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Suppose that the average monthly pay for U. S. production worker is 2000$.Assume that available date indicate that production worker wages normally distributed with a standard deviation of 400$ .Suppose that a simple random sample of sides n=64 workers is selected and the sample mean weekly pay x is used to estimate the population mean weekly pay. a)show the sampling distribution of x (indicate the mean , standard deviation and the shape -draw the picture) b)what is the probability that the sample mean monthly pay will be between +-75$ of the population mean?
The American Sugar Producers Association wants to estimate the mean yearly sugar consumption. A sample of 16 people reveals the mean yearly consumption to be 60 pounds with a standard deviation of 20 pounds. What is the value of the population mea..
56% are enrolled in school. If a sample of 500 such children is randomly selected, find the probability that at least 250 will be enrolled in school.
Determine the coefficient of correlation. Interpret the relationship between BAC and age using the correlation coefficient. Determine the coefficient of determination. Interpret.
What are the differences between probability distribution functions and probability density functions? Why do we care?
Part 1: Define and explain historical research. Explain a situation in which historical research would be appropriate. Part 2: Explain the difference between external and internal evidence and give examples of each.
1.some researchers have conjectured that stem-pitting disease in peach tree seedlings might be controlled with weed and
Using thesedata, perform a simple regression analysis to predict the price of a digital camera using the number of effective megapixels. Interpret the slope term and state whether it is consistent with the buyer's prior belief.
Second treatment had M = 52 with s^2 = 36. Do these data point to significant difference between two treatments? Use the two-tailed test with α = .05.
Create a 95% confidence interval for population proportion of positive drug tests.
You may assume the sample data comes from a population that follows a normal distribution. Using a .05 level of significance test the company's claim.
How many degrees of freedom must researcher use in her t-test critical value supposing that variances are equal?
Only 3 reported that their health was excellent. Find the probability that when 13 adults are randomly selected, 3 or fewer are in excellent health.
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