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Sue scores 90, 85, and 83 on her first three math tests.
a. What is Sue's average?
b. If Sue scores 90 on the fourth test, what will her average be?
c. If Sue wants an average of 90, what score does she need on the fourth test?

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Karol A.
Karol A.Lv10
1 Apr 2021
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Related textbook solutions

Introductory Statistics
OER Edition, 2013
Openstax
ISBN: 9781938168208

Related questions

Suppose scores on an IQ test are normally distributed and suppose 20 people are randomly selected and tested. The standard deviation of the population is 15. What is the 90% confidence interval for the average test score in the sample group will be 110?

Ā 

For her calculus class, Marie has scored 88, 78, and 95 on three of her tests so far. What is the minimum score Marie needs to receive on her 4th test in order to have an average of 90?

Jean's scores on five mathematics tests were 98, 97. 99,98, and 96. Her scores on five English tests were 78, 84, 95, 72, and 69. Which statement is true about the standard deviations for the scores?

(a) The standard deviation for the English scores is greater than the standard deviation for the math scores.

(b) The standard deviation for the math scores is greater than the standard deviation for the English scores.

(c) The standard deviation for both sets of scores are equal

(d) More information is needed to determine the relationship between the standard deviations

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