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ss7ja [257]
3 years ago
8

PLEASE HELP MEEEEE!!!!!

Mathematics
2 answers:
Scrat [10]3 years ago
8 0

Answer:

I think it might be d

Step-by-step explanation:

bogdanovich [222]3 years ago
6 0
The answer is D, if I’m correct :)
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The tail on Alex's dog is 5 1/4 inches long. This length is between which two inch marks on a ruler
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The mean annual inflation rate in the United States over the past 98 years is 3.37% and has a standard deviation of approximatel
Ksenya-84 [330]

Answer:

38.59% probability that inflation rate will be below 1.9% in 2019

Step-by-step explanation:

Problems of normally distributed samples are 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 = 3.37, \sigma = 5

If the annual inflation rate is normally distributed, what is the probability that inflation rate will be below 1.9% in 2019?

This is the pvalue of Z when X = 1.9. So

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

Z = \frac{1.9 - 3.37}{5}

Z = -0.29

Z = -0.29 has a pvalue of 0.3859

38.59% probability that inflation rate will be below 1.9% in 2019

4 0
3 years ago
¿Cómo se resuelve este problema? Con explicacion por favor.<br> El problema esta en el archivo
alexandr402 [8]

Answer:

?

Step-by-step explanation:

5 0
2 years ago
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