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sukhopar [10]
3 years ago
10

The number of violent crimes committed in a day possesses a distribution with a mean of 2.2 crimes per day and a standard deviat

ion of 6 crimes per day. A random sample of 100 days was observed, and the mean number of crimes for the sample was calculated. Describe the sampling distribution of the sample mean. Group of answer choices
Mathematics
1 answer:
VARVARA [1.3K]3 years ago
6 0

Answer:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

And replacing we got:

\mu_{\bar X}= 2.2

\sigma_{\bar X}= \frac{6}{\sqrt{100}}= 0.6

Step-by-step explanation:

For this case we have the following info given:

\mu = 2.2 represent the mean

\sigma = 6 represent the deviation

We select a sample size of n=100. This sample is >30 so then we can use the central limit theorem. And we want to find the distribution for the sample mean and we know that the distribution is given by:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

And replacing we got:

\mu_{\bar X}= 2.2

\sigma_{\bar X}= \frac{6}{\sqrt{100}}= 0.6

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Joseph wants to estimate 1 3/7 . 5 4/5 To estimate, he simplifies the expression 1 1/2 . 6 Is Joseph’s estimate an underestimate
Zolol [24]


Well if her simplifies 1 3/7 to 1 1/2 and 5 4/5 to 6 then he would be overestimating because 1 1/2 is greater than 1 3/7 and 6 is greater than 5 4/5

Hope this helps!

7 0
3 years ago
Elise says, "If you subtract 14 from my number and multiply the difference by - 3, the result is - 63."
Ksivusya [100]
Answer:
35

Explanation:
Let x be equal to Elise’s number.
We can set up our equation like this:

(x-14)(-3)=-63
Expand the parentheses
-3x+42=-63
Subtract both sides by 42
-3x+42-42=-63-42
-3x=-105
Divide both sides by -3
-3x/-3=-105/-3
x=35

I hope this helps!
6 0
3 years ago
Read 2 more answers
3. It takes 200 lb of sugar cane to produce 5 lb
Wittaler [7]
The correct answer is 8,000 lb. set it up as a proportion and solve for the missing value
6 0
3 years ago
The size of rectangular television screen is given as the length of the diagonal of the screen. Find the size of a television sc
ValentinkaMS [17]

Answer:

The size of a television screen is 48\ in

Step-by-step explanation:

Let

x-----> the length of the diagonal of the screen

we know that

Applying the Pythagoras Theorem

x^{2}=H^{2}+W^{2}

we have

H=38.4\ in

W=28.8\ in

substitute the values

x^{2}=38.4^{2}+28.8^{2}

x^{2}=2,304

x=48\ in

6 0
3 years ago
PLZ HELP ASAP!!!!! I NEED IT BADLY!!!!!
Vanyuwa [196]
131/5 divided by 11/1
to divide by fractions, you multiply by the reciprocal and the reciprocal of 11/1 is 1/11...
131/5•1/11 and you just multiply across so the answer is every 131/55 miles. if you want it as a mixed number, it's 2 21/55
5 0
3 years ago
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