CHAPTER 7 SECTION 2: RANDOM VARIABLES AND DISCRETE PROBAB ILITY DISTRIBUTIONS
TRUE/FALSE
68. The sum of the expected values always equals the expected value of the sums.
ANS: T
PTS: 1
NAT: Analytic; Probability Distributions
REF: SECTION 7.2
69. Bivariate
CHAPTER 13 SECTION 4: INFERENCE ABOUT COMPARING TWO
POPULATIONS
TRUE/FALSE
87. When comparing two population variances, we use the ratio
ANS: T
PTS: 1
NAT: Analytic; Hypothesis Testing
rather than the difference
REF: SECTION 13.4
88. We use a t-test to de
CHAPTER 14 SECTION 3-4: ANALYSIS OF VARIANCE
TRUE/FALSE
96. A randomized block experiment having five treatments and six blocks produced the following values:
SST = 252, SS(Total) = 1,545, SSE = 198. The value of SSB must be 1095.
ANS: T
PTS: 1
REF: SECTI
CHAPTER 14 SECTION 2: ANALYSIS OF VARIANCE
TRUE/FALSE
73. The Bonferroni adjustment to Fisher's Least Significant Difference (LSD) multiple comparison method
is made by dividing the specified experimentwise Type I error rate by the number of pairs of popu
CHAPTER 9 SECTION 3: SAMPLING DISTRIBUTIONS
TRUE/FALSE
136. The expected value of the sampling distribution of
population i (i = 1, 2).
ANS: T
PTS: 1
NAT: Analytic; Probability Distributions
REF: SECTION 9.3
137. The standard error of the difference betwe
CHAPTER 6 SECTION 1: PROBABILITY
TRUE/FALSE
1. The relative frequency approach to probability uses long term frequencies, often based on past data.
ANS: T
PTS: 1
NAT: Analytic; Probability Concepts
REF: SECTION 6.1
2. Predicting the outcome of a football
CHAPTER 4 SECTION 4: NUMERICAL DESCRIPTIVE TECHNIQUES
TRUE/FALSE
216. If the covariance of x and y is 26.16, and the standard deviation of x is 32.7, then the slope of the least
squares line is b1 =.80.
ANS: F
PTS: 1
NAT: Analytic; Descriptive Statistics
CHAPTER 9 SECTION 2: SAMPLING DISTRIBUTIONS
TRUE/FALSE
90. The mean of the sampling distribution of the sample proportion , when the sample size n = 100 and
the population proportion p = 0.92, is 92.0.
ANS: F
PTS: 1
NAT: Analytic; Probability Distribution
CHAPTER 16 SECTION 6: SIMPLE LINEAR REGRESSION AND CORREL ATION
TRUE/FALSE
251. Data that exhibit an autocorrelation effect violate the regression assumption of independence.
ANS: T
PTS: 1
NAT: Analytic; Regression Analysis
REF: SECTION 16.6
252. We stand
CHAPTER 7 SECTION 3: RANDOM VARIABLES AND DISCRETE PROBAB ILITY DISTRIBUTIONS
TRUE/FALSE
144. One of the ways in which financial analysts lower the risk that is associated with the stock market is
through diversification.
ANS: T
PTS: 1
NAT: Analytic; Prob
CHAPTER 8 SECTION 4: CONTINUOUS PROBABILITY DISTRIBUTIONS
TRUE/FALSE
170. Like that of the Student t distribution, the shape of the chi-squared distribution depends on its number
of degrees of freedom.
ANS: T
PTS: 1
NAT: Analytic; Probability Distribution
CHAPTER 5 SECTION 1: DATA COLLECTION AND SAMPLING
TRUE/FALSE
1. An observational study involves collecting data about persons or objects by recording information
about their selected characteristics of interest.
ANS: T
PTS: 1
NAT: Analytic; Sampling
REF:
CHAPTER 14 SECTION 1: ANALYSIS OF VARIANCE
TRUE/FALSE
1. The F-test used in one-way ANOVA is an extension of the t-test of 1 2.
ANS: T
PTS: 1
REF: SECTION 14.1
NAT: Analytic; Variation and Uncertainty
2. We use the analysis of variance (ANOVA) technique t
CHAPTER 6 SECTION 4-5: PROBABILITY
TRUE/FALSE
188. Bayes' Law is a formula for revising an initial subjective (prior ) probability value on the basis of new
results, thus obtaining a new (posterior ) probability value.
