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In a random telephone survey to estimate the proportion of households with a personal computer, 720 out of 960 households responded that they did have a personal computer at home.
Provide a 90% confidence interval for the population proportion of households with a personal computer.
Calculate and post your 'answers' or interpretations of (a little bit of a review of the fundamental concepts): The three Measures of Center (Mean, Median, and Mode).
A normal random variable with a mean of $65.16 and a standard deviation of $10.00. What proportion of the households spent between $40.00 and $50.00.
The number of widgets produced by 9 employees in an eight hour shift is recorded as: 135, 120, 116, 119, 121, 125, 135, 131, 123. What is the median of the number of widgets produced presented above?
What is the probability that the individual is a male - are enjoying shopping for clothing and the gender of the individual statistically independent? Explain.
What is the probability there will be between 10 and 14 calls inclusive arriving at the company in the next 15 minutes?
A marketing firm asked a random set of married and single men as to how much they were willing to spend for a vacation. At *alpha*= .05, is a difference in the two amounts?
for problems 1-5 standardize the value according to the given average and sd. 1. x 10 average 5 and sd 2. 2. x 73
A prison official wants to estimate the proportion of cases of recidivism. In examining 250 convicts there are 65 cases. with 99% confidence interval what is the range? How do you figure this type of problem?
You're asked to determine whether the workers live in the community. Your personnel department provides the following table:
Sales are above 671,000 copies, and 10% of the time, sales are above 712,000 copies. Find the mean and the variance of annual sales.
Using the Empirical Rule for this data, what amount should be considered the cut-off for sales amounts being classi ed as unusually low?
To determine the public's opinion of the police department, the police chief obtains a cluster sample of 15 census tracts within his jurisdiction and samples all households in the randomly selected tracts. Uniformed police officers go door to door..
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