Solve the Problem. -Michael Gets Test Grades of 75, 79, 82, and 87

question 150

Multiple Choice

Solve the problem.
-Michael gets test grades of 75, 79, 82, and 87. He gets a 88 on her final exam. Find the weighted mean if the tests each count for 15% and the final exam counts for 40% of the final grade. Round to one decimal place.

• A) 83.7
• B) 82.2
• C) -77.8
• D) 245.2

---

Definitions:

Sample Value

A single measurement or observation from a larger set of data collected from a population.

Significant Difference

A statistical measure indicating that the observed differences between two or more groups are not likely due to chance.

Standard Error

An estimate of the standard deviation of the sampling distribution of a statistic, often used in inferential statistics.

Sample Size

The number of observations or data points collected in a sample, which can influence the reliability and validity of statistical analyses.