## Transcribed Text

Question 1. The following data were recorded for 127 people at their last health examination:
Mean Median Mode Minimum Q1 Q3 Maximum Range Standard
Deviation
Age 54.9 55 55 30 48 63 82 52 11.2
Months
since last
visit to
dentist
14.9 3.0 1.0 0 1.0 12.0 263 34.2
Months
since last
visit to
PCP
6.6 2.0 1.0 0 1 6 174 174 16.1
HbA1c
reading
6.2 5.9 5.7 5.4 5.6 6.2 10.1 .97
a. Find the range in HbA1c readings. ________
b. Find the maximum “months since last visit to a dentist.” ________
c. With regard to “months since last visit to PCP”:
i. In which way is the frequency distribution skewed? ______________________
ii. Is there at least one outlier? __________ Please explain your answer.
________________________________________________________________________
iii. If there is at least one outlier and it/they is/are removed, which measure of central
tendency is most likely to change? ______________
d. With regard to “age”:
i. What is its IQR? ______
ii. Is “age” close to having a symmetric distribution? _________ Please explain your
answer.
________________________________________________________________________
Question 2. The same 127 individuals as in Question 1 reported the number of minutes since they
last ate or drank something other than water:
Range in minutes Frequency
600-650 37
651-700 36
701-750 20
751-800 18
801-850 10
851-900 6
a. Find the median group for “range in minutes” since they last ate or drank something other than
water.
___________
b. In which way is the distribution skewed? __________________ Please explain your answer.
____________________________________________________________________________
Question 3: For each of the following, indicate the level of measurement, the best measure of
central tendency, and the best measure of dispersion. Assume normal distributions and/or no
extreme values.
Note: Some of the terms below may be used more than once. Some of the terms below may not be
required to answer this question.
Interval IQR Mean Median
Mode Range Variance Ordinal
Nominal Ratio None Standard deviation
Variable
name
Level of
measurement
Best measure of
central tendency
Best measure of
dispersion
Nurse’s job
preference (hospital,
private office,
community clinic)
Temperature readings
in Florida in July
(Fahrenheit scale)
Nurse’s year in
college (freshman,
sophomore, junior,
senior)
Patient’s triglyceride
value

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a. Find the range in HbA1c readings. ___4.7___

b. Find the maximum “months since last visit to a dentist.” ___263___

c. With regard to “months since last visit to PCP”:

i. In which way is the frequency distribution skewed? ___positive_or to the right_____

ii. Is there at least one outlier? ___Yes____ Please explain your answer.

The maximum point of 174 is clearly larger than 1.5 times IQR of 5=6-1.

iii. If there is at least one outlier and it/they is/are removed, which measure of central tendency is most likely to change? _____mean______...