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Chapters 1-4 Concepts by Jahnavi and Awtumn Flashcards | StudBud
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Chapters 1-4 Concepts by Jahnavi and Awtumn
Chapters 1-4 Concepts by Jahnavi and Awtumn
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1
You are investigating whether there's a correlation between children's heights and their sat score, what is the i.v. ?
you
sat score
?
children's height
2
the y variable is typically the response variable
False
True
3
the correlation of the scatterplot is........
negative
positive
4
What method places groups in an experimental study?
Response variable
Simple random sample
Random assignnment
Voluntary Response
5
Empirical Rule is...
69-95-99.7
69-420
68-95-99.7
68-96-99.7
6
The following numbers below show the results from the Statistics exam. Bob scored 69 on the exam what is his percentile?
42
69
43
45
7
The grades on a stats exam are roughly symmetric with a mean of 90 and a SD of 3. I got a 96. What my z score?
-2
0.2
2
-3
8
outliers dont impact the lsrl
False
True
9
Treatment is what is being done to the patients
False
True
10
...is a type of probability sampling in which the researcher randomly select
Stratified Random Sampling
Simple Random Sampling
Matched Pairs
Beats me lol
11
If a histogram is skewed what is the best estimate of the center of a skewed graph?
median
mean
12
Which of the following
DOESN'T
change on mutliplying?
center
shape
median
range
13
find the mean
64.5
69.2
63.8
62.5
14
A srs chooses a group from the population so that everyone and group of individuals have an equal chance of being chosen
True
False
15
What are the chances that someone likes dogs but dislikes cats?
11/15
20%
1/15
3/15
16
A scored a 92 with μ=88 and σ=2.7. J scored a 86 with μ=82 and σ=1.8. Who scored better? Why?
J as their z-score is 2.22 and A's is 1.48
A as their z-score is 4.20 and J's is 1.69
idk
17
The data set contains:
4 variables; 2 of which are categorical
4 variables; 3 of which are quantitative.
3 variables; 1 of which are quantitative
7 variables; 6 of which are categorical.
