The​ "Freshman 15" refers to the belief that college students gain 15 lb​ (or 6.8​ kg) during their freshman year. Listed in the accompanying table are weights​ (kg) of randomly selected male college freshmen. The weights were measured in September and later in April. Use the listed paired sample​ data, and assume that the samples are simple random samples and that the differences have a distribution that is approximately normal. September 93 68 73 71 67 68 74 74 49   April 88 68 75 77 66 69 77 69 50   a. Identify the test statistic. t=?

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The​ "Freshman 15" refers to the belief that college students gain 15 lb​ (or 6.8​ kg) during their freshman year. Listed in the accompanying table are weights​ (kg) of randomly selected male college freshmen. The weights were measured in September and later in April. Use the listed paired sample​ data, and assume that the samples are simple random samples and that the differences have a distribution that is approximately normal.

September 93 68 73 71 67 68 74 74 49
 
April 88 68 75 77 66 69 77 69 50

 

a. Identify the test statistic.
t=?

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