HCD 300 - Homework 2 Exam #1 Questions with correct
answers
What is the variance (s2) of the following set of scores?
12, 25, 6, 9, 16, 13, 11, 10, 8, 7, 6, 14, 16, 12, 11, 23 - ✔✔- 30.13
The three measures of variability commonly used to reflect the spread or
dispersion in a group of scores are the standard deviation, the variance, and the
_________? - ✔✔- Range
True or False, the sum of the deviations from the mean will always equal 0. - ✔✔-
True
What is the standard deviation (s) of the following set of scores?
12, 25, 6, 9, 16, 13, 11, 10, 8, 7, 6, 14, 16, 12, 11, 23 - ✔✔- 5.49
What is the range of the following set of scores?
13.7, 53.2, 4.1, 9.3, 52.1, 32.5, 22.9, 41.5, 23.0, 15.5, 1.9, 33.2 - ✔✔- 51.3
Researchers collect data about JUULing by asking users to keep track of the
number of times per day they turn their device on and the number of inhalations
each time they turn the device on. What type of data are these? - ✔✔- Ratio
Researchers collect continuous data with values ranging from 0-100. In the
analysis phase of their research they decide to categorize the values in different
ways. Given the way the researchers are examining the data - determine if the
data would be considered nominal, ordinal or ratio (you may use choices more
, than once). - ✔✔- Two categories (low vs. high) frequency (count) of values
between 0-49 and frequency of values between 50-100 - ordinal
- Three categories (low, medum, high) frequency (count) of values between 0-25,
26-74, & 75-100) - ordinal
- Analyze each number in the set individually - ratio
What level of measurement is household income? - ✔✔- Ratio
Which of the following measures of central tendency can be used for nominal
level data? (choose one or more) - ✔✔- Mode
Which of the following descriptive statistics can be used for ratio data? (choose
one or more) - ✔✔- Mode
- Variance
- Mean
- Standard Deviation
Which of the following are nominal data? (choose one or more) - ✔✔- three
streets (Dove, Raven, Hawk) in a neighborhood
- five categories of race
- two categories of exposure to a treatment (exposed and unexposed)
Calculate a correlation matrix for the following data. Which two variables have a
strong positive relationship?
Fructosamine: 152,173,174,175,176,183,188,192,202,205,210,215,220,258
# of Group Visits Attended: 6,5,4,4,3,2,3,3,2,2,1,2,2,1
answers
What is the variance (s2) of the following set of scores?
12, 25, 6, 9, 16, 13, 11, 10, 8, 7, 6, 14, 16, 12, 11, 23 - ✔✔- 30.13
The three measures of variability commonly used to reflect the spread or
dispersion in a group of scores are the standard deviation, the variance, and the
_________? - ✔✔- Range
True or False, the sum of the deviations from the mean will always equal 0. - ✔✔-
True
What is the standard deviation (s) of the following set of scores?
12, 25, 6, 9, 16, 13, 11, 10, 8, 7, 6, 14, 16, 12, 11, 23 - ✔✔- 5.49
What is the range of the following set of scores?
13.7, 53.2, 4.1, 9.3, 52.1, 32.5, 22.9, 41.5, 23.0, 15.5, 1.9, 33.2 - ✔✔- 51.3
Researchers collect data about JUULing by asking users to keep track of the
number of times per day they turn their device on and the number of inhalations
each time they turn the device on. What type of data are these? - ✔✔- Ratio
Researchers collect continuous data with values ranging from 0-100. In the
analysis phase of their research they decide to categorize the values in different
ways. Given the way the researchers are examining the data - determine if the
data would be considered nominal, ordinal or ratio (you may use choices more
, than once). - ✔✔- Two categories (low vs. high) frequency (count) of values
between 0-49 and frequency of values between 50-100 - ordinal
- Three categories (low, medum, high) frequency (count) of values between 0-25,
26-74, & 75-100) - ordinal
- Analyze each number in the set individually - ratio
What level of measurement is household income? - ✔✔- Ratio
Which of the following measures of central tendency can be used for nominal
level data? (choose one or more) - ✔✔- Mode
Which of the following descriptive statistics can be used for ratio data? (choose
one or more) - ✔✔- Mode
- Variance
- Mean
- Standard Deviation
Which of the following are nominal data? (choose one or more) - ✔✔- three
streets (Dove, Raven, Hawk) in a neighborhood
- five categories of race
- two categories of exposure to a treatment (exposed and unexposed)
Calculate a correlation matrix for the following data. Which two variables have a
strong positive relationship?
Fructosamine: 152,173,174,175,176,183,188,192,202,205,210,215,220,258
# of Group Visits Attended: 6,5,4,4,3,2,3,3,2,2,1,2,2,1
