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April 19, 2014

April 19, 2014

Posted by **ReeSha** on Thursday, July 7, 2011 at 2:44pm.

Grid E: x variable

14.51 14.88 35.23 17.10 24.87 6.74 13.77

21.17 11.18 13.77 35.60 28.20 11.55 7.85

Grid H: y variable

16.11 40.55 23.63 51.83 20.81 17.52 45.25

46.19 12.35 10.00 46.66 26.92 13.29 24.10

(a) Compute Óx, Óx2, Óy, Óy2. (Round your answers to two decimal places.)

Óx =__

Óx2 = ___

Óy = ___

Óy2 = ___

(b) Use the results of part (a) to compute the sample mean, variance, and standard deviation for x and for y. (Round your answers to two decimal places.)

Grid E: x =

s2 =

s =

Grid H: y =

s2 =

s =

(c) Compute a 75% Chebyshev interval around the mean for x values and also for y values. (Round your answers to two decimal places.)

Grid E:

11 to 12

Grid H:

13 to 14

- Statistics -
**PsyDAG**, Friday, July 8, 2011 at 7:15pmI cannot answer all your questions. I do not know what the "apple" symbol signifies.

b. For both x and y, add the scores and divide by n to find the mean. Subtract the mean from each score, and square each one. The sum of these squared differences = variance. The variance = s^2 = s squared, so standard deviation = square root of variance.

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