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For a particular sample of 53 scores on a psychology exam, the following results were obtained.First quartile = 44 Third quartile = 68 Standard deviation = 9 Range = 55Mean = 51 Median = 54 Mode = 71 Midrange = 64
Answer each of the following:
I. What score was earned by more students than any other score? Why?II. What was the highest score earned on the exam?III. What was the lowest score earned on the exam?IV. According to Chebyshev's Theorem, how many students scored between 57 and 93?V. Assume that the distribution is normal. Based on the Empirical Rule, how many students scored between 57 and 93?
Researchers at Pharm-X, a pharmaceutical company, are testing and comparing the effects of Drug A and Drug B on participants' allergies. The researchers are using a double-blind procedure to conduct their test.
A biologist has found that the average weight of 12 randomly selected adult mud turtles is 8.7 lb. with standard deviation 3.6 lbs. Construct a 99% confidence interval for the population mean weight of adult mud turtles.
With your start time being random and uniformly distributed in this interval. What is the PDF of the time that you have to wait for the first train to arrive?
A random check of 81 records of inmates from all federal prisons found the confidence interval for mean prison terms per prisoner to be 2.113 years to 2.287 years.
For each of the following three scenarios, state which hypothesis test you would use from among the four introduced so far: the z test, the single-sample t test, the paired-samples t test, and the independent-samples t test.
Micron Electronics makes both desktop and laptop personal computers that they sell directly to customers by phone or over the Internet.
It is estimated that 2% of the athletes competing in a large tournament are users of an illegal drug to enhance performance. The test for this drug is 95% accurate. What is the probability that an athlete who tests positive is actually a user?
Suppose the population standard deviation is 350 kilowatt hours. Determine the standard error of the mean. With a .95 probability, determine the margin of error.
What is the range of correlation coefficient? Give a real world example of positive and negative correlation. Do you want stocks which are highly correlated with each other or less correlated? Why?
Determine which crew should be sent to each city to minimize the total distance traveled. How many miles will be traveled if these assignments are made?
It is the gallons of water processed at a plant, and the amount of lead removed from the water. A. Make a scatterplot to determine what kind of relationship there seems to be between the two variables. Use the percent of lead removed as the respon..
The data in the scatterplot below are an individual's weight and the time it takes (in seconds) on a treadmill to raise his or her pulse rate to 140 beats per minute. The o's correspond to females and the +'s to males.
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