posted by .

If the average (xbar) on an assignment in a class was 82% with a standard deviation (s) of 4.8, what is the z-score for someone scoring 75% (round to the one hundredths place or two decimal places)?

  • Biostats -

    Z = (score-mean)/SD

    Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score.

  • Biostats -

    82-75= 7/4.8=1.45

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math ,correction

    is this right? Find the standard deviation to the given data. The manager of a small dry cleaner employs six people. As part of their personnel file, she asked each one to record to the nearest one-tenth of a mile the distance they
  2. math

    round result to two decimal places...the answer i have is: 7.023 so two decimal places would it be: 702.0 You're asked to round to two decimal places. 7.023 = 7.02. Your answer has only one decimal place. so i guess my answer is wrong …
  3. Algebra II

    Maria and Zoe are taking Biology 105 but are in different classes. Maria's class has an average of 78% with a standard deviation of 5% on the midterm, whereas Zoe's class has an average of 83% with a standard deviation of 12%. Assume …
  4. STATS

    In a certain store, there is a .05 probability that the scanned price in the bar code scanner will not match the advertised price. The cashier scans 820 items. a) What is the expected number of mismatches and standard deviation?
  5. Statistic

    A distribution has a standard deviation of รณ = 9.5. Find the z-score for a score above the mean by 4 points. note: round to 2 decimal places, and enter the value of the z-score but do not write "z = " in your answer
  6. statistics

    Suppose that you have just taken a test and earned a score of 90%. Your instructor informs the class that the grades were normally distributed, that the average was 75%, and the standard deviation was 12%. Calculate your z-score to …
  7. Stats

    Suppose that a random sample of adults has a mean score of on a standardized personality test, with a standard deviation of . (A higher score indicates a more personable participant.) If we assume that scores on this test are normally …
  8. Math

    Can someone answer a question similar to a and b so I can use as an example. Consider the following binomial random variables. (a) The number of tails seen in 47 tosses of a quarter. (i) Find the mean. (Give your answer correct to …
  9. college stats

    Again sorry for all the questions. please help, I am not good at stats and find these questions very difficult. I would appreciate an explanation if possible. 1.What is the sample average?
  10. Stats

    Suppose the following data are selected randomly from a population of normally distributed values. 42 51 43 48 41 57 54 39 45 48 45 39 46 Construct a 95% confidence interval to estimate the population mean. Round the intermediate values …

More Similar Questions