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The effect of a different point. Examine the data in Exercise 4.41 and add a ninth student who has low scores on the second test and the final exam and fits the overall pattern of the other scores in the data set. Calculate the correlation and compare it with the correlation that you calculated in Exercise 4.41. Write a short summary of your findings.
Exercise 4.41
Second test and final exam. In Exercise 4.25 you looked at the relationship between the score on the second test and the score on the final exam in an elementary statistics course. Here are the data:
(a) Find the correlation between these two variables.
(b) Do you think that the correlation between the first test and the final exam should be higher than, approximately equal to, or lower than the correlation between the second test and the final exam? Give a reason for your answer.
If one of the 100 employees is randomly selected, find the probability of getting someone who carpools, someone who cycles to work, or someone who works part time.
Alexa got 144 on her test which has a mean of 128 and a standard deviation of 34. What is her z-score?How do you calculate the z score for the raw score of 10 based on the following distribution: 8, 9, 15, 30, 7, 8 ?
Do our athletes graduate? The National Collegiate Athletic Association (NCAA) requires colleges to report the graduation rates of their athletes.
fx k1-1x2 1 ? x lt 2 is the distribution function for a continuous random variable x. solve for the value of k and
When a person defaults on a loan, which type of error did the bank make?- Which kind of error is it when the bank misses an opportunity to make a loan to someone who would have repaid it?
The agency also feels that the interaction effects A × C, A × B, and B × C are important. Show an experimental design that can estimate these effects using a minimal number of experiments.
Refer to Exercise 10.14 (p. 578). The researchers concluded that "in order to break a water-oil mixture with ' the lowest possible voltage, the volume fraction of the disperse phase x, should be high, while the salinity x2 and the amount of su..
According to Padgett Business Services, 20% of all smallbusiness owners say the most important advice for starting a business is to prepare for long hours.
For this set of numbers: 40 40 45 43 48 45 40 40 40 40 40 40 40 48 43 40 43 40 40 45 what is the mean, standard deviation.
Three cards are dealt from a standard, well-shuffled, deck. The first two cards are flipped over, revealing the Ace of Spades as the first card.
The government of the United States of America is the federal government of the republic of fifty states that constitute the United States, as well as one capital district, and several other territories. Discuss the history of federal government?
Assume that cans of Coke are filled so that the actual amounts have a mean of 12.00 oz and a stand. dev. of 0.11 oz. Find the P that a sample of 36 cans will have a mean amount of at least 12.19 oz.
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