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68 % of grocery stores sell Haagen-Dazs ice-cream. A random sample of 290 stores is selected. (a) What is the probability that the sample proportion of grocery stores selling Haagen-Dazs ice-cream, will be within 0.01 of the population proportion?
Use any method to decide whether to rejects or fail to reject the null hypothesis. Then interpret the decision in the context of the original claim.
With this important detail, are there any significant differences with LSD?
What can we say about the probability distribution of x? Is it approximately normal? What are the mean and standard deviation?
In an analysis of variance problem involving 3 treatments and 10 observations per treatment, SSE = 399.6. The MSE for this situation is:
This result prompts a test administrator to claim that standard deviation for eighth graders on examination is less than 29.At a = 0.10, is there sufficient evidence to support administrator's claim?
A random sample of n = 4 scores is obtained from a normal population with = 20 and = 4. What is the probability of obtaining a mean greater than M = 22 for this sample?
Compare the standard deviation for the heights of males and the standard deviation for the heights of females in the class.
What is the probability that all 3 would iPods from best buy? Or at least one would have iPod from best buy?
Compare his performance on the two tests in terms of percentile ranks. In which exam did he do better? Please show computations and discuss.
Revenue and cost functions for producing and selling quantity x for certain production facility are given below. Find out profit function P(x).
What is the relationship between descriptive statistics and Affirmative Action ? Can using probability in market trending decisions lead to a bad decision? Explain?
Do you think a sample of 25 is large enough to give them the margin of error they want? If not, how large a sample do you suggest they take?
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