ANS: T
PTS: 1
NAT: Analytic; Probabi
CHAPTER 13 SECTION 3: INFERENCE ABOUT COMPARING TWO
POPULATIONS
TRUE/FALSE
57. A calculus professor wanted to test whether the grades on calculus test were the same for upper and
lower classmen. The professor took a random sample of size 12 from each grou
CHAPTER 4 SECTION 1: NUMERICAL DESCRIPTIVE TECHNIQUES
TRUE/FALSE
1. The mean is affected by extreme values but the median is not.
ANS: T
PTS: 1
NAT: Analytic; Descriptive Statistics
REF: SECTION 4.1
2. The mean is a measure of variability.
ANS: F
PTS: 1
N
CHAPTER 17 SECTION 1-2: MULTIPLE REGRESSION
TRUE/FALSE
1. In multiple regression analysis, the adjusted coefficient of determination is adjusted for the number of
independent variables and the sample size.
ANS: T
PTS: 1
NAT: Analytic; Regression Analysis
CHAPTER 8 SECTION 2: CONTINUOUS PROBABILITY DISTRIBUTIONS
TRUE/FALSE
55. A national standardized testing company can tell you your relative standing on an exam without divul ging the mean or the standard deviation of the exam scores.
ANS: T
PTS: 1
NAT: An
CHAPTER 16 SECTION 1-2: SIMPLE LINEAR REGRESSION AND
CORRELATION
TRUE/FALSE
1. An inverse relationship between an independent variable x and a dependent variably y means that as x
increases, y decreases, and vice versa.
ANS: T
PTS: 1
NAT: Analytic; Regres
CHAPTER 12 SECTION 3: INFERENCE ABOUT A POPULATION
TRUE/FALSE
80. In determining the sample size needed to estimate the population proportion p, we let the sample
proportion = 1 if we have no knowledge of even the approximate values of .
ANS: F
PTS: 1
NAT
CHAPTER 13 SECTION 1-2: INFERENCE ABOUT COMPARING TWO
POPULATIONS
TRUE/FALSE
1. Independent samples are those for which the selection process for one is not related to the selection
process for the other.
ANS: T
PTS: 1
NAT: Analytic; Hypothesis Testing
RE
CHAPTER 2 SECTION 3: GRAPHICAL DESCRIPTIVE TECHNIQUES I
TRUE/FALSE
65. A cross-classification table summarizes data from two nominal variables.
ANS: T
PTS: 1
NAT: Analytic; Descriptive Statistics
REF: SECTION 2.3
66. To describe the relationship between t
CHAPTER 16 SECTION 3-4: SIMPLE LINEAR REGRESSION AND
CORRELATION
TRUE/FALSE
88. When the actual values y of a dependent variable and the corresponding predicted values
same, the standard error of the estimate will be 1.0.
ANS: F
PTS: 1
NAT: Analytic; Regr
CHAPTER 9 SECTION 1: SAMPLING DISTRIBUTIONS
TRUE/FALSE
1. The Central Limit Theorem permits us to draw conclusions about a population based on a sample
alone, without having any knowledge about the distribution of that population. And this works no mat te
CHAPTER 13 SECTION 5: INFERENCE ABOUT COMPARING TWO
POPULATIONS
TRUE/FALSE
129. The pooled proportion estimate is used when the null hypothesis states that the two population
proportions differ by some non-zero number.
ANS: F
PTS: 1
NAT: Analytic; Hypothe
CHAPTER 8 SECTION 1: CONTINUOUS PROBABILITY DISTRIBUTIONS
TRUE/FALSE
1. Since there is an infinite number of values a continuous random variable can assume, the probability of
each individual value is virtually 0.
ANS: T
PTS: 1
NAT: Analytic; Probability
CHAPTER 2 SECTION 2: GRAPHICAL DESCRIPTIVE TECHNIQUES I
TRUE/FALSE
35. A bar chart is used to represent interval data.
ANS: F
PTS: 1
NAT: Analytic; Descriptive Statistics
REF: SECTION 2.2
36. One of the advantages of a pie chart is that it clearly shows t
CHAPTER 12 SECTION 1: INFERENCE ABOUT A POPULATION
TRUE/FALSE
1. In order to determine the p-value associated with hypothesis testing about the population mean , it is
necessary to know the value of the test statistic.
ANS: T
PTS: 1
NAT: Analytic; Hypothe
CHAPTER 5 SECTION 2-4: DATA COLLECTION AND SAMPLING
TRUE/FALSE
36. A person receives a mail survey and shreds it without opening it. This causes nonresponse error.
ANS: T
PTS: 1
NAT: Analytic; Sampling
REF: SECTION 5.2-5.4
37. Self-selected samples have n