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Karolina [17]
3 years ago
6

A set of data with a mean of 45 and a standard deviation of 8.3 is normally distributed. Find the value that is –1 standard devi

ation away from the mean.
Mathematics
2 answers:
morpeh [17]3 years ago
7 0

Answer:

36.7

Step-by-step explanation:

If the value is −1 standard deviation from the mean, the z-score is −1.

−1−8.336.7===x1−458.3x1−45x1

The value 36.7 is −1 standard deviation from the mean.

vovikov84 [41]3 years ago
3 0

One standard deviation below the mean is 36.7

One standard deviation above to mean is 53.3


Idk which one your looking for

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A card is drawn from a​ well-shuffled deck of 52 cards. Find the probability of drawing a diamond or a spade.
AveGali [126]

Answer:

2/13

Step-by-step explanation:

For a deck of card

Total cards = 52

Total spade = 4

Total diamond = 4

pr(drawing a spade) = number of spade/total cards

pr(drawing a spade) = 4/52 = 1/13

pr(drawing a diamond)  = 4/52 = 1/13

Pr(diamond or a spade) = 1/13 + 1/13 = 2/13

8 0
3 years ago
What number must be added to the expression below to complete the square? X^2+5x
Leno4ka [110]

Answer:

25/4

Step-by-step explanation:

x^2 +5x

To complete the square we take (b/2)^2

b =5

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25/4

7 0
3 years ago
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Answer:

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Step-by-step explanation:

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2 years ago
A standard number cube is tossed. Find the following probability. ​P(greater than 4 or odd​)
lorasvet [3.4K]
A standard cube has 6 possible outcomes. But since we want to find P(4+ or odd), the outcomes become more narrow.
So:
6 outcomes -> 1, 2, 3, 4, 5, 6

But we want to find 4+
So:
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We also want to find all odd possibilities.
So:
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As you can see, there is a 5 in both the 4+ and the odd numbers so 5 will only be counted once.
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So the probability of having an outcome that is P(4+ or odd) is:
5/6 or 0.8333 or 83.33%

Hope I helped!
8 0
2 years ago
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zalisa [80]
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2 years ago
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