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The manager of a fast food restaraunt wants to determine whether the population mean waiting time to place an order ha changed in the past month from its previous value of 3.7 minutes. A random sample of 64 orders shows a mean waiting time of 4.0 minutes. It is known from past experience that the population standard deviation of waiting time is o = 1.15 minutes
Formulate and test the appropriate hypotheses using the p-value approach. What is the p-value for the test? Should the research firm reject the null hypotheses at a=0.05? What conclusion should they make?
An article in Money compares investment in an income annuity, offered by insurance companies, and a mix of low-cost mutual funds.
the average weight of adult men is 181 pounds with a standard deviation of 40 pounds.thirty five 35 men were asked
What model might you suggest to model the number of purchases per minute? What is the probability that in any one minute at least one purchase is made? What is the probability that no one makes a purchase in the next 2 minutes?
All hired killers are criminals who deserve the death penalty. Therefore, all criminals who deserve the death penalty are hired killers.
an experimenter wants to conduct a hypothesis test on a claim that there was no difference between two population
Impact of Uncertainty on MNC Value Minneapolis Co. is a major exporter of products to Canada. Today, an event occurred that has increased the uncertainty surrounding the Canadian dollar's future value over the long term. Explain how this event ca..
What percent of the sample means will be greater than 162 seconds? What percent of the sample means will be greater than 153 but less than 162 seconds?
Assuming your sample is valid, what is the upper bound of a 95% confidence interval for the population proportion of customers who are less than 30 years old?
Calculate the correlation coefficient and test for significance and calculate the Pearson product-moment correlation coefficient and test for significance
the acceptable level for insect filth in a certain food item is 4 insect fragments per 10 grams. a sample random of 50
a. what is the point estimate of the population mean? b. what is the point estimate of the population standard deviation?
Calculate a 99% confidence interval for the difference between males and females in mean number of science courses planned. Interpret your interval.
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