A statistic test has a mean of 78 and a standard deviation of 6. a) What is the z-score of a student who scored 89 on the test" b) What is the z-score of a student who scored 64 on the test c) What is the z-score of a student who scored 78 on the test

Lecture(10.1): The mean of the population is 50. The standard deviation is 10. (a) What is the probablity that a randomly  selected person from a population has a mean score between 50 and 75 ? (b) if a person Z score is 1.38. what is his raw score? (c) if a person has raw score of -.91. What is his raw score?.

The results of a common standardized test used in psychology research is designed so that the population mean is 165 and the standard deviation is 10. A subject earns a score of 138. What is the Z-score for this raw score? Z-score = Add Work

Assume that the distribution of a college entrance exam is normal with a mean of 500 and a standard deviation of 100. For each score below, find the equivalent Z score, the percentage of the area above the score, and the percentage of the area below the score. ( 3 each = total 6 points)   Score                                   Z score                  % Area Above             % Area Below   a) 437     b) 526

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Human body temperatures have a mean of 98.20°F and a standard deviation of 0.62°F. Convert 103.00°F to a z-score and determine if it is usual or unusual. Unusual means that the z-score is more than two standard deviation's below or above the mean. Show work please!

Ali scores 70 on Calculus-1 course with a class mean of 68 and a standard deviation of 2, and he scores 68 on Introduction to Operating with a class average of 60 and a standard deviation of 2. In which test did he perform well? Explain

A test score of 50.0 on a test having a mean of 69 and a standard deviation of 10. A) -1.9; not unusual B) -1.9; unusual C) 1.9; not unusual D) -19; unusual

The scores on a standardized test are normally distributed with a mean of 95 and standard deviation of 25. What test score is 0.3 standard deviations below the mean?

Reading comprehension scores for high school students in a school district are normally distributed with a mean of 85 and a standard deviation of 5. a) What percent have scores greater than 90? b)