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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.
assume that a set of test scores is normally distributed with a mean of 78 and a standard diviation of 10. what
assume that 25 of all business students at a large university invest in the stock market. a random sample of 120
A arbitrary sample of 8 students is selected. Illucidate the probability that among the students in the sample at least 7 are female.
Find the z score for a raw score of 550 given the following information: 554 sample mean, 30 sample standard deviation.
f no more than 5% of the containers are to weigh less than 15.8 oz, what must the standard deviation of the weights equal?
If the rainfall was recorded on 20 (instead of 10) randomly selected days throughout the year, the standard error of the mean would be equal to?
provide a numerical answer to each of the following questions and also show the calculations you used to find the
What is the probability that a simple random sample of automobile insurance policies will have a sample mean within 25 of the popluation mean.
Probability of Winning the Lottery: Because the California Fantasy 5 lottery is won by selecting the correct five numbers
A summary of data (deposits in thousands of dollars) from the survey is as follows: First National 1 = 4.1, σ1 = 1.2; City National 2 = 3.5, σ2 = 0.9. Use a 98% confidence interval to estimate the difference in the mean weekly deposits into IRAs f..
what will be the standard deviation of the share price if it is assumed that there is a 95% probability that the value will be at least 64?
The mean increase is $332, and the standard deviation is $108. Give a 99% confidence interval for the mean amount of the increase. Does omitting the annual fee induce customers to charge more on their credit cards?
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