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The total evaporation amount of a growing season in Minneapolis is approximately normally distributed with a standard deviaion of 4.00 inches. Given that the most recent 16 growing seasons have an average evaporation amount of 34.50 inches, find a 95% confidence interval for the population mean of the growing season evaporation amount in Minneapolis.
Fifty raffle tickets are numbered 1 throughout 50, and one of them is drawn at random. What is the probability that the number is a multiple of 5 or 8? Consider the following "solution": Since 10 tickets bear numbers that are multiples of 5 and 6 ..
Compare your best difference to the result from an ordinary two-sample t-test between these groups. Comment the difference.
a survey of 50 companiesin january 08 fifty customers of a lumber manufacturer were surveyed regarding their
Using the appropriate statistical procedure on the SPSS, test the between group means for a significant difference.
Based on observations of a few third graders in the lunch line, they assess P(P) as 0.75. More convincing evidence that P(P) is .75 would be?
8.175 How much power does this study have to detect a mean difference of 5 units in the symptom scale if a two sided test is used with α = .05?
A rental agent claims that the mean monthly rent,u, for apartments on the east side of town is less than$725 . A random sample of 13 monthly rents for apartments on the east side has a mean of$714
A common error is neglecting to get ranked data for some statistical processes. Why do we have to have ranked data? Give an example of where you would need ranked data.
A jar contains marbles of different colors: 4 white, 6 black, 6 red, and 4 blue. On two random drawings, without replacement, find the probability that the first is black and the second is white.
The critical F value with 6 numerator and 60 denominator degrees of freedom at α = .05 is:
One group was enquired, questions what they saw. One group was enquired, "About how fast were cars going when they smashed into each other?"
Estimating the combined mean values for the given data - find the mean for the combined sample
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