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You want to determine if your widgets from machine 1 are the same as machine 2. Machine 1 has a sample mean of 50 and a population standard deviation of 5 and a sample size of 25. Machine 2 has a sample mean of 52 and a population standard deviation of 6 with a sample size of 12. With an alpha of .01, Which of the following statements are true?
a. We can use 2.58 and -2.58 (or 2.57 and -2.57) as our critical values
b. We will use a z test.
c. we use 1.28 and -1.28 (or 1.27 and -1.27) as our critical values
d. A and B are correct
e. None of the above are correct
Draw a scatterplot indicating a strong negative relationship between the variables pf income and mental illness. Be sure to label the axes correctly.
Identify the level of measurement (nominal, ordinal, interval, ratio) for the number of shares held by stockholders.
Which measures of central tendency will always have but one (1) value for a set data?
Health and Nutrition Examination Survey, suppose that weights of men now are normally distributed with mean of m =172 pounds and standard deviation of s = 29 pounds.
A psychologist is examining the influence of an older sibling in the development of social skills. A sample of 24 three year old children is obtained.
A recent study of the Greater Los Angeles Taxi Driver Association demonstrated that the average or media tariff that they charge from Hermosa Beach to the International Airport of Los Angeles is $18.00
Describe what do you mean by conditional probability. Give clinical example to support the explanation.
What is wrong with gauging stockholder views about employee benefits by mailing a questionnaire that IBM stockholders could complete and mail back?
If we have 2 groups with 2 characteristics each, what would our critical value be with an alpha of .025?
Given the following number of hours between breakdowns for 4 machines, are the machines significantly different? If so, how are they different? Which machine is the best? Which machine is the worst?
A multiple-choice examination consists of 90 questions, each having possible choices a, b, c, d, and e. Approximate the probability that a student will get at least 21 answers correct if she randomly guesses at each answer.
Sketch a graph and shade the area of interest. SCores on a standardized exam are normally distributed with u = 60 and o = 5.
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