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The following data show samples of three chain stores in three different locations in one town and the amount of dollars spent per customer per visit. Management wishes to test whether each shopper is spending an equal amount of money at each store.
Store A Store B Store C29 4 220 45 228 34 1730 12 640 9 3925 43
Perform a one-way analysis of variance on these data, assuming = 0.05:· State the null and alternate hypotheses· Calculate the sums of squares SS(total), SS(factor), and SS(error)· Calculate the degrees of freedom df(total), df(factor), and df(error)· Calculate the mean square for factor, and the mean square for error· Calculate the F-statistic· Determine the critical value(s)· State your decision: Should the null hypothesis be rejected?
Survey was mailed to a total of 400 students; 100 were randomly selected from each of the freshman, sophomore, junior and senior classes last semester. What sampling method was used?
Test the overall significance of the regression model at α = .05 level. Please use the six-step hypothesis-testing framework we employed in class, and write out the last three steps in this table:
The following output is the result of running a linear regression on WEIGHT (y) = average weight in pounds for American females. Based on this regression model output, what will be the weight of a Russian Female who is 71 inches tall?
The same city are delivered within two days. Six parcels are randomly sent to different locations. What is the probability that all six arrive within two days?
The true breaking strength of our trash bags when using a 95% confidence interval. What is the minimum number of bags we should sample?
The hypothesis that the samples came from identical populations cannot be rejected, the T value is 16.5 greater that the lower limit.
Let X be a random variable with probability density distribution given by. Find the probability density function of Y=10X - 4.
The proportion of adults in the sample, as her estimate of p, the proportion of adults in the pond population. Find using the normal approximation with the continuity correction.
Solve using the square root property: Radicands must be enclosed within
Assuming the population variances from both offices are equal, is there evidence of a difference in the mean waiting time between the two offices? Use α = 0.05
Using an investment game, the study demonstrated that people who inhaled oxytocin were more likely to give their money to a trustee compared to people who inhaled an inactive placebo. For this experimental study, identify the independent variable a..
Which 56 have this coverage. Does this support the claim that the proportion is less than 15%? Test the claim at the 5% level by the following steps.
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