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According to a recent survey, about 33% of Americans polled said that they would likely purchase reusable cloth bags for groceries in order to reduce plastic waste. Suppose 45 shoppers are interviewed at a local supermarket. Which of the following statements is (are) true about the c?
A. The sampling distribution can be described by the normal model.
B. The mean of the sampling distribution is 0.33.
C. The standard deviation of the sampling distribution is 0.0701.
D. All of the above
E. Only A and B
At the 5 percent level of significance, does this sample prove a violation of the guideline that the average patient should pay no more than $250 out-of-pocket? State your hypotheses and decision rule.
let x denote a geometric random variable with parameter p. for s gt0 compute ee-sx. for what other values of s is your
incomes in a certain town are strongly-right skewed with mean 36000 and standard deviation 7000. a random sample of 10
Assume that 60 percent of the voters in a particular region support a candidate. Find the probability that a sample of 1,000 voters will yield a sample proportion in favor of the candidate within 4 percentage points of the actual proportion.
if you were constructing a 99 confidence interval of the population mean based on a sample of n25 where the standard
Find a 99% confidence interval for the mean pH in rainfall and interpret the interval and what assumption must be made for the confidence interval to be valid?
Develop the estimated regression equation that can be used to predict the closing price given the value of Period At the .05 level of significance, test for any positive autocorrelation in the date.
question a bank recorded the number of atm transactions made by its customers in one day. the number x of daily atm
Assume the sample is taken from a normally distributed population. Construct 98% confidence intervals for (a) the population variance o2 and (b) the population standard deviation.
Tthen calculate the 95% and 99% CIs for the proportion of all female Hispanic drivers in Boston who wear seatbelts. Why is the 99% CI wider than the 95% CI?
Scores of an aptitude test are normally distributed with a mean of 280 and a standard deviation of 30. Determine the percentage of samples of size 4 that have a mean score within 21 points of the population mean score of 280.
question 1. examined the effect of body position on blood pressure 32 participants had their blood pressures measured
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