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Ne4ueva [31]
4 years ago
11

Determine whether the random variable is discrete or continuous. In each​ case, state the possible values of the random variable

. ​(a) The number of people with blood type Upper A in a random sample of 27 people. ​(b) The square footage of a house. ​(a) Is the number of people with blood type Upper A in a random sample of 27 people discrete or​ continuous
Mathematics
1 answer:
xeze [42]4 years ago
5 0

Answer:

a) Discrete. Values 0,1,2,3,...,27

b) Continuous. Can be any real positive value.

Step-by-step explanation:

A random variable is discrete if it's values are natural, counting values. That is 0,1,2,3,4 etc

A random variable is continuous if it's values are real numbers, decimal. For example, 1, 2, 0.5, 0.22, etc.

(a) The number of people with blood type Upper A in a random sample of 27 people.

You cannot have 1.5 people with blood type Upper A, for example.

You can have 0,1,2,3,...,27.

This random variable is discrete.

​(b) The square footage of a house.

This square footage can be any real positive value, so it is continuous.

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A successful basketball player has a height of 6 feet 5 inches, or 196 cm. Based on statistics from a data set, his height conve
SVETLANKA909090 [29]

Answer:

The player's height is 3.02 standard deviations above the mean.

Step-by-step explanation:

Consider a random variable <em>X</em> following a Normal distribution with parameter <em>μ</em> and <em>σ</em>.

The procedure of standardization transforms individual scores to standard scores for which we know the percentiles (if the data are normally distributed).  

Standardization does this by transforming individual scores from different normal distributions to a common normal distribution with a known mean, standard deviation, and percentiles.

A standardized score is the number of standard deviations an observation or data point is above or below the mean.

The standard score of the random variable <em>X</em> is:

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

These standard scores are also known as <em>z</em>-scores and they follow a Standard normal distribution, i.e. <em>N</em> (0, 1).

It is provided that the height of a successful basketball player is 196 cm.

The standard value of this height is, <em>z</em> = 3.02.

The <em>z</em>-score of 3.02 implies that the player's height is 3.02 standard deviations above the mean.

3 0
3 years ago
For #45 I got -2xy+4y would that be choice b? Help please!
Slav-nsk [51]

6y-2y(x+1)

6y-2xy-2y

Combine like terms

4y-2xy which is as the same as -2xy+4y, which means that it is choice B and you are correct

6 0
4 years ago
Read 2 more answers
DB _____ RT Choose the relationship symbol to make a true statement. <br> &gt; <br> =
Nikitich [7]
DB = RT
We know this to be true because both have one “tally” mark indicating that they are congruent (same)
8 0
3 years ago
Find the value of X<br>​
arsen [322]

Answer:

x = 118

Step-by-step explanation:

1. All the angles in a pentagon add up to 540, so to find the value of x, we can use this equation x + 122 + 103 + 98 + 99 = 540.

2. (Solving)

Step One: Simplify both sides of the equation by adding like terms.

  • (x) + (122 + 103 + 98 + 99) = 540
  • x + 422 = 540

Step Two: Subtract 422 from both sides.

  • x + 422 - 422 = 540 - 422
  • x = 18
8 0
3 years ago
Which answer is a factored form of the expression below?
katrin2010 [14]

Answer:

c: is the answer 2 (3 x + 4) (x + 2)

Step-by-step explanation:

Factor the following:

6 x^2 + 20 x + 16

Factor 2 out of 6 x^2 + 20 x + 16:

2 (3 x^2 + 10 x + 8)

Factor the quadratic 3 x^2 + 10 x + 8. The coefficient of x^2 is 3 and the constant term is 8. The product of 3 and 8 is 24. The factors of 24 which sum to 10 are 4 and 6. So 3 x^2 + 10 x + 8 = 3 x^2 + 6 x + 4 x + 8 = 2 (3 x + 4) + x (3 x + 4):

2 2 (3 x + 4) + x (3 x + 4)

Factor 3 x + 4 from 2 (3 x + 4) + x (3 x + 4):

Answer:  2 (3 x + 4) (x + 2)

4 0
4 years ago
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