One survey showed that among 800 randomly selected subjects who completed four years of college, 12%...
One survey showed that among 800 randomly selected subjects who completed four years of college, 12% smoked. Use a 0.01 significance level to test the claim that the rate of smoking among those with four years of college is less than the 15% rate for the Canadian population
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One survey showed that among 800 randomly selected subjects who
completed four years of college, 12%...
For each of the following write a hypothesis test by following the handout The Steps in...
For each of the following write a hypothesis test by following the handout The Steps in Hypothesis Testing. 1) Smoking and College Education A survey showed that among 785 randomly selected subjects who completed four years of college that 145 of them smoke. I n the general population the smoking rate is 27%. (based on data from the American Medical Association). Use a 1% level of significance to test the claim that the rate of smoking among those with four...
In a survey, among 300 randomly selected single women, 69 of them said that they "definitely...
In a survey, among 300 randomly selected single women, 69 of them said that they "definitely want to get married." In the same survey, among 400 randomly selected single men, 120 of them gave that same response. Assume that these samples are independent. Use a 0.01 signifficant level and the P-value method to test the claim that the proportion of single women who definitely want to get married is different from the one of single men who definitely want to...
In a survey of 180 females who recently completed high school, 75% were enrolled in college....
In a survey of 180 females who recently completed high school, 75% were enrolled in college. In a survey of 160 males who recently completed high school, 65% were enrolled in college. At a = 0.06, can you reject the claim that there is no difference in the proportion of college enrollees between the two groups? Assume the random samples are independent. Complete parts (a) through (@). (a) Identify the claim and state Ho and H. The claim is "the...
A survey conducted five years ago by the health center at a university showed that 5.9%...
A survey conducted five years ago by the health center at a university showed that 5.9% of the students smoked cigarettes at the time. This year a new survey was conducted on a random sample of 600 students from this university, and it was found that 33 of them smoke cigarettes. Test the claim that the percentage of students who smoke cigarettes at this university is less than it was five years ago. Use a significance level of 0.02. a....
The government of an impoverished country reports the mean age at death among those who have...
The government of an impoverished country reports the mean age at death among those who have survived to adulthood as 66.2 years. A relief agency examines 30 randomly selected deaths and obtains a mean of 62.3 years with standard deviation 8.1 years. Test whether the agency’s data support the alternative hypothesis, at the 1% level of significance, that the population mean is less than 66.2. What is the null and alternate hypothesis as well as the claim? Interpret your results
Question 2: A survey of 800 randomly selected senior citizens showed that 55% said they planned...
Question 2: A survey of 800 randomly selected senior citizens showed that 55% said they planned to watch the upcoming town hall debate on television. The margin of error for the 95% confidence interval is 3.5 percentage points. Part 1 (calculation) Write down the 95% confidence interval for the proportion of all senior citizens who plan to watch the upcoming debate on television. Be sure to show your work. Part 2 (interpretation) Does the confidence interval support the claim that...
Among drivers who have had a car crash in the last year, 300 were randomly selected...
Among drivers who have had a car crash in the last year, 300 were randomly selected and categorized by age, with the results listed in the table below. Age Under 25 25-44 45-64 Over 64 Drivers 115 78 39 68 If all ages have the same crash rate, we would expect (because of the age distribution of licensed drivers) the given categories to have 16%, 44%, 27%, 13% of the subjects, respectively. At the 0.1 significance level, test the claim...
The California Health Survey involved 51,048 randomly selected adults in California. The author selected 100 of...
The California Health Survey involved 51,048 randomly selected adults in California. The author selected 100 of those subjects and obtained these results. Among the 53 females, the mean height is 63.7 in. and the standard deviation is 4.5 in.: among the 47 males, the mean height is 69.2 in. and the standard deviation is 3.1 in. Test the claim that the mean height of an adult California female is greater than the mean height of an adult California male when...
A survey of 1,680 randomly selected adults showed that 549 of them have heard of a...
A survey of 1,680 randomly selected adults showed that 549 of them have heard of a new electronic reader. The accompanying technology display results from a test of the claim that 37% of adults have heard of the new electronic reader. Use the normal distribution as an approximation to the binomial distribution, and assume a 0.01 significance level to complete parts a through e Sample proportion: 0.326786 Test statistic Critical z: P-Value z:-3.6687 ± 2.5758 0.0002 a. Is the test...
A poll of 2,084 randomly selected adults showed that 94% of them own cell phones. The...
A poll of 2,084 randomly selected adults showed that 94% of them own cell phones. The technology display below ret from a test of the claim that 92% of adults own cell phones. Use the normal distribution as an approximation to the bin distribution, and assume a 0.01 significance level to complete parts (a) through (e). Test of p = 0.92 vs p+0.92 Z-Value P-value Sample p 95% CI N Sample X 0.000 4.01 (0.930869,0.956847) 1 1967 2,084 0.943858 a....
In a survey of 180 females who recently completed high school, 75% were enrolled in college. In a survey of 160 males who recently completed high school, 65% were enrolled in college. At a = 0.06, can you reject the claim that there is no difference in the proportion of college enrollees between the two groups? Assume the random samples are independent. Complete parts (a) through (@). (a) Identify the claim and state Ho and H. The claim is "the...
A survey conducted five years ago by the health center at a university showed that 5.9% of the students smoked cigarettes at the time. This year a new survey was conducted on a random sample of 600 students from this university, and it was found that 33 of them smoke cigarettes. Test the claim that the percentage of students who smoke cigarettes at this university is less than it was five years ago. Use a significance level of 0.02. a....
The California Health Survey involved 51,048 randomly selected adults in California. The author selected 100 of those subjects and obtained these results. Among the 53 females, the mean height is 63.7 in. and the standard deviation is 4.5 in.: among the 47 males, the mean height is 69.2 in. and the standard deviation is 3.1 in. Test the claim that the mean height of an adult California female is greater than the mean height of an adult California male when...
A survey of 1,680 randomly selected adults showed that 549 of them have heard of a new electronic reader. The accompanying technology display results from a test of the claim that 37% of adults have heard of the new electronic reader. Use the normal distribution as an approximation to the binomial distribution, and assume a 0.01 significance level to complete parts a through e Sample proportion: 0.326786 Test statistic Critical z: P-Value z:-3.6687 ± 2.5758 0.0002 a. Is the test...
A poll of 2,084 randomly selected adults showed that 94% of them own cell phones. The technology display below ret from a test of the claim that 92% of adults own cell phones. Use the normal distribution as an approximation to the bin distribution, and assume a 0.01 significance level to complete parts (a) through (e). Test of p = 0.92 vs p+0.92 Z-Value P-value Sample p 95% CI N Sample X 0.000 4.01 (0.930869,0.956847) 1 1967 2,084 0.943858 a....
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