When will the

Mathematics

1 answer:

yarga [219]3 years ago

7 0

Answer:

see the procedure

Step-by-step explanation:

we know that

When in a quotient of two fractions that are less than 1 , the numerator fraction is greater than the denominator fraction, then the result will always be greater than either of the two fractions.

Example

we have the quotient a/b

where

$a=\frac{1}{2}$

$b=\frac{1}{4}$

In this problem

a > b -----> the numerator is greater than the denominator

$\frac{a}{b}=\frac{1}{2}:\frac{1}{4}=\frac{4}{2}=2$

$2 > \frac{1}{2}\\\\2 > \frac{1}{4}$

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For a medical study, a researcher wishes to select people in the middle 60% of the population based on blood pressure.

Finger [1]

Answer:

Lower limit: 113.28

Upper limit: 126.72

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:

$\mu = 120, \sigma = 8$