On a standard measure of hearing ability, the mean is 300 and the standard deviation is 20. Give the Z scores for persons who score (a) 340, (b) 310, and (c) 260. Give the raw scores for persons whose Z scores on this test are (d) 2.4, (e) 1.5, (f) 0, and (g) –4.5.

  1. 👍 0
  2. 👎 0
  3. 👁 84
  1. z = (value - mean)/SD

    I'll do one of each type. It requires only algebra once you have the equation.

    a. z = (340 - 300)/20
    z = 2

    d. 2.4 = (value - 300)/20
    48 = value - 300
    value = 348

    1. 👍 0
    2. 👎 0
    posted by Marth

Respond to this Question

First Name

Your Response

Similar Questions

  1. Statistics

    I have a couple questions I answer for home work could some look atthem and tell me If I am doing them right I also am having problems understanding the variance and standard deviation are the site you can suggest that would help

    asked by KEENE on February 6, 2009
  2. Algebra

    Use a calculator to find the mean and standard deviation of the data. Round to the nearest tenth. 6,7,19,7,18,7 A. mean = 9; standard deviation = 26.4 B. mean = 11.9; standard deviation = 26.4 C. mean = 10.6; standard deviation =

    asked by Veronika on February 18, 2016
  3. Advanced Functions

    1. Find the following quantities by hand (except for the standard deviation) Check your results with your calculator: a. Minimum b. Lower Quartile c. Median d. Upper Quartile e. Maximum f. Range g. Mean h. Mode i. Standard

    asked by Anonymous on May 2, 2011
  4. Statistics

    A college statistics class conducted a survey of how students spend their money. They asked 25 students to estimate how much money they typically spend each week on fast food. They determined that the mean amount spent on fast

    asked by sam on October 14, 2016
  5. Statistics

    1) A Motor Company has purchased steel parts from a supplier for several years and has found that 10% of the parts must be returned because they are defective. An order of 25 parts is received. What are the mean and standard

    asked by BEARHUG on February 15, 2009
  6. Math

    Describe a scenario where you expect a set of data to have A.) a large standard deviation B.) a small standard deviation The prize for winning a contest can be chosen from category a or category b. Prizes from category a have a

    asked by Jenny on June 19, 2016
  7. statistics--need formula for the following

    stuck on steps 2 and 4 of hypothesis testing. Need a formula to complete. please help... A researcher theorized that people can hear better when they have just eaten a large meal. Six individuals were randomly assigned to eat

    asked by unknown on April 17, 2011
  8. Math

    Roughly speaking, the standard deviation indicates how far, on average, the observations are from the mean. Do you think that for the data set below the standard deviation will give a good indication of the typical deviation from

    asked by Lyndse on February 21, 2010
  9. Statistics

    data from sample of 400 cases, variable has 95% confidence interval of 54.3 to 54.7 I found the mean- how do i find standard error- step by step please. Standard error = sd/√n Note: sd = standard deviation; n = sample size.

    asked by Angel on April 10, 2007
  10. math

    Using the data in the table, calculate the mean, range, variance, and standard deviation, and then answer questions e and f. Round the variance and standard deviation to one decimal place. a. Mean b. Range c. Variance d. Standard

    asked by Anonymous on November 10, 2013

More Similar Questions