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Which of these settings does not allow use uf a matched pairs t-test? OYou interview both the husband and the wive in 64 married couples and ask each about their ideal number of children. You interview a sample of 64 unmarried male students and another sample of 64 unmarried female students and ask each about their ideal number of children. You interview 64 female students in their freshman year and again in their senior year and ask each about their ideal number of children.

A total of 47 participants had two cell phones put on their ears and then had their brain glucose metabolism (a measure of brain activity) measured under two conditions: with one cell phone turned on for 50 min (the on condition) and with both cell phones off (the off condition). The difference in brain glucose metabolism rate (in umol/100g) in the on condition minus the off condition was computed for each participant. The mean of the difference was 2.4 with a standard deviation of 6.3. Which is the correct result and interpretation? OReject the null hypothesis that metabolism rate is the same under both conditions Accept the alternative hypothesis that metabolism rate is lower in the on condition Retain the null hypothesis that metabolism rate is the same under both conditions This cannot be determined, not enough information is given.

math   Statistics-And-Probability   
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Answer #1

1)correct option is: you interview a sample of 64 unmarried male students and another sample of 64 unmarried female students............

2)

here test statistic t =dbar*sqrt(n)/std deviation=2.4*sqrt(47)/6.3=2.61

as test statistic is in critical region ; correct option is:

reject the null hypothesis that ..rate is the same under both conditions,

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