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According to a recent survey, about 33% of people polled said they would likely purchase reusable cloth bag for gorceries. Suppose 45 shoppers are interviewd. What is the probability that no more than 28% of shoopers say they are likely to purchase the bags?
Find a z score for which the area under the standard normal curve from -z to z is 50%. (b) Find the range of scores which will be assigned a grade of C.
The average number of customer complaints at the Full Moon Motel is five per day. Find the probability that on a typical day, the motel will receive
The amount of time a bank teller spends with each customer is normally distributed with a mean of 3.10 minutes and a standard deviation of 0.40 minutes.
How can i find the mean of the remaining observation if the mean of 30 observation is 5
State the null hypothesis and the alternative hypothesis and compute the value of the test statistic and what is your decision regarding the null hypothesis?
A meteorologist wishes to estimate the mean amount of snowfall per year in Spokane, Washington. A random sample of the recorded snowfalls for 20 years from a 140 year period produces a sample mean equal to 54.03 inches, with a standard deviation of 9..
how large a sample is needed to guarantee that the distribution of sample means is approximately normally distributed?
Make a forecast for 2005, using a trend model of your choice or a judgment forecast. Discuss. Note: Time increments are 5 years, so use t = 6 for your 2005 forecast.
The following frequency distribution was obtained. The data values are in hours. Construct a histogram for the data .
In a regression analysis, if a new independent variable is added and R-squared increases and adjusted R-squared decreases precipitously, what can be concluded?
Given are five observations collected in a regretion study on two variables: What is the value of the standard error of the estimate?
Standard deviation of 2.5 minutes. What does Chebyshev's Theorem say about the percentage of employees with commuting times between 58.6 minutes and 68.6 minutes?
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