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sesenic [268]
3 years ago
12

What’s are the steps to solve 52.2x2.3

Mathematics
2 answers:
sammy [17]3 years ago
7 0
52.2
x. 2.3
————-
15 6 6
104 4

Add them and you will get 12006
Since there are two dots bring them from the back and add them which will bring your final answer to 120.06

Sorry if the multiplication wasn’t clear
forsale [732]3 years ago
6 0

Line up the decimal points and multiply the rest like you would normally do it but drop down the decimal at the end
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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
12 times a number plus 26 greater than 6
weeeeeb [17]

Answer:I am a little confused by your wording but I am assuming the question is 12 times what is 26 greater than 6

The answer would be 2.66666666667 which sound incorrect but multiply by 12 and you get 32 and 6 + 26= 32

Step-by-step explanation:

8 0
3 years ago
How to find volume of the liquid
VladimirAG [237]
Volume is equal mass by density
4 0
3 years ago
Read 2 more answers
How can you write a quadratic function in standard form, given it’s vertex form?
ZanzabumX [31]

Answer:yhdrydrydtrr

Step-by-step explanation:dsrt5tdty

7 0
3 years ago
True or False. To select 3 items out of 4 distinct objects, use C(4,3).
kenny6666 [7]

Answer:

True.

Step-by-step explanation:

C(4, 3) means the number of combinations from 4 items taking 3 at a time.  We are selecting 3 distinct items and it doesn't say anything about the order in which they are selected , so we use  a combination formula  not a permutation ( where order does matter).

C(4, 3)  = 4! / 3! 1!

= 4*3*2*1 / 3*2*1*1

= 4.

There are 4 ways to select 3 items from 4.

6 0
3 years ago
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