How can you check that you have correctly convert frequencies to relative frequencies?

1 answer:

7 0

You could add up all the relative frequencies to make sure that you have 100% accounted for.

The relative frequency is the percent out of 100% for a particular item. If you have found the relative frequency for all items, it should equal 100%.

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HOw do I find proportions?

Rudiy27

Answer: A proportion is simply a statement that two ratios are equal.

Example: 2:6 = 1:3

To get that you do this: 2:6 ÷ 2:2 = 1:3

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Example 2: 5:10 = 1:2

To get that you do this: 5:10 ÷ 2:2 = 1:2

3 0

2 years ago

Suppose GRE Verbal scores are normally distributed with a mean of 461 and a standard deviation of 118. A university plans to rec

nirvana33 [79]

Answer:

The minimum score required for recruitment is 668.

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore 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 pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 461 \sigma = 118$