Statistics

A random sample of 50 students chosen from an elementary school with 400 students was found to have a mean allowance of $26 per week with a standard deviation of $8. Obtain a 98% confidence interval for the total amount of allowance money given to students in this school per week.

  1. 0
  2. 3
asked by Cam
  1. 26-2.33*8/sqrt((50)), 26+ 2.33*8/sqrt((50)),

    = ( , ) ?

    1. 0
    posted by Kuai
  2. That's what I originally did but it's not one of the correct answers

    1. 0
    posted by Cam
  3. [ 23.37, 28.63]

    1. 0
    posted by Kuai
  4. $9,531 to $11,269


    $9,347 to $11,453


    $10,028 to $10,772


    $9,414 to $11,386

    Are my multiple choice

    1. 0
    posted by Cam
  5. mean 26(400) = $10400

    Standard deviation = 8(400) = 3200
    10400-+ 2.3263*3200/sqrt(50))


    [$9,347, 11,453]

    1. 0
    posted by Kuai
  6. Thank you so much !

    1. 0
    posted by Cam

Respond to this Question

First Name

Your Response

Similar Questions

  1. Probability

    A school survey found that 9 out of 10 students like pizza. If three students are chosen at random with replacement, what is the probability that all three students like pizza? Answer with 3 decimal places.
  2. probability

    A survey of 850 students conducted in two schools showed the following results: School A: *Students who took the bus = 400 * Students who did not take the bus = 150 Total = 550 School B: *Students who took the bus = 200 * Students
  3. Math

    In a random sample of 30 sixth graders, 9 had traveled outside of the United States. There are a total of 120 sixth graders in the school. Predict how many students have traveled outside of the United States. A 28 students B 36
  4. Statistics

    You want to know if there's a difference between the proportions of high school students and college students who read newspapers regularly. out of a random sample of 500 high-school students, 287 say they read newspapers
  5. statistics

    Professor Smith conducted a class exercise in which students ran a computer program to generate random samples from a population that had a mean of 50 and a standard deviation of 9mm. Each of Smith's students took a random sample
  6. MAth

    14% of students say they love school. If 8 students are chosen at random, what is the probability that at least one of them loves school?
  7. MAth

    14% of students say they love school. If 8 students are chosen at random, what is the probability that at least one of them loves school?
  8. math

    A high school guidance counselor conducts a survey to find the student's first choice for a college major and found that 65% of students choose math. If three students are chosen at a random, what is the probability that at least
  9. statistics

    The heights (in feet) of a sample of five randomly chosen students from School x are 6.3, 6.1, 5.7, 5.8, and 6.2. Determine a 90% confidence interval for the mean height of all students at School x
  10. Algebra 2

    A music teacher wants to determine the music performances of students. A survey of which group would produce a random sample. students in school band students attending the jazz concert students in every odd numbered homeroom

More Similar Questions