Wwhat is the new sweet policy? The number of updates students have simply decreased each week if the rate rate remains the same how many students can expected to be later during week eight
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Adi S.
A survey conducted in a college intro stats class during Autumn 2003 asked students about the number of credit hours they were taking that quarter. The number of credit hours for a random sample of 16 students is: 10, 10, 12, 14, 15, 15, 15, 15, 17, 17, 19, 20, 20, 20, 20, 22. Suppose that the students taking 10 credit hours in the data set were actually taking 9 credit hours instead of 10 (so we would replace both 10s in the data set with 9s). Indicate whether changing the number of credit hours for that student would make each of the following summary statistics increase, decrease, or stay about the same. Range Standard deviation Mean Median Interquartile range 1. Increase 2. Decrease 3. Stay about the same
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Jessie says that she feels that the average number of pigs per litter has changed in the last couple of years. It used to be that she had an average of 9.8 per litter. She samples the next 50 litters and finds an average of 10.2 with a standard deviation of 0.68. At alpha 0.05, can she say that the number per litter has changed significantly? The math teacher believes that the average time kids spend working on homework has decreased significantly over the years. It used to be that they would spend 50 minutes per night on homework. He samples 30 of his current students and finds that they spend an average of 45 minutes with a standard deviation of 19 minutes. Does this back up his assumption?
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