Here is a sample of amounts of weight change (kg) of college students in their freshman year: 13,...
Here is a sample of amounts of weight change of college students in their freshman year: 10,9, 8, -3, where - 3 represents a loss of 3 kg and positive values represent weight gained. Here are ten bootstrap samples: (10, 10, 10, 8). (10,-3, 8, 10) (10.-3.9,8). 19, -3, 8, 109, 188, 8, 9), 19.-3.9, -3). (10,9 -3.8) (-3,9, -3,9), -3,8 -3.9), 19, 10, 10, 10). Complete parts (a) and (b) below a. Using only the ten given bootstrap samples,...
A survey asked college freshman how far away from their hometown is from the college campus. A random sample of 36 students is taken with a mean distance of 100 miles and a standard deviation of 30 Complete parts (a) and (b) below (a) Find the 95% confidence interval for the population mean Lower bound Upper bound (Round your answer to one decimal place) (b) Suppose you want the estimate to be within 3 miles of the population mean. Determine...
1/ In a survey of 1006 adults, a polling agency asked, "When you retire, do you think you will have enough money to live comfortably or not. Of the 1006 surveyed, 526 stated that they were worried about having enough money to live comfortably in retirement. Construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement. Select the correct choice below and fill in the answer boxes to...
A survey asked college freshman how far away from their hometown is from the college campus. A random sample of 3 students is taken with a mean distance of 100 miles and a standard deviation of Complete parts (a) and (b) below (a) Find the 95% confidence interval for the population mean Lower bound Upper bound Round your answer to one decimal place) (6) Suppose you want the time to be within 3 mies of the population mean Determine the...
Following are the weights of 32 college students (in kg). 56 73 75 49 82 68 72 91 93 78 63 88 82 75 84 73 67 68 79 91 82 76 80 67 79 80 91 86 90 67 82 75 Construct a 95% confidence interval estimate of the population standard deviation. Round your final answer to one decimal place, and write in interval notation.
The grade point averages (GPA) for 12 randomly selected college students are shown on the right. Complete parts (a) through (c) below. Assume the population is normally distributed. 2.1, 3.1, 2.6, 1.5, 0.6, 4.0, 2.1, 1.1, 3.6, 0.5, 2.1, 3.4 construct a 90% confidence interval for the population mean The grade point averages (GPA) for 12 randomly selected college students are shown on the right. Complete parts (a) through (c) 2.1 below. 1.5 Assume the population is normally distributed. 2.1...
A sample of 13 small bags of the same brand of candies was selected. Assume that the population distribution of bag weights is normal. The weight of each bag was then recorded. The mean weight was 2 ounces with a standard deviation of 0.12 ounces. The population standard deviation is known to be 0.1 ounce. NOTE: If you are using a Student's t-distribution, you may assume that the underlying population is normally distributed. (In general, you must first prove that...
In a random sample of ten people, the mean driving distance to work was 18.6 miles and the standard deviation was 6.5 miles. Assume the population is normally distributed and use the t-distribution to find the margin of error and construct a 90% confidence interval for the population mean . Interpret the results. Identify the margin of error. (Round to one decimal place as needed.) Construct a 90% confidence interval for the population mean (Round to one decimal place as...
A certain test preparation course is designed to help students improve their scores on the GMAT exam. A mock exam is given at the beginning and end of the course to determine the effectiveness of the course. The following measurements are the net change in 6 students' scores on the exam after completing the course: 11, 10, 17, 8, 37, 19 Using these data, construct a 90 % confidence interval for the average net change in a student's score after...
A certain test preparation course is designed to help students improve their scores on the GMAT exam. A mock exam is given at the beginning and end of the course to determine the effectiveness of the course. The following measurements are the net change in 55 students' scores on the exam after completing the course: 14,29,24,10,17 Using these data, construct a 90%confidence interval for the average net change in a student's score after completing the course. Assume the population is...