Confidence interval of the mean score
The average score for 49 teenage boys playing a certain computer game was 75,000 points per player. If the standard deviation of the population is 20,000 points, find the 99% confidence interval of the mean score for all teenage boys.
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Carry out a hypothesis test to determine if the sample provides convincing evidence that the mean number of calories in a New York City hamburger chain lunchtime purchase is greater than the lunch recommendation of 750 calories.
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Change the last number from 1.53 to 50 and recalculate the confidence interval. Using the results, describe the effect of an outlier or extreme value on the confidence interval.
An aqueous solution is prepared by diluting 3.30 mL acetone,CH3COCH3, (d=0.789 g/ mL) with water to final volume of 75.0 mL. The density of the solutionis 0.993 g/mL.
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