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Data Analysis Week 6 Flashcards | StudBud
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Data Analysis Week 6
Data Analysis Week 6
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1
Nursing salaries: Xbar = $76,503, s=8850. What salary above Xbar represents only a 5% chance of occuring given the dist.
61,259.10
75,000
100,000
$ 91,061.25
2
A null hypothesis is about the population, whereas the research (alternative) hypothesis is about the sample.
False
True
3
What proportion of birthheight (cm) scores in a normal distribution with a Xbar = 50, and s=10 is below 26?
82 %
5 %
Less than 1 %
49.18 %
4
There will be NO difference in weight loss between DRUG A and PLACEBO is a:
Research Hypothesis
Null Hypothesis
Directional Research Hypothesis
Nondirectional Research Hypothesis
5
The most rare event is
c
b
a
d
6
Pick the descriptions that apply to z Scores. A z score:
is the number of standrd deviations above or below the mean
describes a data points relative position within its distribution
only theoretical
is the probabibilty of a data point
7
Which student is doing better in their respective classes.
student on the right
student in the middle
student on the left
Can't tell because each student is in a different class
8
What is the probability that a student scored higher than our friend below, in programming concepts?
approximately 2.5 %
47.72 %
Can't tell from the information given
20 %
9
What proportion of birthheight scores in a normal distribution with a Xbar =50, and s=10 is between 55 and 70?
47 %
28.57 %
< 10 %
.2857 %
10
81 year old Grandpa noz-hairs moved to a retirement home. Calculate his z-score if age of occupants: Xbar= 72 and s=6
-3
-1.5
3
1.5
11
Which student has the same grade as the average grade in their class.
student in the middle
Can't tell from the information given
student on the left
student on the right
