Suppose the group of 45 women vary approximately according to a normal distribution with mean BMI (kg/m2) of 29.5 and a standard deviation of 1.6 kg/m2 after 1 year and the 2 goal BMI was 28.5 kg/m. State your null and alternative hypotheses, and interpret your pvalue, using alpha .05.
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Suppose a researcher is interested in investigating the effectiveness of a new diet plan at reducing BMI among a group of women with similar baseline weights after 1 year. Suppose the group of 45 women vary approximately according to a
State your null and alternative hypotheses, and interpret your pvalue, using alpha .05.
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- Suppose that a Normal model describes furl economy (mile per gallon) for automobile and that a Saturn has a standardized score ( z score) of +2.2. This meatn taht Satturn.... gets 2.2 miler sper gallon. get 2.2 times the gas mileage of the avereage car. get 2.2 mpg more than the average car. have a standard deviation of 2.2 mpg achieve fuel eceonomy that is 2.2 standard deviations better thean the average car.The average age at which adolescent girls reach their adult height is 16 years. Suppose you have a sample of 29 adolescent girls who are developmentally delayed, and who have an average age at which they reached their adult height of 17.8 years and a sample variance of 77.4 years. You want to test the hypothesis that adolescent girls who are developmentally delayed have a different age at which they reached their adult height than all adolescent girls. In order to calculate the t statistic, you first need to calculate the estimated standard error. 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