A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2905 occupants notwearing seat belts, 37 were killed. Among 7830 occupants wearing seat belts, 13 were killed. Use a 0.05 significancelevel to test the claim that seat belts are effective in reducing fatalities. Complete parts (a) through (c) below.what is the conclusion based on the nypotnesis test?The P-value isY the significance level of α = 0.05, soY the null hypothesis. Theresufficient evidence to support the claim that the fatality rate is higher for those not wearing seat belts.b. Test the claim by constructing an appropriate confidence interval.The appropriate confidence interval is < (P₁-P2) <0.(Round to three decimal places as needed.)What is the conclusion based on the confidence interval?Because the confidence interval limitsBecause the confidence interval limits includefor those not wearing seat belts.0, it appears that the two fatality rates arevalues, it appears that the fatality rate is KA simple random sample of front-seat occupants involved in car crashes is obtained. Among 2905 occupants notwearing seat belts, 37 were killed. Among 7830 occupants wearing seat belts, 13 were killed. Use a 005 significancelevel to test the claim that seat belts are effective in reducing fatalities. Complete parts (a) through (c) below.OA. Ho: P1 SP2H₁: P1 P2OD. Ho: P1 = P2H₁: P1 P2Identify the P-value.Identify the test statistic.2-0(Round to two decimal places as needed.)0-0OB. Ho: P1 = P2H₁: P1 P2P-valueM-.LTL 11144OE. Ho: P1 P2H₁ P1 = P2OC. Ho P1 = P2H₁: P1 P2OF. Ho: P12 P2H₁: P1 P2

For "Not wearing seatbelts": The sample size, n1=2905. The sampled occupants, who were killed,…

Answered: Simple random sample of front-seat…

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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#32). Please show work and answers, need to see how it’s done. Thank you!
According to a certain government agency for a large country, the proportion of fatal traffic accidents in the country in which the driver had a positive blood alcohol concentration (BAC) is 0.38. Suppose a random sample of 105 traffic fatalities in a certain region results in 51 that involved a positive BAC. Does the sample evidence suggest that the region has a higher proportion of traffic fatalities involving a positive BAC than the country at the a = 0.01 level of significance? Because npo (1 - Po 10, the sample size is 5% of the population size, and the sample the requirements for testing the hypothesis satisfied. (Round to one decimal place as needed.) can be reasonably assumed to be random, What are the null and alternative hypotheses? is given to be random, cannot be reasonably assumed to be random, Ho: versus H,: (Type integers or decimals. Do not round.) is given to not be random, Find the test statistic, zo. Z0 = (Round to two decimal places as needed.) Find the P-value.…
At CPU, it is estimated that fewer than 25% of the students have cars on campus. Does this seem to be a valid estimate if, a random sample of 90 college students, 28 are found to have cars? Use a 0.05 level of significance.
In a previous poll, 38% of adults with children under the age of 18 reported that their family ate dinner together seven nights. suppose that, in a more recent poll, 399 of 1099 adults with children under the age of 18 reported that their family ate dinner together seven nights a week. is there sufficient evidence that the proportion of families with children under the age of 18 who eat diner together seven nights a week has decreased? use the a=0.05 significance level
A simple random sample of front-seat occupants involved in car crashes is obtained. Among3000occupants not wearing seat belts,36were killed. Among 7697occupants wearing seat belts,18were killed. Use a0.05significance level to test the claim that seat belts are effective in reducing fatalities. Complete parts (a) through (c) below.
Cellulon, a manufacturer of home insulation, wants to develop guidelines for builders and consumers on how the thickness of the insulation in the attic of a home and the outdoor temperature affect natural gas consumption. In the laboratory, it varied the insulation thickness and temperature. A few of the findings are: Monthly Natural Gas Consumption (cubic feet), Thickness of Insulation (inches), Outdoor Temperature (ºF), y x1 x2 30.3 6.0 40.0 24.2 12 40 27.9 8 49 On the basis of the sample results, the regression equation is: yˆy⁢^⁢ = 56.26 − 0.66x1 − 0.59x2 How much natural gas can homeowners expect to use per month if they install 6 inches of insulation and the outdoor temperature is 40 degrees F? (Round your answer to 2 decimal places.) What effect would installing 7 inches of insulation instead of 6 have on the monthly natural gas consumption (assuming the outdoor temperature remains at 40 degrees F)? (Round your answers…
A 9-year-old girl did a science fair experiment in which she tested professional touch therapists to see if they could sense her energy field. She flipped a coin to select either her right hand or her left hand, and then she asked the therapists to identify the selected hand by placing their hand just under her hand without seeing it and without touching it. Among 304 trials, the touch therapists were correct 136 times. Use a 0.05 significance level to test the given hypotheses? HO: p = 0.5 HI: P < 0.5
What type of study is this? A first-year university unit wanted to give option of online teaching to determine whether online teaching improved learning outcomes. Students were allowed to enrol into online or on-campus classes. Grades at the end of semester were compared. Select one: O Experimental O Something else O Observational
The milk yield from two breeds of goats, A and B, is categorised as low, medium or high. One hundred goats in a random sample are classified according to breed and milk yield. The results are summarised in the table below. i. Explain the difference between a test of independence and a test of homogeneity ii. Perform a chi squared test, at the 95% of significance level, to determine whether there is an association between the breed of goats and the milk yield.
A study was made of 1,057 cases of poisoning in children treated as inpatients at Milwaukee Children's Hospital from 1962 through 1968. Data on date of occurrence, age and sex of the child, and type of agent involved were recorded and analyzed by standard statistical methods. Poisoning was due to ingestion of aspirin in 35 per cent of the children studied and to the ingestion of hydrocarbon distillates in 18 per cent. A statistically significant male dominance was found for ingestion of hydrocarbons; age-specific peaks were found for some categories. Trends as to the relative and absolute frequencies of each specific poison from one year to the next were noted; possible reasons for increasing or decreasing trends are discussed. Is this study descriptive or inferential? Explain your answer. What are the variables used in the study? In your opinion, what level of measurement was used to obtain the data from the variables? Does the article define the population? If so, how is it…
Five years ago 39% of children in a certain region lived with someone other than a parent. A sociologist wishes to test whether the current proportion is different perform the relevent test at 5% level of significance using the following data: in a random sample of 2,750 children, 119 lived with someone other than parent
A 9-year-old girl did a science fair experiment in which she tested professional touch therapists to see if they could sense her energy field. She flipped a coin to select either her right hand or her left hand, and then she asked the therapists to identify the selected hand by placing their hand just under her hand without seeing it and without touching it. Among 274 trials, the touch therapists were correct 116 times. Use a 0.05 significance level to test the given hypotheses? HO: p = 0.5 HI: P# 0.5

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