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givi [52]
3 years ago
12

PLS HELP ASAP PLS WILL MARK BRAINLIEST

Mathematics
1 answer:
hoa [83]3 years ago
5 0
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Unit sales for new product ABC have varied in the first seven months of this year as follows: Month Jan Feb Mar Apr May Jun Jul
Alecsey [184]

Answer:

\sigma = 121.53

Step-by-step explanation:

Required

The population standard deviation

First, calculate the population mean

\mu = \frac{\sum x}{n}

This gives:

\mu = \frac{148+ 329+ 491 +167+ 228+285+ 441}{7}

\mu = \frac{2089}{7}

\mu = 298.43

The population standard deviation is:

\sigma = \sqrt{\frac{\sum(x - \bar x)^2}{n}}

So, we have:

\sigma = \sqrt{\frac{(148 - 298.43)^2 + ..........+ (441- 298.43)^2}{7}}

\sigma = \sqrt{\frac{103387.7143}{7}}

\sigma = \sqrt{14769.6734714}

\sigma = 121.53

8 0
3 years ago
Which inequality is a true statement? Select each correct answer. −5≥−7 −5≤−7 −5>−7 −5<−7 −5=−7
NISA [10]

Well, I do not know if I read this correctly. Are these the answers?

-5 ≥ -7

-5 ≤ -7

-5 > -7

-5 < -7

-5 = -7

If so, then -5 > -7 is a true statement because -5 is greater than -7.

7 0
3 years ago
Read 2 more answers
What does w equal in 3w + 7 = 19
EleoNora [17]

Answer:

w=4

Step-by-step explanation:

So we have the equation:

3w+7=19

Subtract 7 from both sides:

3w=12

Divide both sides by 3:

w=4

So, the value of  w is 4.

And we're done!

3 0
4 years ago
Read 2 more answers
Fractions that have different denominators are called
scoray [572]
They are called unike fractions. If u would want to do anything to them u would have to make the denominaters the same
5 0
4 years ago
Read 2 more answers
Anyone know how to do this? I’m stuck
DanielleElmas [232]
I’ll make it easier, so for number 2 on number 6 7/8 times 8 and 6 and you have 48, then add the top number which would be 55. Then for the second number, 4 1/3 do the same thing! 4*3= 12+1= 13 then add 13+55 and your answer is 68! Then put it in fraction form! 17/25, then all you do is simplify it! If it can’t be simplified (17/25 can not be simplified), it stays the same. Hope that helps! :)
3 0
4 years ago
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