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3 years ago

9

A baseball player has a batting average of 0.250, which means he gets a hit 25% of the time he is at bat. If he bats 450 times d

uring the season, how many hits should he expect to get

1 answer:

dmitriy555 [2]3 years ago

3 0

Answer:

112.5

Step-by-step explanation:

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Help pls! 10 points!

Zarrin [17]

Do I have to do all of them?

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3 years ago

The heights of a certain population of corn plants follow a normal distribution with mean 145 cm and stan- dard deviation 22 cm

Firdavs [7]

Answer with explanation:

Given : The heights of a certain population of corn plants follow a normal distribution with mean $\mu=145\ cm$ and standard deviation $\sigma=22\ cm$

a) Using formula $z=\dfrac{x-\mu}{\sigma}$ , the z-value corresponds to x= 135 will be

$z=\dfrac{135-145}{22}\approx-0.45$

At x= 155, $z=\dfrac{155-145}{22}\approx0.45$

The probability that plants are between 135 and 155 cm tall :-

$P(-0.45$

Hence, 34.73% of the plants are between 135 and 155 cm tall.

b) Sample size : n= 16

Using formula $z=\dfrac{x-\mu}{\dfrac{\sigma}{\sqrt{n}}}$ , the z-value corresponds to x= 135 will be

$z=\dfrac{135-145}{22}{\sqrt{16}}\approx-1.82$

At x= 155, $z=\dfrac{155-145}{22}{\sqrt{16}}\approx1.82$

The probability that plants are between 135 and 155 cm tall :-

$P(-1.82$

Hence,The percentage of the samples would the sample mean height be between 135 and 155 cm.= 93.12%

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2,3,5,6. Only plz and thank u

vfiekz [6]

For 3, it is an isosceles triangle and it is an acute triangle.

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3 years ago

For the following questions answer independent, dependent, or both. a) This probability causes you to subtract one from the tota

Elden [556K]

Answer:

(a)Dependent

(b)Both

(c)Independent

Step-by-step explanation:

a) When selections are made without replacement, the second(next) outcome is dependent of the first(previous) outcome. Therefore, we subtract one from the draw on the total.

Dependent

(b)The probability of Event A and Event B is the multiplication of the probability of event A and the probability of event B. Events A and B can either be dependent or independent.

Both

(c)When selections are made with replacement, the next outcome is independent of the previous outcome. Therefore, we say that the two events are independent.

Independent

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3 years ago

Compare models for 1/3 and 2/6. how does the number of parts relate to the sizes of parts?

Effectus [21]

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3 years ago