f the results of an “F-test” are statistically significant, that means for the variable being measured,...
f the results of an “F-test” are statistically significant, that means for the variable being measured, the variation in one of the populations is greater than the variation in the other population. True False
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f the results of an “F-test” are statistically significant, that
means for the variable being measured,...
Statistically significant results from ANOVA tell you which groups' means differ from each other. a. true...
Statistically significant results from ANOVA tell you which groups' means differ from each other. a. true b. false
In comparing two population means, an unpaired test provides more precise results than a paired test...
In comparing two population means, an unpaired test provides more precise results than a paired test because the unpaired test uses two independent samples while the paired test uses a single sample. True O False Question 2 1 pts When comparing two population means, if the variations which are unique to each population are very small compared to the variations which are common to both populations, it is reasonable to assume that the population standard deviations are not equal. O...
When adding another predictor test to a test battery results in a statistically significant increase in...
When adding another predictor test to a test battery results in a statistically significant increase in the "explained variance" (i.e., increases R2), this means that the cost of the predictor outweighs the economic benefits from using the predictor. predictor has a high validity coefficient. predictor has incremental validity. predictor is highly correlated with other predictors, thus increasing efficiency.
Which statement is equivalent to a statistically significant independent t-test? Select all that are true. ...
Which statement is equivalent to a statistically significant independent t-test? Select all that are true. Retain the null hypothesis. The p-value is less than .05. The 95% confidence interval for the difference of means does not contain 0. Alpha is greater than .05.
The results of a study examining the effectiveness of two instructional strategies indicated a statistically significant...
The results of a study examining the effectiveness of two instructional strategies indicated a statistically significant difference between the means of the two treatment groups on an achievement test. Which of the following is a reasonable conclusion? a. We can be 95% confident one instructional strategy is better than the other. b. The difference between the two instructional strategies is meaningful. c. It is likely one instructional strategy is more effective. d. Both instructional strategies are equally effective.
Question 2 1 pts In an ANOVA test comparing several population means, if the alternative hypothesis...
Question 2 1 pts In an ANOVA test comparing several population means, if the alternative hypothesis is true, the F statistic tends to be close to zero. True False Question 3 1 pts If the two variables in a two-way table are not associated, the conditional distributions in the table are similar to each other. O True False Question 4 1 pts In a multiple regression model, if the P-value associated with the F test is less than the significance...
Researchers often indicate statistical significance with stars. No stars means the result is not statistically significant...
Researchers often indicate statistical significance with stars. No stars means the result is not statistically significant at a 10% level. One star means the result is statistically significant at a 10% level (but not a 5% level). Two stars means the result is statistically significant at a 5% level (but not a 1% level). Three stars means the result is statistically significant at a 1% level. Suppose that in testing a TWO-TAILED hypothesis test about the mean with a sample...
Pls answer these questions 17 Causal research designs are experimental. TRUE FALSE 18 Pure research is...
Pls answer these questions 17 Causal research designs are experimental. TRUE FALSE 18 Pure research is also referred to as basic research. TRUE FALSE 19 Results from a qualitative research study can be generalized to a population. TRUE FALSE 20 Hypothesis tesing is used to prove facts. TRUE FALSE 21 An independent variable is also known as a predictor variable. TRUE FALSE 22 A dependent variable is also known as an outcome variable. TRUE FALSE An alternative hypothesis is a...
please answer all questions 12-15 Question 12 2 pts The phrase statistically significant means that the...
please answer all questions 12-15
Question 12 2 pts The phrase statistically significant means that the op value associated with the test statistic is greater than the p level chosen o research finding is of practical importance o sample mean is larger than the population mean o data differ from what we would have expected by chance (if the null were true) Question 13 2 pts Garret thinks his car battery is becoming weak. He doesn't want to be stranded...
a) A result is statistically significant if it is unlikely to occur by random chance alone. true or...
a) A result is statistically
significant if it is unlikely to occur by random chance
alone.
true or false
b) If a result is NOT statistically significant, that
means the chance model must be true.
true or false
c) there are always two possible explanations for the
statistics obtained from a sample. Select the two possible
explanations below.
Generalizability
Something is going on
Random chance
Sampling bias
d) what does the researcher's question, or what the
researcher thinks is true, determine?...
In comparing two population means, an unpaired test provides more precise results than a paired test because the unpaired test uses two independent samples while the paired test uses a single sample. True O False Question 2 1 pts When comparing two population means, if the variations which are unique to each population are very small compared to the variations which are common to both populations, it is reasonable to assume that the population standard deviations are not equal. O...
Question 2 1 pts In an ANOVA test comparing several population means, if the alternative hypothesis is true, the F statistic tends to be close to zero. True False Question 3 1 pts If the two variables in a two-way table are not associated, the conditional distributions in the table are similar to each other. O True False Question 4 1 pts In a multiple regression model, if the P-value associated with the F test is less than the significance...
please answer all questions 12-15
Question 12 2 pts The phrase statistically significant means that the op value associated with the test statistic is greater than the p level chosen o research finding is of practical importance o sample mean is larger than the population mean o data differ from what we would have expected by chance (if the null were true) Question 13 2 pts Garret thinks his car battery is becoming weak. He doesn't want to be stranded...
a) A result is statistically
significant if it is unlikely to occur by random chance
alone.
true or false
b) If a result is NOT statistically significant, that
means the chance model must be true.
true or false
c) there are always two possible explanations for the
statistics obtained from a sample. Select the two possible
explanations below.
Generalizability
Something is going on
Random chance
Sampling bias
d) what does the researcher's question, or what the
researcher thinks is true, determine?...
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