here to solve this question we apply the assymptotic property for binomial random variate as for large n binomial tends to normal. the process is as
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The us. Department Transportation National ghway aff c Safety Adr i istration, eported that 77% of...
The U.S. Department of Transportation, National Highway
Traffic Safety Administration, reported that 77% of all fatally
injured automobile drivers were intoxicated. A random sample of 28
records of automobile driver fatalities in Kit Carson County,
Colorado, showed that 14 involved an intoxicated driver. Do these
data indicate that the population proportion of driver fatalities
related to alcohol is less than 77% in Kit Carson County? Use α =
0.01. Solve the problem using both the traditional method and the
P-value...
The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that 77% of all fatally injured automobile drivers were intoxicated. A random sample of 31 records of automobile driver fatalities in Kit Carson County, Colorado, showed that 18 involved an intoxicated driver. Do these data indicate that the population proportion of driver fatalities related to alcohol is less than 77% in Kit Carson County? Use α = 0.01. Solve the problem using both the traditional method and the P-value...
please
Women athletes at the a certain university have a long-term graduation rate of 67%. Over the past several years, a random sample of 37 women athletes at the school showed that 20 eventually graduated. Does this indicate that the population proportion of women athletes who graduate from the university is now less than 67%? Use a 1% level of significance. (a) What is the level of significance? 0.01 State the null and alternate hypotheses. Ho: p = 0.67; Hi:...
Are most student government leaders extroverts? According to Myers-Briggs estimates, about 82% of college student government leaders are extroverts. Suppose that a Myers-Briggs personality preference test was given to a random sample of 72 student government leaders attending a large national leadership conference and that 57 were found to be extroverts. Does this indicate that the population proportion of extroverts among college student government leaders is different (either way) from 82%? Use a = 0.01. (a) What is the level...
17. The U.S. Department of Transportation reported that 77% of all fatally injured automobile drivers were intoxicated. A random sample of 27 records of automobile driver fatalities in Kit Carson County, Colorado, showed that 15 involved an intoxicated driver. Do these data indicate that the population proportion of driver fatalities related to alcohol is less than 77% in Kit Carson County? Use a=.01. a) State the null and alternate hypotheses. b) What sampling distribution will you use? c) Compute the...
USA Today reported that about 47% of the general population in the United States is loyal to the automobile study of a random sample of 1002 Chevrolet owners and found that 489 said they would buy another Chevrolet. Does this indicate that the population proportion of consumers loyal to Chevrolet is more than 47%? Use α = 0.01 (a) What is the level of significance? OHo: p-0.47; H,: p 0.47 O Ho: p-0.47; H,: p> 0.47 O Ho: p >...
Is the national crime rate really going down? Some sociologists say yes! They say that the reason for the decline in crime rates in the 1980s and 1990s is demographics. It seems that the population is aging, and older people commit fewer crimes. According to the FBI and the Justice Department, 70% of all arrests are of males aged 15 to 34 yearst. Suppose you are a sociologist in Rock Springs, Wyoming, and a random sample of police files showed...
color blue. In fact about 24% of the population claim blue as their favorite color, t Suppose a random sample of n-53 college students were surveyed and r 10 of them said that blue is their favorite color. Does this information imply that the color preference of all college students is different (either way) from that of the general population? Use a - 0.05, (a) What is the level of significance? State the null and alternate hypotheses. Ho: p-0.24; Hi,...
Professor Jennings claims that only 35% of the students at Flora College work while attending school. Dean Renata thinks that the professor has underestimated the number of students with part- full-time jobs. A random sample of 81 students shows that 39 have jobs. Do the data indicate that more than 35% of the students have jobs? Use a 5% level of significance. What are we testing in this problem? single proportion single mean (a) What is the level of significance?...
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12. - POINTS BBUNDERSTAT128.3.009. MY NOTES ASK YOUR TEACHER Is the national crime rate really going down? Some sociologists say yes! They say that the reason for the decline in crime rates in the 1980s and 1990s is demographics. It seems that the population is aging, and older people commit fewer crimes. According to the FBI and the Justice Department, 70% of all arrests...