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STRAIGHTERLINE BUSINESS STATS NEWEST ACTUAL EXAM 2025 QUESTIONS AND CORRECT ANSWERS | A+GRADE
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STRAIGHTERLINE BUSINESS STATS NEWEST ACTUAL EXAM 2025 QUESTIONS AND CORRECT ANSWERS | A+GRADE
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STRAIGHTERLINE BUSINESS STATSNEWEST ACTUAL EXAM 2025
QUESTIONS AND CORRECT ANSWERS |
A+GRADE 2024-2025
The monthly amounts spent for food by families of four
receiving food stamps approximates a symmetrical,
normal distribution. The sample mean is $150 and the
standard deviation is $20. Using the Empirical Rule, about
95% of the monthly food expenditures are between what
two amounts? Correct Answer $110 and $190
What is the relationship between the variance and the
standard deviation? Correct Answer Variance is the
square of the standard deviation.
Which measure of dispersion disregards the algebraic
signs (plus and minus) of each difference between X and
the mean? Correct Answer mean deviation
Which of the following measures of dispersion are based
on deviations from the mean?
a. Variance
b. Standard deviation
c. Mean deviation
d. All apply Correct Answer Correct - All Apply
,Based on the Empirical Rule, what percent of the
observations will lie between plus or minus two standard
deviations from the mean? Correct Answer 95%
For a sample of similar sized all-electric homes, the March
electric bills were (to the nearest dollar): $212, $191,
$176, $129, $106, $92, $108, $109, $103, $121, $175,
and $194. What is the range? Correct Answer $120
In a distribution, the second quartile corresponds with the
__________. Correct Answer Median
A dot plot is best applied when _____________________.
Correct Answer A single variable is summarized
What statistics are needed to draw a box plot? Correct
Answer The minimum, maximum, median, first and third
quartiles.
A box plot shows ___________. Correct Answer The
relative symmetry of a distribution for a set of data
Quartiles divide a distribution into ___________. Correct
Answer 4 equal parts
The test scores for a class of 147 students are computed.
What is the location of the test score associated with the
third quartile? Correct Answer 111
, What is the value of the Pearson coefficient of skewness
for a distribution with a mean of 17, a median of 12, and a
standard deviation of 6? Correct Answer +2.5
If the coefficient of skewness is equal to zero, the shape of
the distribution is __________. Correct Answer symmetric
The range of the coefficient of skewness is
____________. Correct Answer both positive and
negative values
What is the possible range of values for Pearson's
coefficient of skewness? Correct Answer -3 and +3
A sample of experienced typists revealed that their mean
typing speed is 87 words per minute and the median
typing speed is 73 words per minute. The standard
deviation of typing speed is 16.9 words per minute. What
is the Pearson coefficient of skewness? Correct Answer
+2.5
In a contingency table, we describe the relationship
between ________. Correct Answer Two variables
measured at the ordinal or nominal level
The general process of gathering, organizing,
summarizing, analyzing, and interpreting data is called
____________. Correct Answer Statistics
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