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A health researcher read that a 200-pound male can burn an average of 524 calories per hour playing tennis. 37 males were randomly selected and the mean number of calories burned per hour playing squash was 534.8 with a standard deviation of 45.9 calories. Do squash players burn more calories per hour than tennis players? Test with alpha = 0.01.
The mean statistic test scores is 64 and the standard deviation is 6.0. For the biology test scores, the mean is 25 and the standard deviation is
a quality engineer is monitoring a lens coating process where a lens is either a high quality lens or not a high
the mean score on a physical fitness test for division i student-athletes is 947 with a standard deviation of 205. if
the percentage of alcohol in a certain compound may be considered as a random variable x with the following pdffx x
although airline schedules and cost are important factors for business travelers when choosing an airline carrier a usa
A particular fast food restaurant is located near a University. 40% of the customers are students. Students prefer the spicier items.
JBGHI demands a sample large enough to ensure an error of ± 2% with 90% confidence. What is the necessary sample size?
a research study showed that 50 of workers change jobs within 2 years of employment. landy r. took a random sample of
Based on the information in part (a), what decision should the director make about the books used for the courses if the goal is to keep the cost below $300?
questionpart a you have been offered the choice of 3 prizesprize 1 15000 cash payable immediatelyprize 2 2 yearly
the following table gives the probabilities gives the number of police officers who will call in sick daily for a large
Problems on Sampling Variability and Standard Error and Confidence Intervals
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