In an interesting twist combining winter sport interest and fascination with very large people, 5 sumo wrestlers (average weight 350 lbs) are in town to try out for a new reality show “The Biggest Luger”.
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Quiz 1 (please show your work!)
1. (4
pts). ). In an interesting twist combining winter sport interest and
fascination with very large people, 5 sumo wrestlers (average weight 350 lbs)
are in town to try out for a new reality show “The Biggest Luger”. They have
stopped by our class (PY620- avg weight 150 lbs). How will the addition of
these 5 men change each of the following for the weight of our class:1) Mean
weight, 2) Median weight, 3) Standard deviation, and 4) Skew: (Hint; no calculations are needed to answer
this).
2. (4
pts) Calculate the mean, median, mode, and standard deviation for the following
set of numbers: 12,7,6,5,3,1,7.
a.
Mean=
b.
Median=
c.
Mode=
d.
Standard Deviation=
3.
(3 pts) Tom took a math test and got a score of
10. Mary took a math test in a different class and got a score of 9. If the mean =15 and standard deviation=5 in
Tom’s class and the mean =12 and standard deviation =4 in Mary’s class. Which
one did better on their exam?
4.
(1 pt) The Law of Large Numbers states that:
a.
As the font of the number increases so does it’s
legality.
b.
As the size of the sample increases, the mean of
the sample approaches the mean of the population.
c.
The distribution of sample means approximates the
normal distribution but only when the original distribution is perfectly
normal.
d.
The probability of mutually exclusive events are
added together.
5.
(1 pt) When a sample is negatively skewed:
a.
Extreme positive values pull the mean to the
right .
b.
The distribution of values is symmetrical.
c.
Extreme negative values pull the mean to the
left.
d.
The standard deviation is reduced.
6.
(1 pt) Of the following, which variable uses a
nominal level of measurement.
a.
Gender.
b.
Scared questionnaire.
c.
Health
(poor, fair, good, excellent).
d.
Height.
7.
(1 pt) Generally speaking, the ___________
variable measures the outcome.
a.
Dependent.
b.
Independent.
c.
Ratio scale
d.
Qualitative.
