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For the Hawkins Company, the monthly percentages of all shipments received on time over the past 12 months are 80, 82, 84, 83, 83, 84, 85, 84, 82, 83, 84, and 83.
a) Construct a time series plot. What type of pattern exists in the data?
b) Compare a three-month moving average forecast with an exponential smoothing fore-cast for a = 0.2. Which provides the better forecasts using MSE as the measure of model accuracy?
c) What is the forecast for next month?
Calculate a 95% confidence interval for the population mean, based on the sample 10, 12, 13, 14, 15, 16, and 49. Change the number from 49 to 16 and recalculate the confidence interval. Using results, explain the effect of an outlier or extreme ..
Jamie expects that a bulb will last for 400 to 500 days, what is the probability of an Acme bulb satisfying that?
Is it sensible to conclude that this set of n=16 people is not representative random sample of registered voters?
By using 0.05 level of significance, is there any evidence of difference in mean life of bulbs produced by two kinds of machines?Calculate p-value and interpret its meaning.
What is the probability that a randomly selected tire will have a life of at least 30,000 miles?
We code middle-aged Americans as 1 and senior citizens as 0, the logistic regression model for senior citizens
Just, a case of food poisoning was traced to a particular restaurant chain. The source was identified and corrective actions were taken to make sure that the food poisoning would not reoccur. In spite of the response from the restaurant chain, man..
At the 0.01 level of significance, is there evidence to support the professor's claim?
Determine the variance of X? (Illustrate your computation either in Table or in Equation form)
Calculate the probability that the median of the sample or average medians is:
Calculate a standard error for the sample mean production rate for the new method and what is the standard error of the $1600 estimate?
Determine mean and standard deviation for number of erroneous returns per batch.
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