Difference Between Groups Using Two-sample Inference

10 Questions | By Cripstwick | Updated: Mar 20, 2022 | Attempts: 131

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Difference Between Groups Using Two-sample Inference - Quiz

With a combination of significance tests and confidence intervals, evaluate your knowledge of how to use two-sample inference to define the difference between groups.

Questions and Answers

1.

Hypotheses convening the relative size of the means of two population are tested by...
- A.
  
  Sample value and P-value
- B.
  
  Critical Values and P-value
- C.
  
  Confidence Interval
- D.
  
  Point estimate and P-value
2.

Independent values are composed of groups that are in no way matched to them.
- A.
  
  Always true
- B.
  
  Often true
- C.
  
  Occasionally true
- D.
  
  Never true
3.

A point estimate for the difference in two group population is the...
- A.
  
  Difference in different sample means
- B.
  
  Difference in standardised test statistics
- C.
  
  Similarities in different sample means
- D.
  
  Difference in corresponding sample means
4.

A dependent sample is one where two groups are formed from matched pairs.
- A.
  
  Always true
- B.
  
  Often true
- C.
  
  Occasionally true
- D.
  
  Never true
5.

Which of these is the procedure used to test hypotheses concerning a single population?
- A.
  
  3 steps
- B.
  
  4 steps
- C.
  
  5 steps
- D.
  
  6 steps
6.

The null and alternative hypotheses will always be expressed in terms of...
- A.
  
  Similarities of the two population means
- B.
  
  Difference in confidence interval
- C.
  
  Differences of the two population means
- D.
  
  Similarities in confidence interval
7.

The number s d is an estimate of the standard deviations σd of the population of differences.
- A.
  
  True
- B.
  
  False
- C.
  
  Not defined
- D.
  
  Depends on some factors
8.

Hypotheses testing is an integral part of research.
- A.
  
  True
- B.
  
  False
- C.
  
  Maybe
- D.
  
  Depends on some factors
9.

When the data are collected in pairs, the differences computed for each pair is...
- A.
  
  Different from the data used in formulas
- B.
  
  Different from the data used in confidence interval
- C.
  
  The data that are used in the formulas
- D.
  
  The data used in confidence interval
10.

The quantity sp2 is called the pooled sample variance.
- A.
  
  True
- B.
  
  False
- C.
  
  Maybe
- D.
  
  Depends on some factors