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Standard Stats: Binomial and Normal Distributions Review Flashcards | StudBud
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Standard Stats: Binomial and Normal Distributions Review
Standard Stats: Binomial and Normal Distributions Review
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1
The expected value of a binomial probability distribution with n = 10 and p = 0.95 is:
9.5
0.95
0.50
10
2
A normal distribution of data is symmetrical about the:
mean
standard deviation
the statistician
Q1
3
How would you find the probability that the will student get 8 or fewer answers correct in exam?
Find the cumulative probability for 8 in B( 20, 0.5)
Find the probability that X=8 in B(20,0.5)
Find the prob. that X=8 in a N(10, 5)
Find the area btw 0 and 8 in a uniform distn from 0 to 20
4
What is a
population
in statistics?
The entire group of individuals or items of interest
A measure of central tendency
The result of a statistical test
A small subset of data selected for analysis
5
Which measure of
spread
is better for normal distributions (normal spread)
Standard Deviation
Mode
IQR
Mean
6
In binomial distribution, which is the formula for calculating the mean?
μ = pq
μ = p + q
μ = qn
μ = np
7
A binomial random variable is:
unlimited
discrete
deterministic
continuous
8
What is a binomial random variable
the count of successes in a binomial setting
the count of successes in a geometric setting
the count of failures in a geometric setting
The count of failures in a binomial setting
9
What is a sample in statistics?
Everyone we want to know about
A smaller group of the population
Something you get at Costco
A penguin
10
Normal distribution curve is explained using:
Mean and standard deviation
Mean and sample
Median and standard deviation
Mean and median
11
A binomial distribution has a set number of trials
False
True
It depends
12
In binomial distribution, formula of calculating standard deviation is
square root of p(1-p)
square root of p
square root of np
square root of np(1-p)
13
In a binomial experiment, outcome of each trial is _____________ from the others.
Unconditional
Conditional
Dependent
Independent
14
What is the
standard deviation
of the following Normal Distribution curve?
42
6
5
7
