Find the specified probability from a table of Normal probabilities 5

Find the specified probability from a table of normal

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Find the specified probability, from a table of Normal probabilities.5)Researchers believe that 6% of children have a gene that may be linked toa certain childhood disease. In an effort to track 50 of these children,researchers test 950 newborns for the presence of this gene. What is theprobability that they find enough subjects for their study?6)Researchers believe that 8% of children have a gene that may be linked toa certain childhood disease. In an effort to track 50 of these children,researchers test 950 newborns for the presence of this gene. What is theprobability that they do not find enough subjects for their study?Describe the indicated sampling distribution model.7)Some real estate specialists estimate that the length of time people live in ahouse has a mean of 7 years and a standard deviation of 2 years. A randomsample of 300 families was chosen and surveyed. Let yrepresent the meannumber of years that those families had lived in their house. Describe thesampling distribution model of this mean.8)Automatic teller machine receipts show that customer withdrawals have askewed distribution with a mean of $54 and a standard deviation of $20.Let yrepresent the mean withdrawal for the next 200 customers at themachine. Describe the sampling distribution model of this mean. 2
Find the specified probability, from a table of Normal probabilities.9)The weight of crackers in a box is stated to be 16 ounces. The amount thatthe packaging machine puts in the boxes is believed to have a Normalmodel with mean 16.15 ounces and standard deviation 0.3 ounces. What isthe probability that the mean weight of a 25-box case of crackers is below16 ounces?10)The weight of crackers in a box is stated to be 16 ounces. The amount thatthe packaging machine puts in the boxes is believed to have a Normalmodel with mean 16.15 ounces and standard deviation 0.3 ounces. What isthe probability that the mean weight of a 50-

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