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Quant- week 1-3 quiz Flashcards | StudBud
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Quant- week 1-3 quiz
Quant- week 1-3 quiz
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Questions
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Answers
1
Standard deviation of the sampling distribution is called the standard error
True
False
2
What kind of sampling is this?
Random stratified
Convenience
Simple random
Random cluster
3
What state is missing ?
measurment of variables
conceptualization
descritive statistics
hypothesis testing
4
If P(A) = 7/13, P(B) = 9/13 and P(A∩B) = 4/13, then P(A|B) =
4/9
True
False
5
it has to be replaced after 4000 km and 14000 km is covered by it?
0.535
0.275
0.77
0.563
6
Inferential statistics are used to make descriptions on the population of interest
False
True
7
What is a population parameter
a range between which we are confidence the true mean will fall under
when you have a 95% confidence of an inferential statistic
numbers that describe the properties of samples
numbers that describe the properties of entire populations
8
the collection, or set, of all possible outcomes of a given experiment is the
sample space
probability
confidence interval
inferential statistics
9
Non-normal distributions still give us a normal-shaped sampling distribution
True
False
10
why is range a misleading measure of dispersion? (one word)
doesnt capture mean
mode is not considered
influenced by outliers
range can be very larger
11
how many heads would you expect to see in 2 flips? ans=1.5
False
True
12
What does this measure? (Hint: Intuitive measure of how weird any one observation is)
copy afraz
standard error
who knows?
standard deviation
13
What is an example of an inferenctial statistic?
Average age of a sample of 200 Canadians
average age of Canadians
Average age of a group of 200 Canadians
Average age of Canadians in our class
14
Throwing a dice
is an example of a
Bernoulli distribution
True
False
15
What kind of a variable is GDP?
numerical discrete
Numercial nominal
numerical ordinal
Numerical continuous
16
Whats the probability of getting no head (lol)?
0.2
0.24
0.55
0.21
17
In a random sample, as our sample size grows, the sample mean gets further from the average of the whole population.
True
False
