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A survey reported in Time magazine included the question ‘‘Do you favor a federal law requiring a 15 day waiting period to purchase a gun?" Results from a random sample of US citizens showed that318 of the 520 men who were surveyed supported this proposed law while 379 of the 460 women sampled said ‘‘yes".
Use this information to find a 95% confidence interval for the difference in the two proportions, Pm-Pw, where Pm is the proportion of men who support the proposed law and Pw is the proportion of women who support the proposed law.
for the following managerial dilemmas formulate a research problem and plan the findings of which will aid the decision
For a population with a mean of (u)=50 and a standard deviation of (o)=10, how much error on average would you expect between the sample mean (M) and the population mean for the following samples
a population is normal with a variance of 17. suppose you wish to estimate the population mean u. find the sample size
A further analysis of differences between every pair of groups was reported as all p 0.01.9 Interpret these reported ?ndings. What were the degrees of freedom for Factor, Error, and Total?
While in July the mean high temperature is 74oF and the standard deviation is 8oF. In which month is it more unusual to have a day with a high temperature of 55oF?
Find the probability of winning jackpot?
Repeat this process 10 times or you can draw 10 samples simultaneously using StatTools. Make a histogram of the 10 values of sample means. You are constructing the sampling distribution of sample means. What is the center of your histogram?
the number of telephone calls coming into a businesss switchboard averages 4 calls per minute. let x be the number of
U1, U2,... are independent identically distributed uniform random variables with parameters 0 and 1. (a) Let Xi = - ln Ui. What is P[Xi > x]?
Describe a situation that might be viewed differently by two people. This event can be as minor as an encounter on the street or as major as the birth of a child.
No information is available about its value. How large a sample size is needed to estimate it to within 0.15 with 99% confidence?
how large of a sample size do we need to estimate the mean annual income of native americans in onondaga county new
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