The mean of 4 test scores is 90. What is the sum of the scores?

Scores on a test are normally distributed with a mean of 68.2 and a standard deviation of 10.4. Esti...

Scores on a test have a mean of 66 and Q3 of 81. The scores have a distribution that is approximatel...

the scores on a 100 pt test are normally distributed with a mean of 80 and a standard deviation of 6...

below is the test scores for students in a statistics class.80,65,79,83,60,79,90,77,84,93.the profes...

The mean of three test scores is 74. What must a fourth test score be to increase the mean to 78?

Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of...

Of 25 test scores, there are 15 scores less than or equal to 85. What is the percentile rank of a te...

Test Scores 5 6 7 8 9 Frequency 4 2 3 5 6 ( iii ) Write down the mode....

Scores on a certain IQ test are known to have a mean of . A random sample of 100 students attend a...

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