1:00 PM webassign.net Verizon (b) A researcher is interested in students\' opini

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1:00 PM webassign.net Verizon (b) A researcher is interested in students' opinions regarding an additional annual fee to support non-income-producing varsity sports. Students were asked to rate their acceptance of this fee on a seven-point scale. She received 99 responses, of which 30 were from students who attend varsity football or basketball games only, 17 were from students who also attend other varsity competitions, and 52 who did not attend any varsity games DFE = DFT = O The group of students who do not attend games has a higher mean rating O All groups have the same mean rating O At least one group has a different mean rating O The group of students who do not attend games has a lower mean rating O All groups have different mean ratings O The group of students who do not attend games has a lower mean rating All groups have the same mean rating O At least one group has a different mean rating O The group of students who do not attend games has a higher mean rating O All groups have different mean ratings numerator d denominator df (c) A professor wants to evaluate the effectiveness of his teaching assistants. In one class period, the 42 students were randomly divided into three equal-sized groups, and each group was taught power calculations from one of the assistants. At the beginning of the next class, each student took a quiz on power calculations, and these scores were compared DFG OFT O All groups have different mean quiz scores O The group taught by the oldest TA has a higher mean quiz score O At least one group has a different mean quiz score O All groups have the same mean quiz score O The group taught by the oldest TA has a lower mean quiz score

Explanation / Answer

(b) Here k = 3. DFG = k - 1 = 3 - 1 = 2

N= 99. DFE = N - k = 99 - 3 = 96

DFT = N-1 = 99 - 1 = 98

H0: All groups have the same mean rating (2nd Option)

Ha: At least 1 group has a different mean rating. (3rd Option)

Numerator df = 2

Denominator df = 96

(c)

(b) Here k = 3. DFG = k - 1 = 3 - 1 = 2

N= 42. DFE = N - k = 42 - 3 = 39

DFT = N-1 = 42 - 1 = 41

H0: All groups have the same mean quiz scores (4th Option)

Ha: At least 1 group has a different mean quiz score. (2nd Option)

Numerator df = 2

Denominator df = 39

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