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WGU Applied Probability and Statistics (FZO1 C955) Sample Questions:

1. The average lifespan of a dalmatian is 11.5 years, with a standard deviation of 1.5 years.
What are the two values between which 95% of the data falls for the average lifespan of a dalmatian, assuming a normal distribution?

A) 9.5 years and 13.5 years
B) 9.0 years and 14.0 years
C) 10.0 years and 13.0 years
D) 8.5 years and 14.5 years

2. Chi-square test used for:

A) Means of two samples
B) Regression
C) Variance
D) Association of categorical variables

3. Standard error decreases when:

A) Mean increases
B) SD increases
C) Sample size decreases
D) Sample size increases

4. Regression slope indicates:

A) Correlation
B) Change in Y per unit X
C) Intercept
D) R²

5. Sample mean = best point estimate of population mean?

A) Only for categorical data
B) False
C) Only when the sample size is 1
D) True

Solutions: