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Exam of 7 pages for the course BSMM-8320 at U of W (Quiz for stats)
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Last Name: Student Number:First Name:
Midterm
BSMM 8320
Winter 2022
Chapter 5
1. The asking price for homes on the real estate market in Winnipeg 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, what conclusions can be drawn?
A) The two homes have the same z-score.
B) The distribution of the asking prices is symmetric in both cities.
C) The home sold in Winnipeg is relatively further from its mean than the home sold in Moncton.
D) The asking price of homes in Moncton is less variable than those in Winnipeg.
Answer: C
2. 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 population mean is greater than 3.2.
B) The distribution is symmetric.
C) The distribution is right-skewed.
D) The distribution is left-skewed.
E) The distribution is bell-shaped.
Answer: C
Chapter 6
3. Assume that a medical research study found a correlation of -0.73 between regular use of sunscreen and the skin
cancer rate. This could be interpreted to mean that
A) the greater the regular use of sunscreen, the lower the person's chances of getting skin cancer.
B) skin cancer is caused by not using sunscreen regularly.
C) the greater the regular use of sunscreen, the higher the person's chances of getting skin cancer.
D) skin cancer can be prevented by regular use of sunscreen.
E) the lower the regular use of sunscreen, the lower the person's chances of getting skin cancer.
Answer: A
, Last Name: Student Number:
First Name:
4. A study was done in which the daily temperature and the number of traffic accidents within the city were recorded.
The standard deviations for the samples are 13.13 for temperature and 2.55 for accidents. These sample data are
shown as follows:
Temperature Traffic accidents
33 7
13 4
24 9
20 10
-2 5
Given these data, the sample correlation is approximately
A) 0.5453
B) -0.1162
C) 0.3883
D) -0.5453
E) -0.3883
Answer: A
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 and gender is negative.
B) The correlation between the use of online bill paying and gender is positive.
C) There may be an association between the use of online bill paying and gender, but these variables are both
categorical so they cannot be correlated.
D) More males will bank online compared with females.
Answer: C
Chapter 7
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