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natulia [17]
2 years ago
10

Asa received scores of 72, 97, and 82 on her last three math tests. She needs a mean test score of 82 to qualify for the math te

am. What is the first step in determining how many points she needs on her next test to qualify for the team?
Find the sum of all the numbers in the problem, 72 + 97 + 82 + 82.
Find the average score for the three tests that Asa has taken.
Determine the total number of points that she needs on the last test.
Determine how many total points are needed to have an average of 82
Mathematics
1 answer:
Stels [109]2 years ago
5 0

Answer:Average score for 3 tests is 83.67

Step-by-step explanation:sorry if im wrong

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A set of data items is normally distributed with a mean of 400 and a standard deviation of 60. Find the data item in this distri
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Answer:

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Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

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This means that \mu = 400, \sigma = 60

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