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I need help with this math word problem for my class.

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Apr 10th, 2015

StatDisk output:

Sample size, n:     11

Degrees of freedom: 9

Correlation Results:

Correlation coeff, r: -0.9132944   --answer for a)

Critical r:           ±0.6020684

P-value (two-tailed): 0.00009

Regression Results:

Y= b0 + b1x:

Y Intercept, b0:      55.62124     -----b) Y=55.62124-.5539044x

Slope, b1:            -0.5539044

Total Variation:       1890.182

Explained Variation:   1576.613

Unexplained Variation: 313.5685

Standard Error:        5.902622

Coeff of Det, R^2:     0.8341067

c) substitute x=60 to the equation Y=55.62124-.5539044x


Apr 11th, 2015

Thank you!

Apr 11th, 2015

Use the fact that the mean of a geometric distribution is μ = 1/p and the variance is σ2 = q/p2.

A company assumes that 0.5% of the paychecks for a year were calculated incorrectly. The company has 200 employees that examines the payroll records from one month.

  • Find the mean, variance, and standard deviation.
  • How many employees payroll records would you expect to examine before finding one with an error?

Jun 28th, 2015

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