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Black_prince [1.1K]

3 years ago

6

Help please !!!!!!!!

1 answer:

Sidana [21]3 years ago

5 0

It’s d because it is a negative slope and the b intercept is negative so it never is in the first quadrant

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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:

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

$P(100 < \bar{X}$

6 0

3 years ago

What is the volume of the cylinder with a radius of 8 and height of 4<br><br>

mr Goodwill [35]

Answer:

Hey there!

The formula for cylinder volume is $r^2h\pi$ , where r is the radius, h is the height, and $\pi$ is a constant, roughly equal to 3.14.

Substituting all of these values into the equation:

$8^2(4)(3.14)$

$804.84\\$

Thus, the volume for the cylinder is 804.84 units cubed.

Hope this helps :)

6 0

3 years ago

Read 2 more answers

Pls someone help me with this question pls

Butoxors [25]

So I don’t know if this is right or not but it should be for every 3 players there is 1 wiener

7 0

2 years ago

Can you find 2/3 of 120

polet [3.4K]

The only thing you should do is to multiply 2/3 by 120 so you will have 2*120/3 = 80 :)))
i hope this is helpful
have a nice day

6 0

2 years ago

More than $70 billion is spent each year in the drive-thru lanes of America’s fast-food restaurants. Having quick, accurate, and

artcher [175]

Answer:

a) There is no significant difference between restaurants with and without order-confirmation boards

b) -12.5 ± 3.604 or C.1.E (-16.10, -8.90)

Step-by-step explanation:

answers are in the attachment below

8 0

3 years ago