Someone plz help me....i need help this is due now

posted by .

A set of 50 data values has a mean of 27 and a variance of 16.
I. Find the standard score (z) for a data value = 19.
II. Find the probability of a data value < 19.
III. Find the probability of a data value > 19.

  • statistics help needed -

    The z-score is (19-16)/27 = +1/9 = 0.111
    P(z<0.111) = 0.544
    P(z>0.111) = 0.456
    There are table and online computational aids to give you the P(z) values for a normal distribution. The number 50 is not needed.

    There many be a more accurate way to do this using the probabilities of each integer data value, including 19.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. stats

    A set of 50 data values has a mean of 30 and a variance of 4. I. Find the standard score (z) for a data value = 26. II. Find the probability of a data value < 26. I think the first part is z=(26-30)/4 = -4/4 = -1. I am not sure …
  2. Statistics

    A set of 50 data values has a mean of 15 and a variance of 25. Find the standard score of a data value = 20
  3. Help plz!! Math....

    A set of 50 data values has a mean of 15 and a variance of 25. Find the standard score of a data value = 20
  4. Can someone help me please?

    A set of 50 data values has a mean of 15 and a variance of 25. Find the standard score of a data value = 20
  5. Stats

    A set of 50 data values has a mean of 15 and a variance of 36. Find the standard score of a data value = 30
  6. Statistics

    A set of 50 data values has a mean of 35 and a variance of 25. I. Find the standard score (z) for a data value = 26. II. Find the probability of a data value > 26.
  7. MATH

    A set of 50 data values has a mean of 18 and a variance of 4. I. Find the standard score (z) for a data value = 20. II. Find the probability of a data value < 20.
  8. Statistics

    A set of 50 data values has a mean of 27 and a variance of 16. I. Find the standard score (z) for a data value = 19. II. Find the probability of a data value < 19. III. Find the probability of a data value > 19. Show all work.
  9. statistics

    A set of 50 data values has a mean of 15 and a variance of 36. Find the standard score of a data value = 30
  10. Homework Help

    A set of 50 data values has a mean of 48 and a variance of 9. I. Find the standard score (z) for a data value = 43. II. Find the probability of a data value < 43.

More Similar Questions