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A community college administrators would like to know how many credit hours on average, each student takes per quarter. A random sample of 250 students yields a mean of 14.1 credit hours per quarter with a standard deviation of 2.3 credit hours per quarter. Estimate the mean to within 0.1 hours at 95% reliability and assume the sample standard deviation provides a good estimate for the population standard deviation. How large a sample do they need?
Correct explanation of divisibility and divisibility RULES - Correct work for applying divisibility rules to given NUMBERS
open the StatCrunch file Housing_Prices_Categorical_ Factors. The varia bles in the file are explained in the file description in StatCrunch. Look at the description of the variables in the file and the variables themselves and develop a "research q..
If the F test indicates significant differences at the 0.05 significance level, apply Tukey's HSD to see if there is a slugger who stands out with the lowest average. Is there a slugger with an average significantly higher than the rest? Is Bonds ..
The Mount Washington Observatory (MWO) in New Hampshire claims to have the world's worst weather. Below are some data on the weather extremes recorded.
The accomanying table is a one way, independent groups ANOVA summary table with part of material missing.assuming an equal number of subject are there in each group. What is the value of F crit, using alpha 0.05?
suppose a highlighter manufacturer wanted to find out whether a highlighter lasted longer than the claim of 14
predicting winning percentage for the nflthe national football league nfl records a variety of performance data for
an insurance company estimates 45 percent of its claims have errors. the insurance company wants to estimate with 95
You have just received an inheritance of $10,000 and you decide that you should invest the money rather than blow it on frivolous items.
Demographics and Population Statistics. According to National Geographic, 28% of Canadians are of British descent. Suppose 150 Canadians in Alberta.
Let market demand be given by Q( P) = 200 - P. Each firm's cost function is C(qi ) = 20qi , where i = 1, 2. Using the Cournot model, find each firm's output, profit, and price.
Design a nonequivalent control group pretest-posttest quasi-experiment to test this claim. Include a well-reasoned dependent measure as well.
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