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3 years ago

Solve pls brainliest

Mathematics

2 answers:

grigory [225]3 years ago

7 0

Answer:

$\frac{2}{12}$

Step-by-step explanation:

3/12- 1/12=2/12

IRINA_888 [86]3 years ago

7 0

Answer:

1/6 for complete answer. see below for explained answer.

Step-by-step explanation:

$\frac{1}{4} -\frac{1}{12}$

$\frac{3}{12}-\frac{1}{12}$

$\frac{3-1}{12}$

$\frac{2}{12}$

$\frac{1}{6}$

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Read 2 more answers

A livestock company reports that the mean weight of a group of young steers is 1143 pounds with a standard deviation of 88 pound

malfutka [58]

Answer:

a) P(x<1200)=74.14%

b) P(1100<X<1250)=57.54%

Step-by-step explanation:

Normal Distribution

The normal distribution, also known as the bell curve, is a distribution that occurs naturally in many situations of life. We use the model $N(\mu,\sigma)$ to understand the behavior of some real-life variables. Where $\mu$ is the mean value and $\sigma$ is the standard deviation.

In our case, we have

$\mu=1143,\ \sigma=88$

And are required to find the percentage of steers whose weigh lie within a given range. We must use some sort of table or digital means to compute the values because the normal distribution cannot be calculated directly by a formula. We use the NORMDIST (or NORM.DIST) formula for Excel which gives us the left tail of the area behind the bell curve, i.e. the cumulative percentage for a give value of X. The formula has the form

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a) X<1200

The formula is used with the following parameters

NORM.DIST(1200,1143,88,true)

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$P(X$

b) We need to compute P(1100<X<1250). To do this, we calculate both left tails and the subtract them

NORM.DIST(1100,1143,88,true)=0.3125

NORM.DIST(1250,1143,88,true)=0.8880

$P(1100$

$\boxed{P(1100$

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