1)

A z-score is

Question options:

A the probability under a normal distribution.

B the number of standard deviations a measured value is away from its mean

C none of the two choices.

2)

A computer's random number generator is set to produce any real number between 30 and 90; those numbers are defined by the variable X. The distribution of the variable X is uniform (uniform distribution). What proportion of times would a number appear between 38 and 45?

Either write your answer as a non-reduced fraction or as adecimal rounded to four decimal places.

Don't enter the answer as a percentage, that is, enter 0.3245 not 32.45%.

3)

Consider the three normal probability (quantile) plots. Which graph indicates that the distribution of the data is possibly normal?

Question options:

Data Normal Probability Plot A Normal Probability Plot B NormalProbahility Plot C Expeded Zsoore Expected Isoom I 95 s 99 as. O 5 W O 55 u . 0 Be 55. so? 5 . .0 i A g 4-5. .. . W . 2.. m 0 ta 1 a . .3 . . J . o ' o H 25" 59 2 1 u 1 2 2 1 u 1 2 -3 -2 -1 o 1 Expected 24mm