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Study Resources (Statistics)

  124) True or False: Apple Computer, Inc. collected information on the age of its customers. Theyoungest customer was 12 and the oldest was 72. To study the distribution of the age among itscustomers, it can use a percentage polygon.   125) True or False: Apple Computer, Inc. collected information on the age.
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  TABLE 14-7 A supplier of silicone sheets for producers of computer chips wants to evaluate her manufacturing process. She takes samples of size 5 from each day's output and counts the number of blemishes on each silicone sheet. The results from 20 days of such evaluations are presented below.     She also decides.
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  TABLE 13-13 An econometrician is interested in evaluating the relationship of demand for building materials to mortgage rates in Los Angeles and San Francisco. He believes that the appropriate model is   Y = 10 + 5X1 + 8X2   whereX1 = mortgage rate in % X2 = 1 if SF, 0 if LA Y = demand.
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  1) The control chart A) focuses on the time dimension of a system. B) captures the natural variability in the system. C) can be used for categorical, discrete, or continuous variables. D) all of the above 2) Variation signaled by individual fluctuations or patterns in the data is called A) special or assignable causes. B) common or.
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  TABLE 13-15 The superintendent of a school district wanted to predict the percentage of students passing a sixth-grade proficiency test. She obtained the data on percentage of students passing the proficiency test (% Passing), daily mean of the percentage of students attending class (% Attendance), mean teacher salary in dollars (Salaries),.
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  239) Referring to Table 13-16, which of the following assumptions is most likely violated based on the residual plot of the residuals versus predicted Y? A) independence of errors B) normality of errors C) equal variance D) none 240) Referring to Table 13-16, which of the following assumptions is most likely violated based on the.
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  TABLE 13-5 A microeconomist wants to determine how corporate sales are influenced by capital and wage spending by companies. She proceeds to randomly select 26 large corporations and record information in millions of dollars. The Microsoft® Excel output below shows results of this multiple regression.   49) Referring to Table 13-5, what fraction.
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  89) Referring to Table 2-11, construct a frequency distribution for the defects data, using "0 but less than 5" as the first class.   90) Referring to Table 2-11, construct a relative frequency or percentage distribution for the defects data, using "0 but less than 5" as the first class.   91) Referring to.
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  199) Referring to Table 13-15, what is the p-value of the test statistic to determine whether there is a significant relationship between percentage of students passing the proficiency test and the entire set of explanatory variables? 200) True or False: Referring to Table 13-15, the null hypothesis should be rejected at.
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  TABLE 13-4 A real estate builder wishes to determine how house size (House) is influenced by family income (Income), family size (Size), and education of the head of household (School). House size is measured in hundreds of square feet, income is measured in thousands of dollars, and education is in years..
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  104) True or False: The sum of cumulative frequencies in a distribution always equals 1.   105) True or False: In graphing two categorical data, the side-by-side bar chart is best suited when comparing joint responses.   106) True or False: When constructing a frequency distribution, classes should be selected so that they are.
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  59) Referring to Table 13-5, what are the predicted sales (in millions of dollars) for a company spending $100 million on capital and $100 million on wages? A) 15,800.00 B) 16,520.07 C) 17,277.49 D) 20,455.98 60) Referring to Table 13-5, what are the predicted sales (in millions of dollars) for a company spending $500 million.
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  129) Referring to Table 13-10, the standard error of the estimate is _________. 130) Referring to Table 13-10, the estimated mean change in insurance premiums for every two additional tickets received is ________. 131) Referring to Table 13-10, the 99% confidence interval for the change in mean insurance premiums of a person.
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  134) True or False: To evaluate two categorical variables at the same time, a ________ could bedeveloped.   135) True or False: Relationships in a contingency table can be examined more fully if the frequenciesare converted into ________. TABLE 2-12 The table below contains the opinions of a sample of 200 people broken down.
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  144) Referring to Table 2-12, ________ percent of the 200 were females who were against the plan.   145) Referring to Table 2-12, ________ percent of the 200 were males who were neutral.   146) Referring to Table 2-12, ________ percent of the 200 were females who were either neutral or against the plan.   147).
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  21) Referring to Table 14-3, suppose the analyst constructs an R chart to see if the variability in production times is in control. The R chart is characterized by which of the following? A) increasing trend B) decreasing trend C) in control D) points outside the control limits 22) Referring to Table 14-3, suppose the.
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  179) True or False: Referring to Table 13-15, the null hypothesis should be rejected at a 5% level of significance when testing whether instructional spending per pupil has any effect on percentage of students passing the proficiency test, taking into account the effect of all the other independent variables. 180) True.
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  TABLE 14-9 The manufacturer of canned food constructed control charts and analyzed several quality characteristics. One characteristic of interest is the weight of the filled cans. The lower specification limit for weight is 2.95 pounds. The table below provides the range and mean of the weights of five cans tested every.
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  161) Referring to Table 2-13, construct a frequency distribution for the detergent data, using "9.0 but less than 10.0 gallons" as the first class.   162) Referring to Table 2-13, construct a relative frequency or percentage distribution for the detergent data, using "9.0 but less than 10.0" as the first class.   163) Referring.
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  21) Referring to Table 13-3, what is the estimated mean consumption level for an economy with GDP equal to $2 billion and an aggregate price index of 90? A) $1.39 billion B) $2.89 billion C) $4.75 billion D) $9.45 billion 22) Referring to Table 13-3, one economy in the sample had an aggregate consumption level.
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  166) Referring to Table 2-13, construct a percentage polygon for the detergent data if the corresponding frequency distribution uses "9.0 but less than 10.0" as the first class.   TABLE 2-14 The table below contains the number of people who own a portable DVD player in a sample of 600 broken down by.
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    1) Jared was working on a project to look at global warming and accessed an Internet site where he captured average global surface temperatures from 1866. Which of the four methods of data collection was he using? A) published sources B) experimentation C) surveying D) observation   2) The British Airways Internet site provides a questionnaire.
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  114) True or False: The stem-and-leaf display is often superior to the frequency distribution in that itmaintains the original values for further analysis.   115) True or False: The relative frequency is the frequency in each class divided by the total number ofobservations.   116) True or False: Ogives are plotted at the.
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