1) A sample of the final exam scores in a precalculus class is as follows: 98 74 90 97 86 43 58 67 69 68 97 80 72 50 83 69 63 69 74 84 a) Use Table III in Appendix A to construct a normal probability plot of the given data. b) Use part (a) to identify any outliers. c) Use part (a) to assess the normality of the variable under consideration.
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1) A sample of the final exam scores in a precalculus class is as follows:
98 74 90 97 86
43 58 67 69 68
97 80 72 50 83
69 63 69 74 84
- a) Use Table III in Appendix A to construct a normal
probability plot of the given data. - b) Use part (a) to identify any outliers.
- c) Use part (a) to assess the normality of the variable under consideration.
2) A possible starting team for the 2013-14 New York Knicks is shown in the following table.
Player Position Height (inches)
Raymond Felton(R) Guard 73
J.R.Smith(J) Guard 78
Iman Shumpert(I) Forward 77
Carmelo Anthony(C) Forward 80
Andrea Bargnani(A) Center 84
- a) Calculate the population mean height, , of the five players.
- b) For samples of size 2, construct a table similar to Table 7.2 on page 299. Use the letter in parentheses after each player’s name to represent each player.
- c) Draw a dotplot for the sampling distribution of the sample mean for samples of size 2.
- d) For a random sample of size 2, what is the chance that the sample mean will equal the population mean?
- e) For a random sample of size 2, obtain the probability that the sampling error made in estimating the population mean by the sample mean will be 1 inch or less; that is, determine the probability that will be within 1 inch of . Interpret your results in terms of percentages.
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