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Given the following data on the number of pints of ice cream sold at a local ice cream store for a 6-period time frame.
If the forecast for period 5 is equal to 275, use exponential smoothing with a=40 to compute a forecast for period 7.
Students in the capstone business policy class are assigned to teams of three. In how many different ways could a team contain exactly one student from each concentration?
For a given level of significance, if the sample size is increased: the power of the test will increase we will have more responses to log and calculate it will skew the mean to the right it has no effect on the direct results.
A soft-drink manufacturer claims that its 12-ounce cans do not contain, on average, more than 30 calories. A random sample of 16 cans of this soft drink, which were checked for calories
The test statistic for a two-sided significance test for a population mean is z = -2.12. What is the corresponding P -value?
Between what two values does the P -value of this test fall?
The company provide to ensure that an attempted call is blocked (because all circuits are busy) with probability less than 0.01? It is assumed that blocked calls are lost.
Test to see if four population means are the same or different. Assume the populations are normally distributed and have equal variances. Use the formal hypothesis-testing model. State the conclusion in statistical terms and in conversational English..
Drawing the standard normal curve and indicating the area representing the probability and
Population standard deviation of 150. If you take a random sample of n = 8 students, what is the probability that the sample mean will be more than 760?
A normal distributed population has a mean of 250 pounds and a standard deviation of 10 pounds. Given n = 20, what is the probability that this sample will have a mean value between 245 and 255 pounds?
How large a sample must one take to be 90% confident that the estimate is within 0.05 of the true proportion and find the 99% confidence interval of the population proportion of persons living in Phoenix who are obese.
Their mean monthly sales were $10,000 with a standard deviation of $1000. Construct a 95% confidence interval for the population mean.
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