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quiz for stats
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Exam of 3 pages for the course BSMM-8320 at U of W (quiz for stats)
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MCQMidterm 1
Fall 2021
1. A sample of families with children at a local school is found to have a mean of 3.2
members per family. The mode number of family members is 2 and the median number
is 2.0. Based on this information, which statement is true?
A) The skewness of the distribution is unknown.
B) The distribution is symmetric.
C) The distribution is right-skewed.
D) The distribution is left-skewed.
Answer C
2. Which of the following statements is false?
A) The length of the box in a boxplot is equal to IQR.
B) The median and quartiles divide data into four equal parts.
C) The median and quartiles divide data into three equal parts.
D) The upper quartile (Q3) is the value with a quarter of the data above it.
E) The lower quartile (Q1) is the value with a quarter of the data below it.
Answer: C
3. The asking price for homes in the Winnipeg real estate market has a mean value of
$286,455 and a standard deviation of $11,200. The mean and standard deviation in
asking price for homes in Moncton are $188,468 and $8,230, respectively. Recently,
one home sold in each city where the asking price for each home was $225,000. Based
on these data, which of the following statements is true?
A) The variance for Winnipeg real estate market is lower than that for Moncton.
B) The Moncton home has a negative standardized value.
C) The coefficients of variation are very close to each other (both are about 0.04).
D) The Winnipeg home has a positive standardized value.
E) Both homes have the same z-score.
Answer: C
4. A study examined consumption levels of oil and carbon dioxide emissions for a sample
of municipalities. The response variable in this study is
A) oil brands.
B) oil consumption levels.
C) carbon dioxide emissions.
D) municipalities.
E) oil prices.
Answer: C
5. In discussing how its customers use online services, a bank manager noted "there
seems to be a strong correlation between the use of the online bill paying feature and
gender". Which of the following is true regarding this statement?
A) The correlation between the use of online bill paying feature and gender is negative.
B) The correlation between the use of online bill paying feature and gender is positive.
C) There may be an association between the use of online bill paying feature and gender,
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