A telephone company claims that more than15% of its customers have at least twotelephone lines. The company selects arandom sample of 250 customers and findsthat 50 have at least two telephone lines.Does the data support the claim? Use a P-value.Which of the following is correct?a. H0: p = 0.15 versus H1: p = 0.15,reject HO at 0.05 level ofsignificanceO b. H0: p ≤ 0.15 versus H1: p > 0.15,reject HOat 0.01 level ofsignificancec. H0: p ≤ 0.15 versus Hl: p > 0.15,not reject HO at 0.01 level ofsignificanceO d. H0: p ≤ 0.15 versus Hl: p > 0.15,not reject HO at 0.05 level ofsignificancedodo

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Answered: A telephone company claims that more…

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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The work week for adults in the US that work full time is normally distributed with a mean of 47 hours. A newly hired engineer at a start-up company believes that employees at start-up companies work more on average then most working adults in the US. She asks 12 engineering friends at start- ups for the lengths in hours of their work week. Their responses are shown in the table below. Test the claim using a 1% level of significance. Give answer to at least 4 decimal places. Hours 49 44 57 54 45 67 45 48 48 45 54 55 What are the correct hypotheses? Họ: Select an answer O ? hours H1: Select an answer O ? hours Based on the hypotheses, find the following: Test Statistic= p-value=
The work week for adults in the US that work full time is normally distributed with a mean of 47 hours. A newly hired engineer at a start-up company believes that employees at start-up companies work more on average then most working adults in the US. She asks 12 engineering friends at start-ups for the lengths in hours of their work week. Their responses are shown in the table below. Test the claim using a 1% level of significance. Give answer to at least 4 decimal places. Hours 47 45 59 53 50 62 51 48 49 49 55 53 What are the correct hypotheses? H0: hours H1: hours Based on the hypotheses, find the following: Test Statistic= p-value=
Listed below are the lead concentrations (in ug / g) measured in different Ayurveda medicines. Ayurveda is a traditional medical system commonly used in India. The lead concentrations listed here are from medicines manufactured in the United States. Assume that a simple random sample has been selected. Use a 0.05 significance level to test the claim that the mean lead concentration for all such medicines is less than 14.0 ug/g. 2.98 6.45 6.00 5.49 20.51 7.47 12.00 20.54 11.47 17.51 O Ho: H,: (Type integers or decimals. Do not round.) es Identify the test statistic. (Round to two decimal places as needed.) ol Identify the P-value. (Round to three decimal places as needed.) State the conclusion about the null hypothesis, as well as the final conclusion that addresses the original claim. the null hypothesis. There V sufficient evidence at the 0.05 significance level to V the claim that the mean lead concentration for all Ayurveda medicines manufactured in the United States is less than…
Find the standardized test statistic, z, to test the claim that p,
In a survey, 45% of the respondents stated that they talk to their pets on the telephone. A veterinarian believed this result to be too high, so he randomly selected 240 pet owners and discovered that 104 of them spoke to their pet on the telephone. Does the veterinarian have a right to be skeptical? Use the a = 0.01 level of significance. Because npo (1- Po) = 59.4 > 10, the sample size is less than 5% of the population size, and the sample is given to be random, the requirements for testing the hypothesis satisfied, are (Round to one decimal place as needed.) What are the null and alternative hypotheses? |versus H,: Họ: (Type integers or decimals. Do not round.)
In a survey, 37% of the respondents stated that they talk to their pets on the telephone. A veterinarian believed this result to be too high, so she randomly selected 170 pet owners and discovered that 59 of them spoke to their pet on the telephone. Does the veterinarian have a right to be skeptical? Use the a = 0.1 level of significance. Because npo (1- Po) =O > 10, the sample size is less than 5% of the population size, and the sample is given to be random, the requirements for testing the hypothesis satisfied. are (Round to one decimal place as needed.)
