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The current population distribution of home prices in Martha's Vineyard has a mean of $650,000 and a standard deviation of $140,000, but the shape of this distribution is unknown. a) Variable: _______________________________ b) A random sample of 100 homes selected from Martha's Vineyard, calculate the mean and the standard deviation of the sampling distribution of sample mean and describe its shape. i.
1. if x is a binomial random variable with parameters n and p show that y n?x is also a binomial random variable. what
What is the probability that the sum of the two dice is 7 given that the first one is an even number? Show all work. Just the answer, without supporting work, will receive no credit. Are event A and event B independent? Explain.
Graph a relative frequency histogram for the 500 measurements summarized in the accompanying relative frequency table.
Describe the similarities between an F-ratio and a t statistic. The basic relationship between t statistic and F-ratios can be stated in an equation. What is that equation?
Which measure of central tendency would you use to summarize the data below? Which inferential test would you use to determine if there is a difference in rainfall between the sample 2 and 3?
the supplies for the construction of a reinforced concrete building are supplied by the company a and b. the company a
Construct a stem and leaf diagram with the last digit being a leaf and the first digit a stem. Repeat stem values twice.-
For the following data, verify that you do not reject with the ANOVA F testing with α = .05, but you do reject with Welch's test.- What might explain the discrepancy between the two methods?
Suppose that a quarter is randomly selected, what is the probability that this quarter has high productivity growth and has a large pay increase?
Recognize independent variable and dependent variable for this experiment. Think in your head what influences what? Or, what causes what? Cause is independent variable.
Select one of the applications of statistical forecasting methods listed in Table 20.1. Read the article describing the application in the indicated issue of Interfaces. Write a two-page summary of the application and the benefits it provided.
Results would be misused if wendys uses them to draw generalisation about the greater population or regard them as conclusive. Suggest and elaborate on two possible measures to glean such information.
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