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Weather forecast predicts May rainfall will be three to six inches: graph probability
Weather forecaster forecasts that May rainfall in local area will be between three and six inches but has no idea where within interval amount will be. Let x be amount of May rainfall in local area, and suppose that x is uniformly distributed over interval three to six inches.
a. Write down the formula for probability curve of x.b. Graph probability curve of x.c. Determine the probability that May rainfall will be at least four inches? at least five inches? At most 4.5 inches?
A salesperson goes door-to-door in a residential area to demonstrate the use of a new household appliance to potential customers. She has found from her years of experience that after demonstration, the probability of purchase (long run average) i..
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At a .10 level of significance, use Stat Tools (or Excel) to test the sponsors' hypothesis. State the null and the alternative hypotheses and the decision rule. Finally, discuss your findings.
For a sample with standard deviation of 10, a score of X = 44 corresponds to z-score of 0.50. Based on this info, determine the sample mean?
According to an IRS study, it takes an average of 330 minutes for taxpayers to prepare, copy, and electronically file a 1040 tax form. A consumer watchdog agency selects a random sample of 40 taxpayers and finds the standard deviation of the time ..
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Find the standard normal area for each of the following: (Round the answers to 4 decimal places.)
Assume a business researcherwishes to test hypothesis that greater proportion of marketing managers keep track of such obligations.
Is there evidence to suggest a difference in the mean waiting times at the four body shops?
A study conducted at a certain college shows that 53% of the school's graduates find a job in their chosen field within a year of graduation. Find the probability that among 7 randomly selected graduates, at least one finds a job in his or her cho..
Assuming the nurses surveyed were a random sample from the population of all nurses in the United States, we can use these data to test the null hypothesis H0 that there is no association between the row and column variables in this two-way table...
Does the data set represent a sample or a population? If it is a sample, describe the population from which it has been drawn.
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