A safety administration conducted crash tests of child booster seats for cars. Listed below are results from those tests, with the measurements given in hic (standard head injury condition units). The safety requirement is that the hic measurement should be less than 1000 hic. Use a 0.05 significance level to test the claim that the sample is from a population with a mean less than 1000 hic. Do the results suggest that all of the child booster seats meet the specified requirement? 670 603 1014 534 501 662 What are the hypotheses? . H μ 1000 hic Hi μ< 1000 hic Hi με 1000 hic What is the test statistic? Z = (Round to two decimal places as needed.) What is the P-value? P-value = (Round to four decimal places as needed.) State the final conclusion that addresses the original claim. - ( fail to reject/reject ) HO. There is _( sufficient/not sufficient) evidence to support the claim that the sample is from a population with a mean less than 1000 hic. What do the results suggest about the…
The work week for adults in the US that work full time is normally distributed with a mean of 47 hours. A newly hired engineer at a start-up company believes that employees at start-up companies work more on average then most working adults in the US. She asks 12 engineering friends at start-ups for the lengths in hours of their work week. Their responses are shown in the table below. Test the claim using a 10% level of significance. Give answer to at least 4 decimal places. Hours 48 46 53 51 49 68 47 60 48 49 52 55 What are the correct hypotheses? Ho: Select an answer hours H1: Select an answer hours Based on the hypotheses, find the following: Test Statistic= p-value= The correct decision is to Select an answer O that the mean number of The correct summary would be: hours of all employees at start-up companies work more than the US mean of 47 hours. Select an answer
The work week for adults in the US that work full time is normally distributed with a mean of 47 hours. A newly hired engineer at a start-up company believes that employees at start-up companies work more on average then most working adults in the US. She asks 12 engineering friends at start-ups for the lengths in hours of their work week. Their responses are shown in the table below. Test the claim using a 1% level of significance. Give answer to at least 4 decimal places. Hours 45 40 54 54 45 68 48 58 49 50 50 55 What are the correct hypotheses? Ho: Select an answer v hours H: Select an answer v hours Based on the hypotheses, find the following: Test Statistic= p-value= The correct decision is to Select an answer v that the mean number The correct summary would be: Select an answer of hours of all employees at start-up companies work more than the US mean of 47 hours.
The work week for adults in the US that work full time is normally distributed with a mean of 47 hours. A newly hired engineer at a start-up company believes that employees at start-up companies work more on average then most working adults in the US. She asks 12 engineering friends at start-ups for the lengths in hours of their work week. Their responses are shown in the table below. Test the claim using a 1% level of significance. Give answer to at least 4 decimal places. Hours 45 49 51 55 47 68 46 55 45 49 53 51 47 hours a. What are the correct hypotheses? Ho H Hyp 47 Based on the hypotheses, find the following: b. Test Statistic = esc K 0 71 hours #3 72 W Q D 64 25 ום
The work week for adults in the US that work full time is normally distributed with a mean of 47 hours. A newly hired engineer at a start-up company believes that employees at start-up companies work more on average then most working adults in the US. She asks 12 engineering friends at start-ups for the lengths in hours of their work week. Their responses are shown in the table below. Test the claim using a 1% level of significance. Give answer to at least 4 decimal places. Hours 50 46 55 52 45 66 58 60 46 46 52 53 What are the correct hypotheses? H0: hoursH1: hours Based on the hypotheses, find the following:Test Statistic=p-value= The correct decision is to . The correct summary would be: that the mean number of hours of all employees at start-up companies work more than the US mean of 47 hours.
Since an instant replay system for tennis was introduced at a major tournament, men challenged 1415 referee calls, with the result that 419 of the calls were overturned. Women challenged770 referee calls, and 225 of the calls were overturned. Use a 0.05 significance level to test the claim that men and women have equal success in challenging calls. A. Identify the test statistic. z equals (Round to two decimal places as needed.) B. Identify the P-value. P-value equals (Round to three decimal places as needed.) C. Test the claim by constructing an appropriate confidence interval. The 99% confidence interval is less than left parenthesis p 1 minus p 2 right parenthesis less than . (Round to three decimal places as needed.)

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