0.01 significance level to test the reasonable claim that births occur with equal frequency on the different days of the week. How might the apparent lower frequencies on Saturday and Sunday be explained? Day Sun Mon Tues Wed Thurs Fri Sat Number of Births 46 63 58 59 63 63 36 Determine the null and alternative hypotheses. Ho H, Calculate the test statistic, y2. x = (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 births occur with equal frequency on the different days of the week. O B. Fail to reject Ho. There is sufficient evidence to warrant rejection of the claim that births occur with equal frequency on the different days of the week OC. Reject Ho- There is insufficient evidence…
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?
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 fundamenta error with this analysis? Day Frequency Sun 154 Mon 205 Tues 230 Thurs 177 Fri 210 Sat 230 Wed 241 Determine the null and alternative hypotheses Calculate the test statistic. r=ORound to three decimal places as needed.) Calculate the P-value. Pvalue =O (Round to four decimal places as needed.)

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