Beans: Parameter and Hypotheses In the tigerstats package we find the beans data frame: data(beans) View(beans) help(beans) This was a repeated measures-experiment performed at UC-Davis; fifteen students participated. Each student was asked to place as many beans into a cup as he/she could, in 15 seconds. Each student performed this task once with the dominant hand, and once with the non-dominant hand, but the order of performance was randomized. Assume that the subjects in the experiment are the fifteen students. (Reminder about terminology: your dominant hand is the hand you use the most.) The Research Question was: Which hand is more dextrous: the dominant hand, or the non-dominant hand? We would like to perform a two-sided test of significance to answer this question. Which of the following options is the best way to define the parameter of interest and to state Null and Alternative hypotheses? (Note: "!=" stands for "not equal to") Group of answer choices ( ) Let mu-d = the mean difference in the number of means moved (dominant hand minus non-dominant hand), for all students at UC-Davis. H0: mu-d = 0 Ha: mu_d != 0 ( ) Let mu-d = the mean difference in the number of means moved (dominant hand minus non-dominant hand), for all students at UC-Davis. H0: mu-d = 0 Ha: mu_d > 0 ( ) Let mu-d = the mean difference in the number of means moved (dominant hand minus non-dominant hand), for all students at UC-Davis. H0: mu-d != 0 Ha: mu_d = 0 ( ) H0: mu-d = 0 Ha: mu_d != 0
Beans: Parameter and Hypotheses
In the tigerstats package we find the beans data frame:
data(beans)
View(beans)
help(beans)
This was a repeated measures-experiment performed at UC-Davis; fifteen students participated. Each student was asked to place as many beans into a cup as he/she could, in 15 seconds. Each student performed this task once with the dominant hand, and once with the non-dominant hand, but the order of performance was randomized. Assume that the subjects in the experiment are the fifteen students. (Reminder about terminology: your dominant hand is the hand you use the most.)
The Research Question was:
Which hand is more dextrous: the dominant hand, or the non-dominant hand?
We would like to perform a two-sided test of significance to answer this question. Which of the following options is the best way to define the parameter of interest and to state Null and Alternative hypotheses? (Note: "!=" stands for "not equal to")
( ) Let mu-d = the
H0: mu-d = 0 Ha: mu_d != 0
( ) Let mu-d = the mean difference in the number of means moved (dominant hand minus non-dominant hand), for all students at UC-Davis.
H0: mu-d = 0 Ha: mu_d > 0
( ) Let mu-d = the mean difference in the number of means moved (dominant hand minus non-dominant hand), for all students at UC-Davis.
H0: mu-d != 0 Ha: mu_d = 0
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