HCD 300 - Homework 2 Question and
answers rated A+ 2025
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 - correct answer ✔-
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 _________? - correct answer ✔- Range
True or False, the sum of the deviations from the mean will always equal 0. -
correct answer ✔- 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 - correct answer ✔-
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 - correct
answer ✔- 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? -
correct answer ✔- 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). - correct answer ✔- 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? - correct answer ✔- Ratio
Which of the following measures of central tendency can be used for nominal
level data? (choose one or more) - correct answer ✔- Mode
Which of the following descriptive statistics can be used for ratio data?
(choose one or more) - correct answer ✔- Mode
- Variance
- Mean
- Standard Deviation
Which of the following are nominal data? (choose one or more) - correct
answer ✔- 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 rated A+ 2025
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 - correct answer ✔-
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 _________? - correct answer ✔- Range
True or False, the sum of the deviations from the mean will always equal 0. -
correct answer ✔- 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 - correct answer ✔-
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 - correct
answer ✔- 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? -
correct answer ✔- 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). - correct answer ✔- 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? - correct answer ✔- Ratio
Which of the following measures of central tendency can be used for nominal
level data? (choose one or more) - correct answer ✔- Mode
Which of the following descriptive statistics can be used for ratio data?
(choose one or more) - correct answer ✔- Mode
- Variance
- Mean
- Standard Deviation
Which of the following are nominal data? (choose one or more) - correct
answer ✔- 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
