What is the value of Sum(X-1) of the following scores? 2, 4, 7

Z-scores and standardized scores

Are standardized scroes and z-scores the same thing?

Yes

No

Consider the following distribution of scores with mean 90 and standard deviation 30. Fill in the boxes beneath the line labeled "z" with the z-scores corresponding to each position in the distributic.

Suppose you alos want to standardize these scores to a "k" scale where the mean of k is 100  and the standeard deviation is 15. Fill in the boxes beneath the line labeled "k" with the k-scores corresponding to each positivon in the distribution.

GMAT Exam Scores. The Graduate Management Admission Test (GMAT) is a standardized exam used by many universities as part of the assessment for admission to graduate study in business.

The average GMAT score is 547 (Magoosh website). Assume that GMAT scores are bell-shaped with a standard deviation of 100. 

a. What percentage of GMAT scores are 647 or higher?

b. What percentage of GMAT scores are 747 or higher?

c. What percentage of GMAT scores are between 447 and 547? 

d. What percentage of GMAT scores are between 347 and 647.

GMAT Exam Scores. The Graduate Management Admission Test (GMAT) is a standardized exam used by many universities as part of the assessment for admission to graduate study in business.

The average GMAT score is 547 (Magoosh website). Assume that GMAT scores are bell-shaped with a standard deviation of 100. 

a. What percentage of GMAT scores are 647 or higher?

b. What percentage of GMAT scores are 747 or higher?

c. What percentage of GMAT scores are between 447 and 547? 

d. What percentage of GMAT scores are between 347 and 647.