HCD 300 EXAM 2 QUESTIONS AND
ANSWERS ALL CORRECT
This is a variable that is not of interest but may influence the outcome of an experiment
- Answer- extraneous variable
This is the variable that is changed by the other variables the researcher is considering -
Answer- dependent variable
This is an error in design or execution of a study which produces inaccurate results -
Answer- bias
The process of hypothesis testing starts with this assumption - Answer- the null
hypothesis is true
This when we fail to reject the null - Answer- p-value is greater than alpha, the results
are not significant
T/F: The test statistic is also called the obtained value - Answer- True
Determining Significance: compare obtained value to - Answer- critical value
If we change our clinical practice as a result of findings we have - Answer- practical
significance, clinical significance
This is what sigma (σ) represents in the z-test formula. - Answer- standard deviation(
population )
T/F: alpha= type 1 error - Answer- True
The probability of rejecting the null when the null is true - Answer- alpha, type 1 error,
level of significance
T/F: Data with a skew of -1.5 are considered normally distributed - Answer- True
Central Limit Theorem - Answer- As you sample size increases, your distribution will
more closely approximate a normal distribution
Normal Distribution - Answer- data will be around a central value with no bias left or
right
ANSWERS ALL CORRECT
This is a variable that is not of interest but may influence the outcome of an experiment
- Answer- extraneous variable
This is the variable that is changed by the other variables the researcher is considering -
Answer- dependent variable
This is an error in design or execution of a study which produces inaccurate results -
Answer- bias
The process of hypothesis testing starts with this assumption - Answer- the null
hypothesis is true
This when we fail to reject the null - Answer- p-value is greater than alpha, the results
are not significant
T/F: The test statistic is also called the obtained value - Answer- True
Determining Significance: compare obtained value to - Answer- critical value
If we change our clinical practice as a result of findings we have - Answer- practical
significance, clinical significance
This is what sigma (σ) represents in the z-test formula. - Answer- standard deviation(
population )
T/F: alpha= type 1 error - Answer- True
The probability of rejecting the null when the null is true - Answer- alpha, type 1 error,
level of significance
T/F: Data with a skew of -1.5 are considered normally distributed - Answer- True
Central Limit Theorem - Answer- As you sample size increases, your distribution will
more closely approximate a normal distribution
Normal Distribution - Answer- data will be around a central value with no bias left or
right
