1|Page
Straighterline Statistics Actual Exam (Latest 2026
Update) Questions and Verified Answers With
Rationales | 100% Correct | Grade A+||Verified Exam!!!
A sample of the paramedical fees charged by clinics
revealed these amounts: $55, $49, $50, $45, $52, and
$55. What is the median charge? - Answer-51.00
For a data set with an odd number of observations that
have been sorted from smallest to largest values, where is
the median located? - Answer-(n + 1)/2
Assume a student received the following grades for the
semester: History, B; Statistics, A; Spanish, C; and
English, C. History and English are 5 credit-hour courses,
Statistics a 4 credit-hour course, and Spanish a 3 credit-
hour course. If 4 grade points are assigned for an A, 3 for
a B, and 2 for a C, what is the weighted mean grade for
the semester? - Answer-2.76
A disadvantage of using an arithmetic mean to summarize
a set of data is that __________. - Answer-It can be
biased by one or two extremely small or large values
,2|Page
A survey item asked students to indicate their class in
college: freshman, sophomore, junior, or senior. Which
measure(s) of central location would be appropriate for the
data generated by that questionnaire item? - Answer-
Mode and median
The times (in minutes) that several underwriters took to
review applications for similar insurance coverage are 50,
230, 52, and 57. What is the median length of time
required to review an application? - Answer-54.5
For the most recent seven years, the U.S. Department of
Education reported the following number of bachelor's
degrees awarded in computer science: 4,033; 5,652;
6,407; 7,201; 8,719; 11,154; 15,121. What is the annual
arithmetic mean number of degrees awarded? - Answer-
About 8,327
Which of the following measures of dispersion are based
on deviations from the mean? - Answer-All apply
From the easiest to the hardest "ease of interpretation,"
rank the measures of dispersion. - Answer-Range, mean
deviation, variance
,3|Page
The weights of a sample of crates ready for shipment to
Moscow, Russia are (in kilograms): 103, 97, 101, 106, and
103. What is the mean deviation? - Answer-2.4 kg
A sample of assistant professors on the business faculty at
state-supported institutions in Ohio revealed the mean
income to be $72,000 for nine months, with a standard
deviation of $3,000. Using Chebyshev's Theorem, what
proportion of the faculty earns more than $66,000, but less
than $78,000? - Answer-At least 75%
Based on the Empirical Rule, what percent of the
observations will lie between plus or minus two standard
deviations from the mean? - Answer-95%
What is the relationship between the variance and the
standard deviation? - Answer-Variance is the square of the
standard deviation.
What statistics are needed to draw a box plot? - Answer-
The minimum, maximum, median, first and third quartiles
, 4|Page
A box plot shows ___________. - Answer-The relative
symmetry of a distribution for a set of data
A dot plot can be used to show _________________. -
Answer-The distribution for a quantitative variable
If a student places in the 99th percentile on an exam, she
performed better than 99% of all students who completed
the exam. Her performance is similar to a statement based
on a __________. - Answer-Cumulative frequency
distribution
The main purpose of descriptive statistics is to - Answer-
Summarize data in a useful and informative manner
Which word is NOT part of the definition of descriptive
statistics? - Answer-Predicting
A marketing class of 50 students evaluated the instructor
using the following scale: superior, good, average, poor,
and inferior. The descriptive summary showed the
following survey results: 2% superior, 8% good, 45%
average, 45% poor, and 0% inferior. - Answer-c. Most
students rated the instructor as poor or average.
Straighterline Statistics Actual Exam (Latest 2026
Update) Questions and Verified Answers With
Rationales | 100% Correct | Grade A+||Verified Exam!!!
A sample of the paramedical fees charged by clinics
revealed these amounts: $55, $49, $50, $45, $52, and
$55. What is the median charge? - Answer-51.00
For a data set with an odd number of observations that
have been sorted from smallest to largest values, where is
the median located? - Answer-(n + 1)/2
Assume a student received the following grades for the
semester: History, B; Statistics, A; Spanish, C; and
English, C. History and English are 5 credit-hour courses,
Statistics a 4 credit-hour course, and Spanish a 3 credit-
hour course. If 4 grade points are assigned for an A, 3 for
a B, and 2 for a C, what is the weighted mean grade for
the semester? - Answer-2.76
A disadvantage of using an arithmetic mean to summarize
a set of data is that __________. - Answer-It can be
biased by one or two extremely small or large values
,2|Page
A survey item asked students to indicate their class in
college: freshman, sophomore, junior, or senior. Which
measure(s) of central location would be appropriate for the
data generated by that questionnaire item? - Answer-
Mode and median
The times (in minutes) that several underwriters took to
review applications for similar insurance coverage are 50,
230, 52, and 57. What is the median length of time
required to review an application? - Answer-54.5
For the most recent seven years, the U.S. Department of
Education reported the following number of bachelor's
degrees awarded in computer science: 4,033; 5,652;
6,407; 7,201; 8,719; 11,154; 15,121. What is the annual
arithmetic mean number of degrees awarded? - Answer-
About 8,327
Which of the following measures of dispersion are based
on deviations from the mean? - Answer-All apply
From the easiest to the hardest "ease of interpretation,"
rank the measures of dispersion. - Answer-Range, mean
deviation, variance
,3|Page
The weights of a sample of crates ready for shipment to
Moscow, Russia are (in kilograms): 103, 97, 101, 106, and
103. What is the mean deviation? - Answer-2.4 kg
A sample of assistant professors on the business faculty at
state-supported institutions in Ohio revealed the mean
income to be $72,000 for nine months, with a standard
deviation of $3,000. Using Chebyshev's Theorem, what
proportion of the faculty earns more than $66,000, but less
than $78,000? - Answer-At least 75%
Based on the Empirical Rule, what percent of the
observations will lie between plus or minus two standard
deviations from the mean? - Answer-95%
What is the relationship between the variance and the
standard deviation? - Answer-Variance is the square of the
standard deviation.
What statistics are needed to draw a box plot? - Answer-
The minimum, maximum, median, first and third quartiles
, 4|Page
A box plot shows ___________. - Answer-The relative
symmetry of a distribution for a set of data
A dot plot can be used to show _________________. -
Answer-The distribution for a quantitative variable
If a student places in the 99th percentile on an exam, she
performed better than 99% of all students who completed
the exam. Her performance is similar to a statement based
on a __________. - Answer-Cumulative frequency
distribution
The main purpose of descriptive statistics is to - Answer-
Summarize data in a useful and informative manner
Which word is NOT part of the definition of descriptive
statistics? - Answer-Predicting
A marketing class of 50 students evaluated the instructor
using the following scale: superior, good, average, poor,
and inferior. The descriptive summary showed the
following survey results: 2% superior, 8% good, 45%
average, 45% poor, and 0% inferior. - Answer-c. Most
students rated the instructor as poor or average.
