Mastering Statistics Flashcards | StudBud

Mastering Statistics

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Questions 38

Answers

1
What is a P-value?
Measure of dispersion
Type of distribution
Central tendency
Probability of observed results
2
Why take two samples?
Test single hypothesis
Compare populations
Organize data
Summarize data
3
What is descriptive statistics about?
Estimating parameters
Predicting trends
Summarizing data
Testing hypotheses
4
Which is a continuous probability distribution?
Normal
Geometric
Poisson
Binomial
5
A hypothesis test is for testing claims
False
True
6
Samples must be random
False
True
7
Which is a type of stochastic variable?
Both A and B
Continuous
Neither A nor B
Discrete
8
What is a normal distribution?
Bimodal
Uniform
Bell-shaped
Skewed
9
Z-distribution has mean 0
True
False
10
What is a sample?
Central tendency
Subset of population
Measure of dispersion
Entire population
11
Confidence interval estimates range
True
False
12
Normal distribution is continuous
True
False
13
Mean is a measure of central tendency
True
False
14
What is a stochastic variable?
Random values
Fixed value
Central tendency
Measure of dispersion
15
What is a tendency line?
Shows maximum value
Divides data equally
Shows data direction
Represents average value
16
State hypotheses, collect data, summarize data, make decision
True
False
17
Estimation infers population parameters
True
False
18
What is theoretical statistics about?
Proving theories
Organizing data
Collecting data
Summarizing data
19
Standard deviation measures dispersion
True
False
20
What is an estimation?
Distribution
Central tendency
Approximation
Hypothesis test
21
Which is a measure of central tendency?
Range
Mean
Variance
Standard deviation
22
Why take a sample?
Test hypotheses
Infer population
Organize data
Summarize data
23
A normal distribution is bell-shaped
False
True
24
What is a linear regression analysis?
Distribution
Hypothesis test
Model relationship
Central tendency
25
What is estimation about?
Inferring parameters
Testing hypotheses
Organizing data
Summarizing data
26
A stochastic variable can take random values
True
False
27
Significance level measures rejection probability
True
False
28
A sample is a subset of a population
False
True
29
Binomial distribution is discrete
False
True
30
Which is a discrete probability distribution?
Exponential
Binomial
Uniform
Normal
31
What is a confidence interval for?
Estimate range
Summarize data
Organize data
Test hypotheses
32
A tendency line shows data direction
False
True
33
What is a null hypothesis?
Central tendency
Effect or difference
Measure of dispersion
No effect or difference
34
What parameters to estimate?
Mode, range, median
Median, mode, range
Standard deviation, range, mode
Mean, variance, proportion
35
What is a measure of dispersion?
Mode
Standard deviation
Median
Mean
36
What is a hypothesis test?
Summarize data
Organize data
Estimate parameters
Test population claim
37
What are Z-distribution characteristics?
Mean 0, SD 2
Mean 2, SD 1
Mean 0, SD 1
Mean 1, SD 0
38
What is a distribution?
Central tendency
Organize data
Hypothesis test
Sampling method