Worksheet Chapters 7, 8, & 9 According to the National Association of Theater Owners, the average price for a movie in the United States in 2012 was $7.96. Assume the population standard deviation is $0.50 and that a sample of 30 theaters was randomly selected. 97.9b eraae a. Calculate the standard error of the mean. b. What is the probability that the sample mean will be less than $7.75? c. What is the probability that the sample mean will be less than $8.10? d. What is the probability that the sample mean will be more than $8.20? . 30 2. The weight of NFL players has increased steadily, gaining up to 1.5 lbs. per year since 1942. According to ESPN, the average weight of a National Football League (NFL) player is now 252.8 lbs. Assume the population standard deviation is 25 lbs. A random sample of 38 NFL players are selected. a. Calculate the standard error of the mean. b. What is the probability that the sample mean will be less than 246 lbs.? c. What is the probability that the sample mean will be more than 249 lbs.? d. What is the probability that the sample mean will be between 254 and 258 Ibs.? e. Identify the symmetrical interval that includes 95% of the sample means if the true population mean is 252.8 lbs. On Campus Research recently reported that 46% of college students aged 18-24 would spend their spring breaks relaxing at home. A sample of 155 college students was selected.
Worksheet Chapters 7, 8, & 9 According to the National Association of Theater Owners, the average price for a movie in the United States in 2012 was $7.96. Assume the population standard deviation is $0.50 and that a sample of 30 theaters was randomly selected. 97.9b eraae a. Calculate the standard error of the mean. b. What is the probability that the sample mean will be less than $7.75? c. What is the probability that the sample mean will be less than $8.10? d. What is the probability that the sample mean will be more than $8.20? . 30 2. The weight of NFL players has increased steadily, gaining up to 1.5 lbs. per year since 1942. According to ESPN, the average weight of a National Football League (NFL) player is now 252.8 lbs. Assume the population standard deviation is 25 lbs. A random sample of 38 NFL players are selected. a. Calculate the standard error of the mean. b. What is the probability that the sample mean will be less than 246 lbs.? c. What is the probability that the sample mean will be more than 249 lbs.? d. What is the probability that the sample mean will be between 254 and 258 Ibs.? e. Identify the symmetrical interval that includes 95% of the sample means if the true population mean is 252.8 lbs. On Campus Research recently reported that 46% of college students aged 18-24 would spend their spring breaks relaxing at home. A sample of 155 college students was selected.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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