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If W denotes the total number of spaces one moves under these special conditions, find the mean and standard deviation of W.
a) Suppose X and Y are random variables with means 6 and 1, respectively. Let W = X - 2Y. Find the mean of W.
b) Suppose X and Y are independent, with standard deviations 3 and 1, respectively. Find the standard deviation of W.
c) Suppose Q = (X-6)/3. Find the mean and standard deviation of Q.
Create the corresponding decision tree and make recommendations.
Does this sample indicate a smaller average? Use α = 0.05 and assume a normally distributed population.
A researcher uses hypothesis test to estimate H0 µ= 80. Which combination of factors is most probable to result in rejecting null hypothesis?
Perform a chi-square test on the following data:
Create a 95% confidence interval for mean cost of repairs. Interpret this interval.
What is the probability that the team wins tonight and that there will be a large crowd at tomorrow's game?
Show that someone will think that the claim has more than a fifty percent chance of being true if p > q / (1 + q). Explain.
Suppose that a researcher does a study to see how level of anxiety (A 1 = low, A 2 = medium, A 3 = high) is used to predict exam performance (Y).
Analysis of data sets assignment
Convert each of the following z intervals to x intervals.
By using 0.05 level of significance, is there any evidence of difference in mean life of bulbs produced by two kinds of machines?Calculate p-value and interpret its meaning.
Compute z values for each and comment on your findings.
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