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Karo-lina-s [1.5K]
3 years ago
14

DELL 5+5what's a girl Raymond ​

Mathematics
1 answer:
kotykmax [81]3 years ago
7 0
Ray? What are u asking me right now.
You might be interested in
Quick guys, I need some help on this
worty [1.4K]

Answer:

I think c

(not sure though)

3 0
2 years ago
Suppose the heights of a population of people are normally distributed with a mean of 65.5 inches and a standard deviation of 2.
kupik [55]

Answer:

a) P(64.2

b) 69.764

Step-by-step explanation:

1) 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".

2) Part a

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

X \sim N(65.5,2.6)

Where \mu=65.5 and \sigma=2.6

We are interested on this probability

P(64.2

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(64.2

And we can find this probability on this way:

P(-0.50

And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.

P(-0.50

3) Part b

For this part we want to find a value a, such that we satisfy this condition:

P(X>a)=0.05   (a)

P(X   (b)

Both conditions are equivalent on this case. We can use the z score again in order to find the value a.

As we can see on the figure attached the z value that satisfy the condition with 0.95 of the area on the left and 0.05 of the area on the right it's z=1.64. On this case P(Z<1.64)=0.95 and P(z>1.64)=0.05

If we use condition (b) from previous we have this:

P(X  

P(z

But we know which value of z satisfy the previous equation so then we can do this:

z=1.64

And if we solve for a we got

a=65.5 +1.64*2.6=69.764

So the value of height that separates the bottom 95% of data from the top 5% is 69.764.

5 0
3 years ago
1.7x55 show how to answer
Darya [45]

Answer:

93.5

Step-by-step explanation:

55          multiply

<u>1.7</u>

385  ≥  add 385 and 550

<u>550</u>

935    and get 935

Hope this helped you!! i tried to label it the best i could.

8 0
2 years ago
Read 2 more answers
Compute simplify 1 2/3 (5 2/7)=
Doss [256]

Answer:

29.714

Step-by-step explanation:

12/3 (52/7) = 4 *( 52/7) = 29.714

7 0
3 years ago
Anyone knows the number sequence of 7,8,15,23,38? ​
OLga [1]
Sequence
8 - 7 = 1
15 - 8 = 7
23 - 15 = 8
38 - 23 = 15
For more sequences
38 + 23 = 61
Then
61 + 38 = 99
And so on the sequence continue
5 0
2 years ago
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