CHAPTER 4 SECTION 7-8: NUMERICAL DESCRIPTIVE TECHNIQUES
TRUE/FALSE
260. Statisticians typically apply graphical techniques as a first step in a data analysis because we first need
to know the shape of
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
RE
CHAPTER 7 SECTION 4: RANDOM VARIABLES AND DISCRETE PROBAB ILITY DISTRIBUTIONS
TRUE/FALSE
175. The binomial random variable is the number of successes that occur in a fixed period of time.
ANS: F
PTS:
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.
CHAPTER 3 SECTION 4: GRAPHICAL DESCRIPTIVE TECHNIQUES II
TRUE/FALSE
141. Graphical techniques should not be used to present data if accurate tabular forms for the same data are
available.
ANS: F
PTS:
CHAPTER 3 SECTION 2: GRAPHICAL DESCRIPTIVE TECHNIQUES II
TRUE/FALSE
84. A line chart is created by plotting the values of the variable on the vertical axis and the time periods on
the horizontal axis.
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 )
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; P
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
thr
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
CHAPTER 4 SECTION 2: NUMERICAL DESCRIPTIVE TECHNIQUES
TRUE/FALSE
75. The value of the standard deviation may be either positive or negative, while the value of the variance
will always be positive.
AN
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
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: SECT
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: Analyt
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 p
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
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
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 experime
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
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 =.8
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
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 o
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 stand
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 knowledg
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:
CHAPTER 3 SECTION 3: GRAPHICAL DESCRIPTIVE TECHNIQUES II
TRUE/FALSE
108. The graphical technique used to describe the relationship between two interval variables is the scatter
diagram.
ANS: T
PTS: 1
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 decreas
CHAPTER 4 SECTION 3: NUMERICAL DESCRIPTIVE TECHNIQUES
TRUE/FALSE
142. The distance between the 25th percentile and the median is always the same as the distance between the
median and the 75th percent
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 t