I am the CEO of a company known for their self-assembly furniture (and meatballs). Lately, I have received a lot of feedback about improving the assembly instructions so I decided to conduct an experiment. One group of participants received new assembly instructions that included images and the other group received the old instructions without images (see variable: Directions). In order to determine which instructions were the most helpful, I measured the number of errors each participant made when assembling their furniture (variable: Errors).
I hypothesized that adding images to the directions would reduce the number of errors made during assembly. Once you have conducted the appropriate analysis, answer the questions below.
Which of the following is the null hypothesis?
Group of answer choices
H0: µ1 ≠ µ2
H0: µ1 = µ2
H1: µ1 ≠ µ2
H1: µ1 = µ2
Which of the following best represents the alternative, or research, hypothesis?
Group of answer choices
H0: X1 = X2
H1: X1 ≠ X2
H1: X1 = X2
H0: X1 ≠ X2
Based on your output, how many errors, on average, did the participants who received instructions with images make?
Type your answer in the blank below. Round to two decimals.
Based on your output, how many errors, on average, did the participants who received instructions without images make?
Type your answer in the blank below. Round to two decimals.
Based on your output, the t-value for testing the equality of means was _______.
Type your answer in the blank below. Round to two decimals.
Based on your output, the degrees of freedom for this test were ______.
Type your answer in the blank below.
True or False: Based on the output, the p-value suggests that we fail to reject the null hypothesis.
Group of answer choices
True
False
True or False: Based on our analysis, we can conclude that the number of errors made while assembling furniture significantly differed between groups.
Group of answer choices
True
False
Using your output, choose the correct answers to complete the APA formatted write up for your analysis.
The 250 participants who followed assembly instructions with images made [ Select ] ["the same amount of", "significantly fewer", "significantly more"]
errors (M = [ Select ] ["2.04", "1.09", ".05", "-.95"] ,
SD = .81) compared to the 250 participants who followed assembly instructions without images (M = [ Select ] [".05", "1.09", "-.95", "2.04"] , SD = .80), [ Select ] ["t (498) = -13.21, p < .001", "t (500) = 22.54, p = .09", "t (499) = .397, p = .529"] .
Thus, we can conclude that images [ Select ] ["significantly increased the number of errors", "significantly reduced the number of errors"] .