Statics

posted by .

Given the following frequency distribution, find the mean, variance, and standard deviation. Please show all of your work.
Class
Frequency

61-63
19

64-66
17

67-69
5

70-72
10

73-75
12

  • Statics -

    Use the midpoint of the intervals to determine values.

    Find the mean first = sum of scores/number of scores

    Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance.

    Standard deviation = square root of variance

    I'll let you do the calculations.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. statistics

    the following data represents the percentages of family income allocated to groceries for a sample of 50 shoppers: percentage of family income #of shoppers 10-19 6 20-29 14 30-39 16 40-49 11 50-59 3 1.calculate the value of mean 1.1 …
  2. statistics/mean and standard deviation

    find the mean and standard deviation in the following probability distribution x 1 2 3 p(x) 0.2 0.6 0.2 *i think that the mean is 2 but am lost after that when it comes to the standard deviation. please show work and calculations. …
  3. Stats

    Given the following frequency distribution, find the mean, variance, and standard deviation. Please show all of your work. Errors Frequency 51-53 9 54-56 19 57-59 16 60-62 24 63-65 25
  4. Stats.....plz help me.....

    Given the following frequency distribution, find the mean, variance, and standard deviation. Please show all of your work. Errors Frequency 51-53 9 54-56 19 57-59 16 60-62 24 63-65 25
  5. Please tell me if i did this correct

    Given the following frequency distribution, find the mean, variance, and standard deviation. Please show all of your work. Errors Frequency 51-53 9 54-56 19 57-59 16 60-62 24 63-65 25 This is what I got: Mean = 59.19 Variance = 1.43 …
  6. Math

    Given the following frequency distribution, find the mean, variance, and standard deviation. Class Frequency 31-33 18 34-36 25
  7. Math

    Given the following frequency distribution, find the mean, variance, and standard deviation. Class Frequency 31-33 18 34-36 25 37-39 22 40-42 9 43-45 20
  8. 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 deviation …
  9. statistics

    For an IQ test, we know the population mean = 100 and the standard deviation =16. We are interested in creating the sampling distribution when N = 64. (a) What does that sampling distribution of means show?
  10. Probabilities

    Can someone help me work this out. Find the a) mean, b)variance and c) standard deviation for the probability distribution below K Pr(X=k) 0 0.4 1 0.2 2 0.3 3 0.1 For mean I came up with 1.1 0(0.4)+1(0.2)+2(0.3)+3(0.1) For variance …

More Similar Questions