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2 years ago

What does a discrete quantitative variable mean?

Mathematics

1 answer:

andrey2020 [161]2 years ago

7 0

Answer:

A discrete quantitative variable is one that can only take specific numeric values (rather than any value in an interval)

Step-by-step explanation:

A discrete quantitative variable is one that can only take specific numeric values (rather than any value in an interval), but those numeric values have a clear quantitative interpretation. Examples of discrete quantitative variables are number of needle punctures, number of pregnancies and number of hospitalizations.

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A card is chosen at random from a standard deck of 52 playing cards. What is the probability that the card chosen is a queen?

Morgarella [4.7K]

Answer:

B) 1/13

Step-by-step explanation:

This is because as we all know there are four different category of cards - spades, clover, heart and diamond.

In each of these category we have 1 Queen so in total we have 4 Queens

Probability of choosing Queen = 4/52

= 1/13

(This is your answer hope it helps :))

5 0

3 years ago

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Calculate the time period of a pendulum if it completes 46 oscillations in 20 seconds.

Arada [10]

Answer:

0.44 seconds

Step-by-step explanation:

Time period is the time duration for completing one oscillation:

T = 20/46 ≈ 0.44 seconds

Answer is 0.44 seconds

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4 years ago

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5x²-4(x²+1) how to factorise this?

garri49 [273]

Answer:

(x+2)(x-2)

Step-by-step explanation:

We have ,

$\bf = 5x^2 -4(x^2+1)\\\\ \bf= 5x^2-4x^2-4 \\\\\bf= x^2 - 4 \\\\\bf =(x)^2-(2)^2 \qquad\bigg\lgroup \red{ \sf (a+b)(a-b)=a^2-b^2}\bigg\rgroup \\\\\boxed{\red{\bf=(x+2)(x-2)}}$

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3 years ago

Do the ratios 18 7 and 2 1 form a proportion?

deff fn [24]

Hi!

There are a few ways we can do this. The first one is this:

The ratios 18:7 and 2:1 can be represented as fractions: $\frac{18}{7}$ and $\frac{2}{1}$

To see if they are proportions, we can put the fractions in their simplest form and see if they are equal. However, they are already simplified, and we can see that they are not equal.

Therefore they are not proportions.

The second way we can see is to use cross products. Once again we'll put them as fractions, except we'll set them side by side, like so:

$\frac{18}{7}$ $\frac{2}{1}$

To see if they are proportions, we simply multiply the diagonals. These would be 18 x 1 and 7 x 2 which equals 18 and 14. These are not equal.

Therefore they are not proportions.

Hope this helps! Have a great day! Let me know if you need any other help :D

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2 years ago

What is the slope of the line that is parallel to y=3x-4

kipiarov [429]

Answer:

3 also could be said as 3/1

Step-by-step explanation:

6 0

3 years ago