Read the statement shown below.

Mathematics

2 answers:

natta225 [31]3 years ago

6 0

Answer:

I also agree,

B. If Amy is not in Grade 9, then Jessica is not in Grade 8.

Nat2105 [25]3 years ago

5 0

B is the only reasonable answer, because Amy is only in grade 9 when Jessica is in grade 8.

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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.

Mean of 6.6-in and a standard deviation of 1.1-in.

This means that $\mu = 6.6, \sigma = 1.1$