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The length (in pages) of math research projects is given below. Using this information, calculate the mean and the standard deviation regarding the data set as a sample.
sample mean =
sample standard deviation =
Now use the same data set, but this time regard it as a population. Calculate the mean and the standard deviation.
population mean =
population standard deviation =
Note: You can earn partial credit on this problem.
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Problem 10. (10 points) The length (in pages) of math research projects is given below. Using...
1 point) The length (in pages) of math research projects is given below. Using this information, calculate the mean and the standard deviation regarding the data set as a sample. 33, 17, 18, 19, 24, 30, 17, 21, 14 sample mean sample standard deviation Now use the same data set, but this time regard it as a population. Calculate the mean and the standard deviation. population mean population standard deviation
Lecture 19: Problem 9 Problem List Next Previous (1 point) A market research company wanting to determine the average quantity of nuts eaten per year by Americans interviewed 730 Americans and found a sample mean of 3.85 lb. If the company knows that the population standard deviation is 0.85, what is the 92% confidence interval for the population mean? Round your answers to two decimal places. Note: You can earn partial credit on this problem. Note: You can get a...
Problem 3. (1 point) Consider the following data set. Find the mean and standard deviation. Data set: 37, 78, 69, 38, 59, 26,51 Mean: Standard deviation: Note: You can earn partial credit on this problem.
Problem 8. (1 point) a) A random sample of 10 cans of peach halves has a mean weight of 16 ounces and standard deviation of 0.4 ounces. Find a 80 % confidence interval for a true standard deviation of the weights of all cans of peach halves. Confidence interval: b) What would be the confidence interval for a true standard deviation if the sample size was 45? Confidence interval: Note: You can earn partial credit on this problem. preview answers...
Problem List Previous Problem Next Problem (4 points) When parking a car in a downtown parking lot, drivers pay according to the number of hours or fraction thereof. The probability distribution of the number of hours cars are parked has been estimated as follows: x 12 3456 78 P(X) 0.224 0.128 0.102 0.088 0.064 0.03 0.020.344 A. Mean B. Standard Deviation = The cost of parking is 4.25 dollars per hour. Calculate the mean and standard deviation of the amount...
Previous Problem Problem List Next Problem (20 points) The hemoglobin count (HC) in grams per 100 milliliters of whole blood is approximately normally distributed with a population mean of 14 for healthy adult women. Suppose a particular female patient has had 17 laboratory blood tests during the past year. The sample readings showed an average HC of 17.98 with a standard deviation of 2.52. Does it appear that the population average HC for this patient is not 147 (a) State...
least one of the answers above is NOT correct. 1 point) Use the given data to find the 95% confidence interval estimate of the population mean. Assume that the population has a normal distribution Q scores of professional athletes: Sample size n 15 Mean 106 Standard s 12 Note: You can earn partial credit on this problem. Your score was recorded. You have attempted this problem 1 time. You Your overall recorded score is 096. a score of 0% for...
Lecture18: Problem 5 Previous Problem List Next (1 point) The systolic blood pressure (SBP) of a certain population is normally distributed with standard deviation 5 mmHg. A sample of 25 members of this population was found to have an average SBP of 118 mmHg. Find a 90% confidence interval for the population mean. Round the endpoints to the nearest integer. Confidence interval is Note: You can earn partial credit on this problem. Note: You can get a new version of...
Lecture19: Problem 2 Previous Problem List Next (1 point) John measured the total playing time of 25 randomly chosen CDs from his very large collection and found a mean of 65.2 minutes and a standard deviation of 11.4 minutes. Give the 97% confidence interval for the population mean, assuming that the population is approximately normally distributed. Round the endpoints to two decimal places. Confidence interval:( Note: You can earn partial credit on this problem. Note: You can get a new...
Problem 8. (15 points) Let x be a random variable that represents the hemoglobin count (HC) in human blood (measured in grams per milliliter). In healthy adult females, x has an approximately normal distribution with a population mean of u = 14.2, and population standard deviation of o = 2.5. Suppose a female patient had 10 blood tests over the past year, and the sample mean HC was determined to be x = 15.1. a. What is the value of...