how far a value is from the mean

What is bias in sampling?

a sample that doesn’t represent the population

What are mutually exclusive events?

events that cannot happen at the same time

What are independent events?

events that don’t affect each other

How do you find expected value?

multiply each value by its probability and add

What does the z-table show?

probability to the left of a z-score

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Statistics review quiz by Mabedaisy Medina per.2

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Questions 20

Answers

1
What is an outlier?
a repeating number
a percentage
the average
a value far from others
2
What is a standard normal distribution?
Mean=1, SD=1
Mean=0, SD=10
Mean=0, SD=1
Mean=1, SD=0
3
What is the binomial probability formula?
(nCx) x x^2
(nCx) x p^x(1-p)^(n-x)
x/n
(n+x)p
4
What is standard deviation?
the number of data points
the total of all values
the difference between highest and lowest
measure of data spread
5
What is the addition rule in probability?
P(A or B)=P(A)xP(B)
P(A and B)+P(A or B)
P(A or B)=P(A)+P(B)-P(A and B)
P(A)xP(B)
6
What is the median?
the most frequent value
the highest value
the average
the middle value
7
What is a z-score?
the maximum data point
the size of a sample
the total of values
how far a value is from the mean
8
What is descriptive statistics?
Summarizing data
sampling methods
Making predictions
Using z-scores
9
What is expected value?
the smallest outcome
Probability of success
long term average outcome
number of trials
10
What is a population in statistics?
just one data point
a chart of results
the entire group being studied
A sample group
11
What is bias in sampling?
using random numbers
a sample that doesn’t represent the population
graphing the data
calculating the mean
12
What are mutually exclusive events?
events that cannot happen at the same time
events that are biased
events with equal outcomes
events that always happen together
13
What are independent events?
events that always happen together
events that don’t affect each other
events with equal probability
Events that cancel each other
14
What is the Empirical rule?
99.7% within 1 SD
25%,50%,75%
50% within 1 SD
68%,95%,99.7% within 1,2,3 SDs
15
What is binomial experiment?
experiment with only one trial
data with more than two outcomes
fixed trials with two outcomes
unlimited possible results
16
What is the multiplication rule for independent events?
P(A and B) = P(A) x P(B)
P(A) - P (B)
P(A + B)
P(A or B)
17
How do you find expected value?
add all outcomes
multiply trials by success
Subtract each value from the mean
multiply each value by its probability and add
18
What is the IQR ( interquartile Range)?
Q1+Q3
Q3 / Q1
Q1xQ3
Q3-Q1
19
What is a sample?
entire population
all possible outcomes
subset of the population
data set average
20
What does the z-table show?
sample standard deviation
mean of the population
probability to the left of a z-score
total number of outcomes

Statistics review quiz by Mabedaisy Medina per.2 Flashcards | StudBud