Two hundred thirty-one students were randomly assigned to read either digital (n1=119) or paper (n2=112) versions of a leadership essay. Students were then given a 10-item multiple-choice test of recall. The digital students scored an average of x¯1=72 while the paper students scored an average of x¯2=78. Their standard deviations were respectfully: s1=12 and s2=16. Researchers
Two hundred thirty-one students were randomly assigned to read either digital (n1=119) or paper (n2=112) versions of a leadership essay. Students were then given a 10-item multiple-choice test of recall. The digital students scored an average of x¯1=72 while the paper students scored an average of x¯2=78. Their standard deviations were respectfully: s1=12 and s2=16. Researchers
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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Author:Carter
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Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 10CYU
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Two hundred thirty-one students were randomly assigned to read either digital (n1=119) or paper (n2=112) versions of a leadership essay. Students were then given a 10-item multiple-choice test of recall. The digital students scored an average of x¯1=72 while the paper students scored an average of x¯2=78. Their standard deviations were respectfully:
s1=12 and s2=16.
Researchers are interested to determine if reading the paper version of the leadership essay increases the students scores on the recall test. The hypotheses needed to perform this test are
H0:μ1=μ2
and
a. Ha:μ1<μ2
b. Ha:μ1≠μ2
c. Ha:μ1>μ2
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