Help plz!! Math....

posted by .

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

  • Help plz!! Math.... -

    Z = (score-mean)/SD

    SD^2 = variance

    Please only post your questions once. Repeating posts will not get a quicker response. In addition, it wastes our time looking over reposts that have already been answered in another post. Thank you.

  • Help plz!! Math.... -

    I apologize...thank you....so is it

    A data point of 20 is one standard deviation above the mean of 15, so the standard or "z" score is 1.0

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. Stats

    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. I'm not sure how to do this....please help
  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. Someone plz help me....i need help this is due now

    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.
  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