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2. Suppose that the amount of time teenagers spend weekly working at part-time jobs is normally distributed with a stan...
2. Suppose that the amount of time teenagers spend working at part-time jobs is normally distributed...
2. Suppose that the amount of time teenagers spend working at part-time jobs is normally distributed with a standard deviation of 20 minutes. A random sample of 100 observations is drawn, and the sample mean computed as 120 minutes. Determine the 95% confidence interval estimate of the population mean.
suppose that the amount of time a teenagers spend on the internet is normally distributed with...
suppose that the amount of time a teenagers spend on the internet is normally distributed with a standard deviation of 1.5 hours. A sample of 100 teenagers is selected at random, and the sample mean computed as 6.5 hours. a. determine the 95% confidence interval estimate of the population mean. b. interpret what the confidence interval estimate tells you.
The amount of time that people spend at Grover Hot Springs is normally distributed with a...
The amount of time that people spend at Grover Hot Springs is normally distributed with a mean of 60 minutes and a standard deviation of 17 minutes. Suppose one person at the hot springs is randomly chosen. Let X = the amount of time that person spent at Grover Hot Springs . Round all answers to 4 decimal places where possible. a. What is the distribution of X? X ~ N( , ) b. Find the probability that a randomly...
An advertising executive wants to estimate the mean weekly amount of time consumers spend watching traditional...
An advertising executive wants to estimate the mean weekly amount of time consumers spend watching traditional television daily. Based on previous studies, the standard deviation is assumed to be 26 minutes. The executive wants to estimate, with 99% confidence, the mean weekly amount of time to within ±33 minutes. a. What sample size is needed? b. If 95% confidence is desired, how many consumers need to be selected? a. The sample size required for 99% confidence is ___
An advertising media analyst wants to estimate the mean weekly amount of time consumers’ spend watching...
An advertising media analyst wants to estimate the mean weekly amount of time consumers’ spend watching television daily. Based on previous studies, the standard deviation is assumed to be 20 minutes. The media analyst wasn’t to estimate, with 99% confidence, the mean weekly amount of time to within +/- 5 minutes. a) What sample sizes is needed b) If 95% confidence is desired, how many consumers need to be selected?
An advertising executive wants to estimate the mean weekly amount of time consumers spend watching traditional...
An advertising executive wants to estimate the mean weekly amount of time consumers spend watching traditional television daily. Based on previous studies, the standard deviation is assumed to be 22 minutes. The executive wants to estimate, with 99% confidence, the mean weekly amount of time to within ± 6 minutes. a. What sample size is needed? b. If 95% confidence is desired, how many consumers need to be selected? (Round up to the nearest integer.)
The amount of time adults spend watching television is closely monitored by firms because this helps...
The amount of time adults spend watching television is closely monitored by firms because this helps to determine advertising pricing for commercials. Complete parts (a) through (d). (a) Do you think the variable "weekly time spent watching television" would be normally distributed? If not, what shape would you expect the variable to have? O A. The variable "weekly time spent watching television" is likely normally distributed. OB. The variable "weekly time spent watching television" is likely skewed right, not normally...
Part 5: Central Limit Theorem (10 points) 5.1 The amount of time students spend in the...
Part 5: Central Limit Theorem (10 points) 5.1 The amount of time students spend in the library is log normally distributed with mean 25 minutes. You go to the library and ask 50 students how long they spent at the library and call the mean of their answers X1. You repeat this experiment for 45 days so that you have a set of numbers S = X1, X2, X3, ..., 45. Sketch the distribution (pdf) of the numbers in S....
This Quiz: 12 pts possible The amount of time adults spend watching television is closely monitored...
This Quiz: 12 pts possible The amount of time adults spend watching television is closely monitored by firms because this helps to determine advertising pricing for commercial Complete parts a) through () (a) Do you think the variable weekly time spent watching television would be normally distributed? If not, what she would you expect the variable to have? O A The variable weekly time spent watching television is likely normally distributed O B. The variable weekly time spent watching television...
The amount of time adults spend watching television is closely monitored by firms because this helps...
The amount of time adults spend watching television is closely monitored by firms because this helps to determine advertising pricing for commercials. Complete parts (a) through (d). (a) Do you think the variable "weekly time spent watching television" would be normally distributed? If not, what shape would you expect the variable to have? O A. The variable 'weekly time spent watching television is likely symmetric, but not normally distributed O B. The variable 'weekly time spent watching television is likely...
2. Suppose that the amount of time teenagers spend working at part-time jobs is normally distributed with a standard deviation of 20 minutes. A random sample of 100 observations is drawn, and the sample mean computed as 120 minutes. Determine the 95% confidence interval estimate of the population mean.
The amount of time adults spend watching television is closely monitored by firms because this helps to determine advertising pricing for commercials. Complete parts (a) through (d). (a) Do you think the variable "weekly time spent watching television" would be normally distributed? If not, what shape would you expect the variable to have? O A. The variable "weekly time spent watching television" is likely normally distributed. OB. The variable "weekly time spent watching television" is likely skewed right, not normally...
Part 5: Central Limit Theorem (10 points) 5.1 The amount of time students spend in the library is log normally distributed with mean 25 minutes. You go to the library and ask 50 students how long they spent at the library and call the mean of their answers X1. You repeat this experiment for 45 days so that you have a set of numbers S = X1, X2, X3, ..., 45. Sketch the distribution (pdf) of the numbers in S....
This Quiz: 12 pts possible The amount of time adults spend watching television is closely monitored by firms because this helps to determine advertising pricing for commercial Complete parts a) through () (a) Do you think the variable weekly time spent watching television would be normally distributed? If not, what she would you expect the variable to have? O A The variable weekly time spent watching television is likely normally distributed O B. The variable weekly time spent watching television...
The amount of time adults spend watching television is closely monitored by firms because this helps to determine advertising pricing for commercials. Complete parts (a) through (d). (a) Do you think the variable "weekly time spent watching television" would be normally distributed? If not, what shape would you expect the variable to have? O A. The variable 'weekly time spent watching television is likely symmetric, but not normally distributed O B. The variable 'weekly time spent watching television is likely...
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