Question

1. a study of college students stated that 25 of all college students have at least one tattoo. in a random sample of 80 college students, let x be the number if students that have at least one tattoo. find the approximate probability that more than 30 of the sampled students had at least one tattoo. 2. Before a new phone system was installed, the amount a company spent on personal calls followed a normal distribution with an average of $900 per month and a standard deviation of $50 per month. Refer to such expenses as personal call expenses. using the distribution above, what is the probability that during a randomly selected month PCE were between $775.00 and $990.00? 3. A certain baseball player hits a home run in 5% of his at-bats as independent events. Find the probability that this baseball player hits at most 23 home runs in 700 at- bats? 4. A certain baseball player hits a home run in 6% of his at-bats as independent events. Find the probability that this baseball player hits at most 32 home runs in 750 at- bats? 5. The score on the Wechsler adult intelligence scale are approximately normal with mean= 100 and standard deviation is 15. The proportion of adults with scores above 110 is closest to?

          1. a study of college students stated that 25 of all college students have at least one tattoo. in a random sample of 80 college students, let x be the number if students that have at least one tattoo. find the approximate probability that more than 30 of the sampled students had at least one tattoo.
2. Before a new phone system was installed, the amount a company spent on personal calls followed a normal distribution with an average of $900 per month and a standard deviation of $50 per month. Refer to such expenses as personal call expenses. using the distribution above, what is the probability that during a randomly selected month PCE were between $775.00 and $990.00?
3. A certain baseball player hits a home run in 5% of his at-bats as independent events. Find the probability that this baseball player hits at most 23 home runs in 700 at- bats?
4. A certain baseball player hits a home run in 6% of his at-bats as independent events. Find the probability that this baseball player hits at most 32 home runs in 750 at- bats?
5. The score on the Wechsler adult intelligence scale are approximately normal with mean= 100 and standard deviation is 15. The proportion of adults with scores above 110 is closest to?

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