According to a certain government agency for a large country, the proportion of fatal traffic accidents in the country inwhich the driver had a positive blood alcohol concentration (BAC) is 0.38. Suppose a random sample of 112 trafficfatalities in a certain region results in 52 that involved a positive BAC. Does the sample evidence suggest that the regionhas a higher proportion of traffic fatalities involving a positive BAC than the country at the α = 0.1 level of significance?Because npo (1-Po)=(Round to one decimal place as needed.)What are the null and alternative hypotheses?10, the sample size isHo:versus H₁:(Type integers or decimals. Do not round.)Find the test statistic, Zo.Find the P-value.P-value =Zo (Round to two decimal places as needed.)=the requirements for testing the hypothesis5% of the population size, and the samplesatisfied.(Round to three decimal places as needed.)

Answered: Image /qna-images/answer/df7d450d-e340-435d-8d78-9327a6f6184e.jpg

Answered: fatalities in a certain region results…

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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Q10. A Random Variable X has an unknown distribution, a known mean of 10 and an unknown variance, oʻ. To test a claim that the distribution is no longer 10, a random sample of 100 of X was collected which gave a sample mean, x of 9.8 and a sample variance, s? = 16. What is the hypothesis testing decision based on this data? A. Reject the Null: x = 10. C. Don’t Reject the Null: µ = 10. B. Don't reject the Null: x = 10 %3D D. Reject the Null: µ = 10. O A. A В. В ОС. С O D. D
Pls help both in 20 minutes
The recommended daily dietary allowance for zinc among males older than age 50 years is 15 mg/day. An article reports the following summary data on intake for a sample of males age 65-74 years: n-118, x- 12.2, and s-6.96, Does this data indicate that average daily zinc intake in the population of all males age 65-74 falls below the recommended allowance? (Use a -0.05.) State the appropriate null and alternative hypotheses, ⒸHR=15 OH₂ = 15 H₂p=15 H₂ <15 ⒸH-15 H₁ s 15 Calculate the test statistic and determine the P-valde (Round your test statistic to two decimal places and your P-value to four decimal
A study is designed to determine the effect of an office-training course on typing productivity. Fifteen typists who have not taken the course are randomly selected. The investigator assigns 20 pages of equally difficult text to be typed by each typist both before and after completing the training course. The investigator wants to find out whether the training course has reduced the number of errors by more than 10. Define d = Before − After. Significance level What conclusion should we reach if the p-value is 0.113?
A manufacturer must test that his bolts are 4.00 cm long when they come off the assembly line. He must recalibrate his machines if the bolts are too long or too short. After sampling 121 randomly selected bolts off the assembly line, he calculates the sample mean to be 4.21 cm. He knows that the population standard deviation is 0.83 cm. Assuming a level of significance of 0.02, is there sufficient evidence to show that the manufacturer needs to recalibrate the machines? Step 3 of 3: Draw a conclusion and interpret the decision.
10.2.26-1 Question Help In a survey, 43% 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 160 pet owners and discovered that 65 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) = 10, the sample size is V 5% of the population size, and the sample the requirements for testing the hypothesis satisfied. (Round to one decimal place as needed.)
A Z-test for single population mean is conducted with Ha: H < 10, at significance level of 0.05, The most significant result is suggested by the following test statistic -1.65 2.2 4.7 1.96 O3.7 -4.5
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Studies show that the level of anxiety has increased since the pandemic. The average score before the pandemic was mu equal to 10. A sample of 76 individuals surveyed in the past three months produced M=12.8 and s=6.7. Based on the sample, was there a significant increase in the average anxiety level since the pandemic started at the 5% significance level? What hypothesis test is this? (a)Chi-Square Test for Independence (b)One-Sample T-Test for Mean (c)One-Sample Z-Test for Mean (d)Two-Sample T-Test for Mean
What is the cut off score on a Chi-Square distribution in a Goodness of Fit Chi Square Test when the variable has 6 categories and a sample size of 20? Assume a significance level=.05. a. 5 b. 12.59 c. 6 d. 11.0
A sample of 100 yielded a test statistic of 2.1. For a level of significance of 0.05, the null hypothesis was rejected. What was the sample proportion for the sample of .1 100? What was the p-value for this test? 0.864
Please help me find the standardized test statistic and the P-value

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