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3 years ago

11

3 m 6 m 6 m 10 m Perimeter: Area:

1 answer:

astra-53 [7]3 years ago

6 0

Answer:

perimeter-3+6+3+10+6+4=32m

area- 10×6=60m²

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Let x denote the courtship time for a randomly selected female–male pair of mating scorpion flies (time from the beginning of in

gavmur [86]

Complete Question:

a) Is it plausible that X is normally distributed?

b) For a random sample of 50 such pairs, what is the (approximate) probability that the sample mean courtship time is between 100 min and 125 min?

Answer:

a) It is plausible that X is normally distributed

b) probability that the sample mean courtship time is between 100 min and 125 min is 0.5269

Step-by-step explanation:

a)X denotes the courtship time for the scorpion flies which indicates that is a real - valued random variable, and since normal distribution is a continuous probability distribution for a real valued random variable, it is plausible that X is normally distributed.

b) Probability that the sample mean courtship time is between 100 min and 125 min

$\mu = 120\\n = 50$

$P(x_{1} < \bar{X} < x_{2} ) = P(z_{2} < \frac{x_{2}- \mu }{SD} ) - P(z_{1} < \frac{x_{2}- \mu }{SD})$

$SD = \sqrt{\frac{\sigma^{2} }{n} } \\SD = \sqrt{\frac{110^{2} }{50} } \\SD = 15.56$

$P(100 < \bar{X}$

From the probability distribution table:

$P(z_{2} < 0.32 ) = 0.6255\\ P(z_{1} < -1.29) = 0.0986$

$P(100 < \bar{X}$

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3 years ago

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3 years ago

If 3 is divided into pieces that are 1/2 of a whole each, how many pieces are there in total?

ololo11 [35]

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Answer:

I think that would be R

Step-by-step explanation:

A Variable is a symbol for a number we don't know yet. It is usually a letter like x or y. A number on its own is called a Constant.

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3 years ago

A gallon of Moo Milk costs $5.12. What is the price, in dollars, of an 8 ounce glass of Moo Milk? There are 128 ounces in 1 gall

Trava [24]

<h2>Answer:</h2>

$0.32.

<h2>Explanation:</h2>

1 gallon = 128 fluid ounces.

So to find the price of an 8 ounce glass of Moo Milk we need to multiply (8/128) x 5.12.

That equals $0.32.

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3 years ago

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