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Question: Sloppy writing about correlation. Each of the following statements contains a blunder. Explain in each case what is wrong.
(a) "There is a high correlation between a college student's major and his or her starting salary after graduation."
(b) "We found a high correlation (r = 1.09) between the scores of students on the first and second exams in our statistics course."
(c) "The correlation between number of years of education and income was found to be r = 0.53 years."
let the interval -rr be the base of a semicircle. if a point is selected at random from this interval assign a
What is the probability that XYZ's value will decrease during a year? - What is the probability that the return on XYZ during a year will be at least 20%?
Suppose that a random sample of 40 toddlers finds that 34 know what color Barney is. What is the 90% confidence interval for the percentage of toddlers who know what color Barney is?
You find that a random sample of five microwave ovens has a mean repair cost of $75 and a standard deviation of $12.50. At α = 0.01, do you have enough evidence to support the repairer's claim?
The analysis of covariance (ANCOVA) is generally useful for _______________
We will say the standard error in this case is 2. If the z-score is 1.96, calculate a 95% confidence interval based on this new information.
For each variable in the data set provided, classify the variable as Nominal, Ordinal, Interval or Ratio. Explain why you made the decision for each.
when a certain manufacturing process is correctly adjusted the length of a machine part produced is a random variable
Find the mean time that the toll collector will require to serve cars that arrive in a one-minute interval.- Find the PDF of the time that the toll collector will require to serve cars that arrive in a one-minute interval.
Multiply by 50 to get the middle 95% of the distribution of the gamblers winnings on nights when he places 50 bets. (d) What is the probability that the gambler will lose money if he makes 50 bets?
a die is loaded so that the number 6 comes up three times as often as any other number. what is the probability of
Beta and required rate of return stock has required return of 11%; risk-free rate is 7%t; and market risk premium is 4 %. Determine the stock's beta?
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