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Kim's Nail Salon uses a weighted moving average method to forecast demand. She assigns a weight of 5 to the previous month's demand, 3 to demand two months ago, and 2 to demand three months ago. If demand was 800 customers in April, 900 customers in May, 1,200 customers in June, and 2,000 customers in July, what should her forecast for August be?
What is the mean fatigue life and its standard deviation - Plot a frequency histogram from these data and determine the range and standard deviation
poker is back. it is so popular that the internet is loaded with on-line poker sites. johnny c. is a poker enthusiast
Suppose that the population of all gasoline mileages is normally distributed with mean µ = 31.5 mpg and standard deviation σ = 0.8 mpg. Let y denote a mileage randomly selected from this population. Find the probabilities:
a variety of studies suggest that 10 of all people are left-handed. does the student survey data support this
Assuming normal populations with equal standard deviations, use the 0.05 level in evaluating Emily's suspicion. Using the appropriate statistical table, what is the approximate p-value for this test?
the owner of a small convenience store is trying to decide whether to discontinue selling magazines. he suspects that
consider the three samples listed in the tablea 153b 06252c 31263obtain the sample mean and the sample standard
Both estimates are obtained from independent random samples of 25 days. Conduct a test for equality of mean catch and report your p-value.
Comparisons among means for one factor in a two-way analysis. We have illustrated Tukey pairwise comparisons among all treatment means in both one-way and two-way settings. The method can also compare the mean responses to just one of the two fact..
We have the following information about the random variables X and Y
Use the argument forms presented in this section to structure the selections as specifically named arguments.- We cannot afford to close the library at Central Juvenile Hall.
An expert sharpshooter misses a target 5 percent of the time. Find the probability that she will miss the target for the second time on the fifteenth shot using
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