A group of parents examines a random sample of insurance bills in order to determine if...

A group of parents examines a random sample of insurance bills in order to determine if there is evidence to suggest that the cost of auto insurance for teenage boys costs more, on average, than for teenage girls. The mean annual cost for 42 teenage boys was $619. For 37 teenage girls, it was $579. From past years, it is known that the population standard deviation for each group is $150. Does this data provide evidence at a significance level of alpha equals 0.05 that the mean cost for auto insurance for teenage boys is greater than that for teenage girls?

Solutions

Expert Solution

orchestra answered 2 years ago

Next > < Previous

Related Solutions

In order to determine the load capacity of a lift, a random sample of 15lifts are...

In order to determine the load capacity of a lift, a random sample of 15lifts are stress tested and the maximum weight that each life can bear before malfunctioning is recordedas the “Maximum Load”. Suppose thatthe mean of the maximum load is1279 pounds and the standard deviation of the maximum loadis 123 pounds. a.Verify that the conditions for constructing confidence intervals for the mean are met. b.Compute and interpret a 99% confidence interval for the mean of the maximum weight...

In a study of parents who have children with ADHD, a simple random sample of parents...

In a study of parents who have children with ADHD, a simple random sample of parents were asked to rate their overall stress level. A higher score indicates greater stress. The mean rating for the 50 parents in the study was reported to be 46.8 with a standard deviation of 10.34. The researchers considered a score greater than 45 to represent extreme stress. Is there evidence that the mean stress level for the parents in this study is above this...

Actuaries at an insurance company must determine a premium for the type of insurance. A random...

Actuaries at an insurance company must determine a premium for the type of insurance. A random sample of 40 potential purchasers of this type of insurance were foundto have suffered the following values of losses (in dollars) during the past year. These losses would have been covered by the insurance if it were not available. 100 32 0 0 470 50 0 14589 212 93 0 0 1127 421 0 87 135 420 0 250 12 0 309 0 177...

A pediatrician asked a random sample of parents to report how long it took their toddler...

A pediatrician asked a random sample of parents to report how long it took their toddler to fall asleep at night. Among 51 toddlers the mean time to fall asleep at night was 23.4 minutes with a standard deviation of 6.7 minutes. Fill in the missing values (rounded to one digit after the decimal point) to estimate the parameter. Using 95% confidence, the mean time to fall asleep among all toddlers is between ______ and ______.

The nonprofit group Public Agenda conducted telephone interviews with a stratified sample of parents of high...

The nonprofit group Public Agenda conducted telephone interviews with a stratified sample of parents of high school children. There were 202 black parent, 202 Hispanic parents, and 201 white parents. ONe question asked was, “Are the high schools in your state doing an excellent, good, fair, or poor job, or you don’t know enough to say?” Here are the survey results: Black Hispanic White Total Excellent 12 34 22 68 Good 69 55 81 205 Fair 75 61 60 196...

A group of students measure the length and width of a random sample of beans. They...

A group of students measure the length and width of a random sample of beans. They are interested in investigating the relationship between the length and width. Their summary statistics are displayed in the table below. All units, if applicable, are millimeters. Mean width: 7.647 Stdev width: 0.942 Mean height: 13.924 Stdev height: 1.703 Correlation coefficient: 0.7443 a) The students are interested in using the width of the beans to predict the height. Calculate the slope of the regression equation....

A group of students measure the length and width of a random sample of beans. They...

A group of students measure the length and width of a random sample of beans. They are interested in investigating the relationship between the length and width. Their summary statistics are displayed in the table below. All units, if applicable, are millimeters. Mean width: 7.439 Stdev width: 0.88 Mean height: 13.625 Stdev height: 1.825 Correlation coefficient: 0.7963 a) The students are interested in using the width of the beans to predict the height. Calculate the slope of the regression equation....

Refer to the random sample of customer order totals with an average of $78.25 and a...

Refer to the random sample of customer order totals with an average of $78.25 and a population standard deviation of $22.50. a. Calculate percent 90 confidence interval estimate of the mean, given a sample size of 40 orders. b. Calculate 9 0 percent confidence interval for the mean, given the sample size of 75 orders. c. Explain the difference. d. Calculate the minimum sample size needed to identify a %90 confidence interval for the mean, assuming a $5.00 margin of...

Conduct a simple random sample of 8 individuals from a total group of 155. Select random...

Conduct a simple random sample of 8 individuals from a total group of 155. Select random numbers across first row from left to right. 71174 41095 08436 81238 65154 47913 48354 91190 28819 05606 83605 50503 25054 47995 28364 15702 22782 03263 10493 99337 06453 38712 77669 50289 please explain the answer .

a) In order to determine the average price of hotel rooms in Atlanta, a sample of...

a) In order to determine the average price of hotel rooms in Atlanta, a sample of 61 hotels were selected. It was determined that the average price of the rooms in the sample was $111.9. The population standard deviation is known to be $19. We would like to test whether or not the average room price is significantly different from $110. Compute the test statistic. b) In order to determine the average price of hotel rooms in Atlanta, a sample...

Subjects