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The standard deviation of the sample is 2.5 calls. Using the .05 significance level, can we conclude that the mean number of calls per salesperson per week is more than 44?
the side containing the picture of the elephant came up twice as often as any other animal but that all the other animals came up equally often. Assuming there results were true, what the probabilit
The following table lists several types of graphs that we should be familiar with. What percentage of the data is above a certain value on one of the variables?
The value of lost timber is $4000 per square mile. Each person hired is paid $12 per hour, and it costs $30 to transport and supply each person with the appropriate equipment. Develop a model to det
Compute r^2, the percentage of variance accounted for by the gender difference, to measure effect size for this study.
Their first project consists of activities listed in the follow table. what is the probability that the project can be completed in 21 days?
Management believes that the standard deviation is 8 years. what the sample size they should take is ?
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Finds that the mean is x = 0.4278. She wants to test H0: μ = 0.5 Ha: μ ≠ 0.5 Find the associated P-value. Is the result significant at the 5% level (α = 0.05)? At the 1% level (&alpha
Perform an appropriate hypothesis test, showing the necessary calculations and/or explaining the process used to obtain the results.
Review the following Time Series Data set and then answer the question that follow. If Method (2)with a Lag value of 3 is used on this data set, what is the value of MSE and TCBF.
Allen is an appliance salesman who works on commission. A random sample of 39 days showed that the sample standard deviation value of sales was s = $215. How many more days should be included in the
The statewide incidence of gonorrhea is 50 per 100,000 over a 3 month period. Is the number of gonorrhea cases in this county unusual for this time period?
A report states that 40% of home owners had a vegetable garden. How large a sample is needed to estimate the true proportion of home owners who have vegetable gardens to within 4% with 95% confidenc
Assume that customers patronizing Pete's Gettem While They're Hot hot dog stand are binomially distributed by age (young = 18 or younger, and old = over 18). If 10 people visit Pete's on a typical d
At the .02 significance level, can we conclude that less than 84 percent of the orders are delivered in less than 10 minutes? What is the decision rule?
Suppose we are testing if the true mean amount of gas sold on a day is less than 900 gallons, at a 5% level of significance, what the value of z* would be ?
What is the advantage of a randomized experiment in which the investigators randomly assign treatment conditions to subject over an observational study in which the subject self-select the treatmen
What is the expected number that will arrive on time? What is the standard deviation of this distribution.
What is the probability that for a normal person a test will be at least 1.5 times as high as the upper limit of normal on two separate occasions?
Find a 95% confidence interval for the true proportion of voters who approve of the way the government is being run.
a shipment of 150 television sets contains three defective units. In how many ways can a vending company buy three of these units and receive (a) no defective units, (b) one defective unit, and (c)
Compare the means of population 1 and population 2. Are they equal? Show your test procedure.
Allen estimates that the probability of a good market is 0.4, the probability of a fair market is 0.4, and the probability of a bad market is 0.2, and he wishes to maximize his long-run average retu
An analysis of variance will be used to compare the three treatments. What null hypothesis is tested by this ANOVA F-test?