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qwelly [4]
1 year ago
13

The birth weights of the 908 babies born at Valley Hospital in 2019 were normally

Mathematics
1 answer:
photoshop1234 [79]1 year ago
7 0

The number of babies that weighed more than 10 pounds is 43 using Z-

Score Table.

What is normal distribution?

A probability distribution that is symmetric about the mean is the normal distribution, sometimes referred to as the Gaussian distribution. It demonstrates that data that are close to the mean occur more frequently than data that are far from the mean. The normal distribution is depicted graphically as a "bell curve."

Given that total number of babies is 908.

The mean of the normal distribution is 7.2 pound.

The standard deviation of the normal distribution is 1.5 pound.

The formula of z score is z = (x - μ)/σ

In the given question x = 10, μ = 1.5, σ = 7.2

z score = (10 - 7.2)/1.5 = 1.86667

P-value from Z-Table:

P(x<10) = 0.96903

P(x>10) = 1 - P(x<10) = 0.030974

The number of babies that weighed more than 10 pounds is ( 0.030974 × 908) = 43.39 = 43 (approx.)

To learn more about normal distribution, click on below link:

brainly.com/question/15103234

#SPJ1

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Answer:

The sample size to obtain the desired margin of error is 160.

Step-by-step explanation:

The Margin of Error is given as

MOE=z_{crit}\times\dfrac{\sigma}{\sqrt{n}}

Rearranging this equation in terms of n gives

n=\left[z_{crit}\times \dfrac{\sigma}{M}\right]^2

Now the Margin of Error is reduced by 2 so the new M_2 is given as M/2 so the value of n_2 is calculated as

n_2=\left[z_{crit}\times \dfrac{\sigma}{M_2}\right]^2\\n_2=\left[z_{crit}\times \dfrac{\sigma}{M/2}\right]^2\\n_2=\left[z_{crit}\times \dfrac{2\sigma}{M}\right]^2\\n_2=2^2\left[z_{crit}\times \dfrac{\sigma}{M}\right]^2\\n_2=4\left[z_{crit}\times \dfrac{\sigma}{M}\right]^2\\n_2=4n

As n is given as 40 so the new sample size is given as

n_2=4n\\n_2=4*40\\n_2=160

So the sample size to obtain the desired margin of error is 160.

4 0
3 years ago
Charles has $87 in his checking account. He spent $14 and $17, then deposited $33. If he wants to buy a television that cost $18
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Answer:

He need $99 more

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Answer: I believe its 5/9

Step-by-step explanation:  

As you can see, the only fraction that doesn't equal 0.53, or the outlier, is 5/9 or 0.5556

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What is absolute value?
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Absolute value is when you have either a positive or negative value within a set of "parentheses" or what look just like vertical lines and whatever is within those line stays or becomes positive. The only exception to this is when there is a negative on the outside to act upon the positive values within.
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Answer:

y=4/5x+1

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Equation:

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