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3 years ago

NE

Mathematics

1 answer:

NISA [10]3 years ago

4 0

Answer:

Step-by-step explanation:

B.the constant

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Which of the following best describes term response variable

vova2212 [387]

Answer:

A Response Variable (or dependent variable) is that variable whose variation depends on other variables In short, the response variable is the subject of change within an experiment, often as a result of differences in the explanatory variables.

Step-by-step explanation:

5 0

3 years ago

Barron's reported that the average number of weeks an individual is unemployed is 17.5 weeks. Assume that for the population of

Olin [163]

Answer:

$P(16.5$

And using the normal standard table or excel we find the probability:

$P(-1.768< Z< 1.768) = P(Z$

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Solution to the problem

Let X the random variable that represent the avergae number of weeks an individual is unemployed of a population, and for this case we know the distribution for X is given by:

$X \sim N(17.5,4)$

Where $\mu=17.5$ and $\sigma=4$

Since the distribution for X is normal then, the distribution for the sample mean $\bar X$ is given by:

$\bar X \sim N(\mu= 17.5, \frac{\sigma}{\sqrt{n}}= \frac{4}{\sqrt{50}}=0.566)$

We select a sample of n =50 people. And we want to find the following probability

$P(16.5$

And using the normal standard table or excel we find the probability:

$P(-1.768< Z< 1.768) = P(Z$

4 0

4 years ago

In a recent year, a letter to Europe from the United States cost $0.94 to mail. A letter mailed within the United States costs $

Ilya [14]

Answer:

She mailed 3 to Europe

Step-by-step explanation:

0.94 x 3=2.82

0.44 x 2=0.88

2.82 + 0.88=3.70

8 0

3 years ago

Solve the problem below by finding a common denominator.<br><br> 23+12

zavuch27 [327]

Answer:

Step-by-step explanation:

23 + 12 = 35

= (20 + 10) + (3 + 2)

= 35

7 0

3 years ago

Read 2 more answers

I need help on b, the answer is 770 but I don't know how to work it out, please show your working:)

atroni [7]

The area of a rhombus is the product of the diagonals divided by 2. In this question, the diagonals are given, so that's really easy. Let's convert the measures to meters, that'll help for the final area calculation:

Area of one rhombus: (0.52x0.30)/2 = 0.078 m²

In 60 m², you can fit 60/0.078 tiles. That's 769.23, rounded to 770 since you'll have to cut up the last tile.

4 0

3 years ago