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C784 FINAL EXAM REVIEW TEST ALL QUESTIONS WITH ACCURATE & VERIFIED ANSWERS A+ GRADED|FREQUENTLY ASKED QUESTIONS |2024 LATEST

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Choose the best description of the scatterplot below.Correct. The correct answer is c. This scatterplot shows a curved pattern. a) No correlation b) Strong negative linear correlation c) Non-linear correlation d) Strong positive linear correlation 8) Two categorical variables are best displayed in a ________.Correct. The correct answer is b. The best method to display two categorical variables is a two-way frequency table. a) side-by-side box plot b) two-way frequency table c) scatterplot d) pie chart 9) Patients with painful cluster headaches were treated with oxygen or a placebo. The patients rated their pain as "better" or "not better." Which type of graphical display would be the best choice for this data?Correct. The correct answer is a. The variables are occurrence of headaches, and type of treatment. Because both variables are categorical, a two-way table is the best choice to display the data. a) Two-way table b) Side-by-side box plot c) Scatterplot d) Qualitative graph 10) A two way table will help analyze patterns in the data when analyzing two quantitative variables. True or False?Correct. The correct answer is b. This statement is false; when analyzing two categorical variables, a two-way table is a good tool. For two quantitative variables, though, a different tool such as a scatterplot and/or a correlation coefficient should be used. a) True b) False 11) Side-by-side box plots are useful for which type of data?The correct answer is b. Side-by-side boxplots are useful when the explanatory variable is categorical and the response variable is quantitative. a) Both explanatory and response variables are categorical. b) Explanatory variable is categorical and response variable is quantitative. c) Both explanatory and response variables are quantitative. d) Explanatory variable is quantitative. and response variable is categorical

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C784 FINAL EXAM REVIEW TEST ALL
QUESTIONS WITH ACCURATE & VERIFIED
ANSWERS A+ GRADED|FREQUENTLY ASKED
QUESTIONS |2024 LATEST

 2)Adult diastolic blood pressures are normally distributed. The mean is 65.3 mm Hg and the
standard deviation is 11.3 mm Hg. What values would 95%95% of the data fall between?The
answer is c. Use the Empirical Rule to determine that 95%95% of the diastolic blood pressure
values will be within two standard deviations of the mean.

Therefore, the upper limit will be:

65.3+2(11.3)=65.3+22.6=87.965.3+2(11.3)=65.3+22.6=87.9

And the lower limit will be:

65.3−2(11.3)=65.3−22.6=42.765.3-2(11.3)=65.3-22.6=42.7

Therefore, 95%95% of the diastolic blood pressures will be between 42.742.7 mm Hg and 87.987.9
mm Hg.



a) 47.2 and 89.7



b) 42.2 and 86.9



c) 42.7 and 87.9



d) 41.6 and 86.8




3) Assuming that adult diastolic blood pressures are normally distributed, what is the approximate
percentage of adults who have diastolic blood pressures within 11 standard deviation of the mean, or
between 54.0mm Hg and 76.6 mm Hg?The answer is d. The range is the difference between the
smallest and greatest values (maximum and minimum) of a data set. The minimum value is 48; the
maximum is 84. 84 -48 = 36

,C784 FINAL EXAM REVIEW TEST ALL
QUESTIONS WITH ACCURATE & VERIFIED
ANSWERS A+ GRADED|FREQUENTLY ASKED
QUESTIONS |2024 LATEST
a) 50%



b) 68%



c) 95.4%



d) 99.7%




4) What is the range of the following data set?The answer is d. The range is the difference between
the smallest and greatest values (maximum and minimum) of a data set. The minimum value is 48; the
maximum is 84. 84 -48 = 36




a) 26




b) 28



c) 32



d) 36

, C784 FINAL EXAM REVIEW TEST ALL
QUESTIONS WITH ACCURATE & VERIFIED
ANSWERS A+ GRADED|FREQUENTLY ASKED
QUESTIONS |2024 LATEST

5) What is the mean of the following data set?The answer is a. To find the mean, the first step is to
add all of the values together. Then divide that sum (784) by the number of values in the data set
(12) . 78/412=65.3




a) 65.3




b) 69.2



c) 61.6



d) 64.4




6) What is second quartile (Q2Q2) of this data set?The answer is c. As there are an even number of
data points in this data set, the median is half-way between 125 and 125. Therefore, the second
quartile (Q2), also called the median, =125.



a) 123




b) 124



c) 125

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