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A bank branch wants to estimate the proportion of all customers who visit the bank primarily to use the outdoor ATM. In a random sample of 300 customers, 223 had come to the branch primarily to use the ATM. Estimate the proportion of all customers who visit the branch to use the ATM with 95% confidence.
if we have a 95 confidence interval we have alpha2 below the confidence interval and alpha2 above the confidence
companies that sell stock mutual funds charge their investors expense fees to offset the costs of research and
A human society claims that less than 31% of U.S. households own a dog. In a random sample of 392 U.S. households, 155 say they own a dog. At a=0.03, is there enough evidence to support the society's claim?
The distribution of SAT scores is normal with a m=500 and a standard deviation of o=100. What SAT scores (X values) separate
Test scores on a university admissions test are normally distributed, with a mean of 500 and a standard deviation of 100. a) What is the probability that a randomly selected applicant scores between 425 and 575?
Calculate the test statistic (z-score) for the sample. What deccision should be made about the null hypothesis, and what decision should be made about the effect of the program.
a standard slot machine has three reels. the first reel has 3 walnuts 7 cherries 3 oranges 5 lemons 1 bell and 1
The pollsters can be 95% confident that the true proportion of adults who approve of human cloning is within what percentage of the estimated 11.7%?
allante pizza delivers pizzas throughout its local market area at no charge to the customer. however customers often
Historically, demand has been for 50, 100, or 150 units each week, so the company makes one of those run sizes. In the past, the manager of the department has made 100 units per week for regular production. A: Prepare a payoff table showing profit..
In 1992, FAA conducted 86,991 pre-employment drug tests on job applicants who were to be engaged in safety and security-related jobs, and found that 1,143 were positive.
Determine the mean production of acorn in the last six years and calculate the standard deviation of data relative to acorn production.
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