Please help and explain how you got the answer I'm really bad at these

2 answers:

6 0

The range of the data is C. 160 because the biggest number, 280, subtracted by the smallest number, 120, is equal to 160.

swat322 years ago

6 0

Here, Median of Q1 = 140+150/2 = 290/2 = 145
Median of Q3 = 226+245/2 = 471/2 = 235.5

Now, Interquartile range = 235.5 - 145 = 90.5

In short, Your Answer would be Option B

Hope this helps!

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Step-by-step explanation:

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Answer:

The z-score when x=187 is 2.41. The mean is 187. This z-score tells you that x = 187 is 2.41 standard deviations above the mean.

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 question:

$\mu = 152, \sigma = 14.5$