From the adult male population of four large cities, random samples of* izes given below were taken and the number of married and single men recorded. Do thedata indicate any significant variations among the cities in the tendency of men to marry ?CityATotalMarried137164152147600Single32575635180Total169221208182780

Answered: Image /qna-images/answer/666a84c5-5030-42fc-95c8-abcdbbc87961.jpg

Answered: From the adult male population of four…

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 simple random sample of front-seat occupants involved in car crashes is obtained. Among 2806 occupants not wearing seat belts, 37 were killed. Among 7699 occupants wearing seat belts, 20 were killed. Use a 0.01 significance level to test the claim that seat belts are effective in reducing fatalities. Complete parts (a) through (c) below.
A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2769 occupants not wearing seat belts, 29 were killed. Among 7873 occupants wearing seat belts, 11 were killed. Use a 0.05 significance level to test the claim that seat belts are effective in reducing fatalities. Complete parts (a) through(c) below.
According to the American Diabetes Association,23.1% of Americans aged 60 years or older haddiabetes in 2007. A recent random sample of 200Americans aged 60 years or older showed that 52 ofthem have diabetes. Using a 5% significance level,perform a test of hypothesis to determine if thecurrent percentage of Americans aged 60 years orolder who have diabetes is higher than that in 2007.
A researcher is conducting a study on payment of property rate based on 255 randomly selected houses in a district. The table below, which is extracted from the researcher’s dataset, shows the ages of the houses (measured as “New”, “Quite New”, “Old”, “Very New”) and whether the owners of those houses pay property rate to the District Assembly. Using an alpha level of 5%, conduct a Chi-Squared test to establish whether there is a significant association between the age of the house and the payment of property rate.
Comfort Food Magazine states the average calories of a medium size hot dog is 209. The number of calories for a medium size hot dog is normally distributed. A random sample of 15 different brands of medium size hot dogs resulted in the following calorie count provided below. Can it be concluded that the average calories of a medium size hot dog will be 209 based on level significance of 0.01?
Guven, Elaimis, Binokay, and Tan (2003) studied the distribution of paw preferences in rats using a computerized food-reaching task. For a sample of n = 144 rats they found 104 right-handed animals (and thus 40 left-handed animals). Is this significantly different from what would be expected if right- and left-handed rats are equally common in the population? Test with an alpha level of 0.01.
In order to study the average number of continuous push-ups that his students can perform, a physical education teacher subjects 75 of them, chosen at random, to a test. The number of push-ups performed by each student, as well as their gender and whether or not they do sports outside school hours.The number of push-ups is known to be distributed according to a population variance norm 7.5.Can it be assumed considering a significance level of 5% that the mean number of push-ups performed by the students is 55?Make the respective graphMake the table with the classes and relative frequencies
The Excel file Room Inspection provides data for 100 room inspections at 25 hotels in a major chain. Management would like the proportion of nonconforming rooms to be less than 2%. Test an appropriate hypothesis to determine if management can make this claim. Sample Rooms Inspected Nonconforming Rooms Fraction Nonconforming 1 100 3 0.03 2 100 1 0.01 3 100 0 0.00 4 100 0 0.00 5 100 2 0.02 6 100 5 0.05 7 100 3 0.03 8 100 6 0.06 9 100 1 0.01 10 100 4 0.04 11 100 0 0.00 12 100 2 0.02 13 100 1 0.01 14 100 3 0.03 15 100 4 0.04 16 100 1 0.01 17 100 1 0.01 18 100 2 0.02 19 100 5 0.05 20 100 2 0.02 21 100 3 0.03 22 100 4 0.04 23 100 1 0.01 24 100 0 0.00 25 100 1 0.01
In a study of the birth order and intelligence, IQtests were given to 18- and 19-year old men toestimate the size of the difference, if any,between the mean IQs of firstborn sons andsecondborn sons. The following data for 10firstborn sons and 10 secondborn sons areconsistent with the means and standarddeviations necessary to conclude that thesamples come from populations that arenormally distributed.Firstborn: Secondborn:104 82 102 96 129 103 103 91 113 10289 114 107 89 103 103 92 90 114 113a. Construct a 90% confidence interval for thedifference in mean IQ between firstborn andsecondborn sons.b. Based on the confidence interval, is it reasonableto believe that firstborn sons and secondborn sons may have the same mean IQ. I need to know how to answer this on a TI84. 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 0.33.Suppose a random sample of 109 traffic fatalities in a certain region results in 47that 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 α=0.05 level of significance?
In a study to estimate the proportion of residents in a certain city and its suburbs who favor the construction of a nuclear power plant, it is found that 63 of 100 urban residents favor the construction while only 59 of 125 suburban residents are in favor. Is there a significant difference between theproportions of urban and suburban residents who favor construction of the nuclear plant? Use 0.01 level of significance
A survey of 30 r/s students in a large college indicated that 19 of them held off-campus jobs. Does this survey result provide strong evidence that more than 50% of all studentsin this college hold off-campus jobs? Use an appropriate p-value to draw and explain your conclusion.

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