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Dmitry [639]
3 years ago
5

The heights of five-year-olds are Normally distributed with a mean of 42.5 inches and a standard deviation of 2.5 inches. A rand

om sample of 16 five-year-olds is taken and the mean height is recorded. What would be the standard deviation of the sampling distribution of all possible samples of size 16?
0.16
0.63
2.5
2.66
Mathematics
1 answer:
rjkz [21]3 years ago
8 0

Answer:

0.63

Step-by-step explanation:

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A scuba diver dove 313 feet below sea level then rose 26 feet?
klasskru [66]

Answer:

I think the answer would be 287?

Step-by-step explanation:

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3 years ago
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Solve by transforming into a perfect square trinomial<br><br> x squared-14x=15
ycow [4]
X^2 - 14 x  = 15

(x - 7)^2 - 49 = 15

(x-7)^2 = 64

x - 7 = - or  + 8

x = 15  or -1 

Just take half o the coefficient of x and subtract it squared as above.

In general

x^2 + ax = b

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What is the solution to the proportion? n/18 = 5/9 (i think its 10)
umka2103 [35]
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5 0
3 years ago
Y and x have a proportional relationship, and y = 9 when x = 2. What is the value of y when x = 3?
Illusion [34]
Correct formula is y = kx, where k is the "constant of proportionality."

If y = 9 when x = 2, then 9 = k(2), or k = 9/2.

Then y = (9/2)x.

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5 0
3 years ago
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A car travels around a circular track of radius 1.5 miles. It traversed35of a complete revolution. Howfar did it travel?
Arturiano [62]

Answer:

The total distance traveled by the car is 330 miles.

Step-by-step explanation:

The circular track is the circumference of circle with radius 1.5 miles.

Circumference of a circle = 2\pir

Thus,

Circumference of the track  = 2 x \frac{22}{7} x 1.5

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But, one complete revolution by the car is the circumference of the track.

i.e One complete revolution round the track = 9.4286571429 miles

Therefore,

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7 0
3 years ago
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