4th Quarter Examination: Statistics and Probability

It is an original datum that has not been transformed.

• Data

• Raw score

• Data raw

• Standard score

The normal random variable X = 100 in the given mean µ = 85 and standard deviation σ = 8 of a population in the Statistics test. What is the probability of scores that lies above 100?

• 4.01%

• 2.01%

• 5.01%

• 3.01%

It is a region under the normal curve. Refer to the values on table of Z-Score.

• Area of Normal Curve

• Z-Scores

• Empirical Rule

• Probability of Normal Curve

Find the z-score value that corresponds to a normal random variable X = 100 in the given mean µ = 85 and standard deviation σ = 8 of a population in Statistics test.

• 1.85

• 1.86

• 1.87

• 1.88

Find the area to the left of z = 1.53.

• .7039

• .3970

• .9370

• .7093

A normally distributed population of test scores has a mean of 80 and a standard deviation of 2.5. Find the percentage of scores that lies below 75.

• 1.39%

• 2.28%

• 1.79%

• 2.87%

Find the raw score X for given the sample mean x = 135, and sample standard deviation s = 30, and z = -2.

• 55

• 65

• 75

• 85

Find the area between z-scores of -0.75 and 1.21.

• 0.6603

• 0.3606

• 0.3066

• 0.6306

The average speed of vehicles traveling on a stretch of highway is 67 miles per hour with a standard deviation of 3.5 miles per hour. A vehicle is selected at random. What is the value of the miles per hour associated with a z-score of 3?

• 63.5

• 74

• 70.5

• 77.5

The speed of vehicles traveling on a stretch of highway is 67 miles per hour with a standard deviation of 3.5 miles per hour. A vehicle is selected at random with a z-score 1.23. What is the mean?

• 63

• 67

• 70

• 73