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Drupady [299]
3 years ago
13

The most commonly used descriptive statistics for a set of numerical scores are the mean and the ____.

Mathematics
1 answer:
nasty-shy [4]3 years ago
8 0

Answer: Standard Deviation.

Step-by-step explanation:

DescriptionIn insights, the standard deviation is a proportion of the measure of variety or scattering of a lot of qualities. A low standard deviation demonstrates that the qualities will in general be near the mean of the set, while an elevated expectation deviation shows that the qualities are spread out over a more extensive territory.

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What is the probability of drawing a diamond from a standard deck of cards on a second draw, given that a diamond was drawn on t
Charra [1.4K]
This problem is all about probability. It is the study of predicting the likelihood or chances of a certain event to happen out of all the possibilities. It is always expressed as a part of a whole. Therefore, the answer is either in fraction or in percentage. 

A standard deck of card consists of 52 cards all in all. There are 13 diamond cards within the deck. So, the probability of getting a diamond card is 1/52. But we are given with a conditional probability. The first draw is sure to pick a diamond. So, the probability for this is 1 or 100%. But we should multiply this to the second scenario which is the 2nd draw. If you picked a card already, that means the total number of cards is 52 less 1. Also, because you already picked a diamond in the first draw, the diamond cards left in the deck is 13 less 1. Therefore, the probability of getting a diamond card in the second draw is

Probability = 1 × 12/51
Probability = 12/51
7 0
3 years ago
PLZ HELP Find the value of x that makes ΔXYZ~PQR
Galina-37 [17]

Answer:

x = 8

Step-by-step explanation:

\triangle XYZ \sim\triangle PQR... (GIVEN) \\\therefore \frac{XY}{PQ} = \frac{YZ}{QR}.. (csst) \\\therefore \frac{20}{30}= \frac{x+6}{21}\\\therefore \frac{2}{3}= \frac{x+6}{21}\\\therefore \frac{2\times 21}{3}= {x+6}\\\therefore 14= {x+6}\\\therefore 14-6= {x}\\\therefore 8= {x}\\\huge \orange{\boxed {\therefore x = 8}}

6 0
4 years ago
30 PTS<br><br> a. 59<br> b. 36.9<br> c. 53.1<br> d. 30.1
poizon [28]

Answer:

c)

Step-by-step explanation:

8 0
3 years ago
What if the 360 cubic-inch paving stones are 4 inches thick and any whole number length and width are possible? How many differe
AleksAgata [21]
Umm im gonna guess on this one because im not good at math lol
, 3.58?
6 0
4 years ago
Read 2 more answers
Two train whistles have identical frequencies of 180 Hz. When one train is at rest in the station, sounding its whistle, a beat
alexgriva [62]

Answer:

7 m/s

Step-by-step explanation:

We are given that

Frequency at stationary =f_0=180Hz

Beat frequency=3.7 Hz

Apparent frequency=f=180+3.7=183.7Hz

Speed of sound=v=345 m/s

We have to find the speed of train

Apparent frequency=f=f_0(\frac{v}{v-v_s})

Substitute the values then we get

183.7=180(\frac{345}{345-v_s})

345-v_s=\frac{180\times 345}{183.7}

345-v_s=338

v_s=345-338=7 m/s

Hence, the speed of train=7 m/s

5 0
4 years ago
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