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jekas [21]
3 years ago
14

Help what is the answer

Mathematics
2 answers:
weeeeeb [17]3 years ago
6 0
9^2 divided by 3(n), when n=1, is    9^2 divided by 3.  This, in turn, is
                                                         81/3
                        which comes out as     27
Elina [12.6K]3 years ago
3 0
9^2 / 3(1)
81 / 3 =27
A is the answer
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The distribution of the average amount of sleep per night gotten by college students is roughly bell-shaped with mean 412 minute
kirza4 [7]

Answer:

P(X

P(z

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the scores of a population, and for this case we know the distribution for X is given by:

X \sim N(412,68)  

Where \mu=412 and \sigma=68

We are interested on this probability

P(X

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(X

And we can find this probability using the normal standard table or excel and we got:

P(z

4 0
3 years ago
If you divide the age of the first President Bush when he was inaugurated by 2 and add 14 years, you get the age of President Cl
konstantin123 [22]

Answer:

64

Step-by-step explanation:

32+14=46

8 0
2 years ago
can you please explain to me how 570ml = oz. I'm having a hard time figuring it out. I'm having a problem with converting.
Vladimir79 [104]
19.2740122 fluid ounces = 570 milliliters. I'm positive this really is the answer.  :)
8 0
3 years ago
Help me please!!! 45 points to whoever helps!!
kap26 [50]
I don’t know 775 re2566
7 0
2 years ago
What is the slope of the line that contains the points (-2, 2) and (3, 4)?
Vladimir79 [104]

Answer:

2/5

Step-by-step explanation:

The slope is given by

m= (y2-y1)/(x2-x1)

  = (4-2)/(3 - -2)

   = 2/(3+2)

    = 2 /5

5 0
2 years ago
Read 2 more answers
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