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A random sample of 100 pumpkins is obtained and the mean circumference is found to be 40.5 cm. Assuming that the population standard deviation is known to be 1.6 cm, use a 0.05 significance level to test the claim that the mean circumference of all pumpkins is equal to 39.9 cm. 1. State the null hypothese 2. state the alternative 3. Identify the test statistic 4. Find the P-value 5. What is the conclusion regarding the null hypothesis? 6. What is the final conclusion that addresses the original claim?
A sample of n = 5 scores has a mean of M = 12. If one person with a score of X = 8 is removed from the sample, what will be the value of the new mean?
What is meant by a probability distribution? Discuss how you could use one of the text probability distribution at your workplace to help solve a business problem.
What measure of central tendency is most sensitive to skewness and which is least sensitive? What are measures of central tendency used for? What are measures of dispersion used for?
Texas Company produces and sells 22,000 units of a single product. Costs associated with this level of production are as follows:
Quadratic equations can be solved by graphing, using the quadratic formula, completing the square, and factoring. What are the pros and cons of each of these methods?
You have to determine that your cutoff value at level a = 0.05 is 1.645 when testing whether the mean of a population is significantly different from 1.5. If you calculate a test statistic of 1.8 what is the proper conclusion?
Evaluate probabilities using the laws of probability, the standard normal distribution, t-distribution, or X2-distribution.
A person asks, "what do you think is the ideal number of children for a family to have?" The 497 females who responded had a median of 2, mean of 3.02, and a standard deviation of 1.81.
Election-day polls are taken from voting precincts selected because they are believed to be representative of all voters.
For each data set, compute and save g(m hat). Then do the following: Plot the histogram of B values of g(m hat)and sqrt(n)*[g(m hat)- g(m )].
Class where the mean is 85 and the standard deviation is 4.59, who did better relative to their class? Note both did better than the class mean. How do you answer this question?
Compute SS, variance, and standard deviation for following population of N = 7.Scores: 8, 1, 4, 3, 5, 3, and 4. The definitional formula works well with these scores. Use the definitional formula to compute SS.
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