Question 27 The birth weight of newborns, measured in grams, is an example of Answer categorical data either categorical or quantitative data neither categorical nor quantitative data quantitative data Question 28 A control chart that is used to monitor the range of the measurements in a sample is Answer a p chart an x-bar chart an R chart an np chart Question 29 The empirical rule states that, for data having a bell-shaped distribution, the percentage of data values being within one standard deviation of the mean is approximately Answer 33 50 68 95 Question 30 The relative frequency of a class is computed by Answer dividing the midpoint of the class by the sample size. dividing the frequency of the class by the midpoint. dividing the sample size by the frequency of the class. dividing the frequency of the class by the sample size. Question 31 When using Excel to calculate a p-value for an upper-tail hypothesis test, the following must be used Answer RAND 1 – NORMSDIST NORMSDIST Not enough information is given to answer this question. Question 32 Excel’s __________ function can be used to compute the mean. Answer MAX AVERAGE MEDIAN MODE Question 33 In regression analysis, the variable that is being predicted is the Answer dependent variable independent variable intervening variable None of these answers is correct. Question 34 For a standard normal distribution, a negative value of z indicates Answer a mistake has been made in computations, because z is always positive the area corresponding to the z is negative the z is to the left of the mean the z is to the right of the mean Question 35 Exhibit 9-3 n = 49 H0: m = 50 = 54.8 Ha: m ¹ 50 s = 28 Refer to Exhibit 9-3. The test statistic equals Answer 0.1714 0.3849 -1.2 1.2 Question 36 Exhibit 6-5 The weight of items produced by a machine is normally distributed with a mean of 8 ounces and a standard deviation of 2 ounces. Refer to Exhibit 6-5. What is the probability that a randomly selected item will weigh more than 10 ounces?
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