math

posted by .

Average truancy per student is 8 days per semester with a standard deviation 2.2 and a population of 250 students.

a. What percent of the population is truant more than 9 days?
b. What percent of the population is truant less than 3 days?
c. What percent of the population is truant between 5 and 10 days?
d. What percent of the population is truant between 8.5 and 10 days?
e. What raw score would produce a truancy percent of the top 15% of the students who missed the least amount of school?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Math

    According to a student project for statistics 250, the amount of money spent on texts per semester by the population of students at a small liberal arts college is normally distributed with a mean of $426 and a standard deviation of …
  2. Math please help!

    According to a student project for statistics 250, the amount of money spent on texts per semester by the population of students at a small liberal arts college is normally distributed with a mean of $426 and a standard deviation of …
  3. statistics

    School 1 Statistics: Average truancy per student is 8 days per semester with a standard deviation 2.2 and a population of 250 students. a. What percent of the population is truant more than 9 days?
  4. statistics

    A random sample of 31 people employed by the Florida state authority established they earned an average wage (including benefits) of $56 per hour. The sample standard deviation was $6.35 per hour. (a)What is your best estimate of the …
  5. math

    2. Suppose that people’s weights are normally distributed, with mean 175 pounds and a standard deviation of 6 pounds. Round to the nearest hundredth of a percent a. What percent of the population would weigh between 165 and 170 pounds?
  6. math

    Suppose that people’s weights are normally distributed, with mean 175 pounds and a standard deviation of 6 pounds. Round to the nearest hundredth of a percent a. What percent of the population would weigh between 165 and 170 pounds?
  7. college math

    Math homework please help!! 2. Suppose that people’s weights are normally distributed, with mean 175 pounds and a standard deviation of 6 pounds. Round to the nearest hundredth of a percent a. What percent of the population would …
  8. Algebra

    A population of insects increases at a rate of 1.5% per day. About how long will it take the population to double?
  9. Stats

    At a certain university, the average cost of books was $370 per student last semester and the population standard deviation was $80. This semester a sample of 45 students revealed an average cost of books of $390 per student. The Dean …
  10. calculus

    The population of a culture of bacteria, P(t), where t is time in days, is growing at a rate that is proportional to the population itself and the growth rate is 0.3. The initial population is 40. (1) What is the population after 30 …

More Similar Questions