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MakcuM [25]
3 years ago
13

How to reduce 3/63 to its simplest form

Mathematics
1 answer:
vova2212 [387]3 years ago
8 0

Answer:

1/21

Step-by-step explanation:

you can reduce both 3 and 63 by 3

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You have measured the systolic blood pressure of a random sample of 25 employees of a company located near you. A 95% confidence
Alla [95]

Answer:

122 \leq \mu \leq 138

The 95% confidence interval would be given by (122;138)

And the correct interpretation for this case is:

c. If the procedure were repeated many times, 95% of the resulting confidence intervals would contain the population mean systolic blood pressure.

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % where by a population means lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

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".  

Solution to the problem

The confidence interval for the mean is given by the following formula:  

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}} (1)  

In order to calculate the critical value t_{\alpha/2} we need to find first the degrees of freedom, given by:  

df=n-1=25-1=24  

Since the Confidence is 0.95 or 95%, the value of \alpha=0.05 and \alpha/2 =0.025, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.025,24)".And we see that t_{\alpha/2}=2.06  

Now we have everything in order to replace into formula (1), for this case we got:

122 \leq \mu \leq 138

The 95% confidence interval would be given by (122;138)

And the correct interpretation for this case is:

c. If the procedure were repeated many times, 95% of the resulting confidence intervals would contain the population mean systolic blood pressure.

6 0
3 years ago
Plzzzzzzzzzzzzzzzzzzzzzzzzzz help quick
SCORPION-xisa [38]
It is C, because the x values between the first dot and the second is 4. So you multiply the slope 4 times on the y value. The y value changes from -2 to -5, so -2 + 4*-3/4 should be equal to -5
5 0
3 years ago
Tony has 24 stamps in his collection this is 1/3 times the number of Jordan has how many stamps does Jordan have
Cerrena [4.2K]
You have to find 1/3 of 24, so it is  8
7 0
3 years ago
Given x less than y, compare the following expressions and determine which is greater: 2x-y;2y-x. Explain your answer
sweet [91]

Let's form the difference of the two expressions and see what we can learn.

(2y -x) -(2x -y) = 2y -x -2x +y = 3y -3x = 3(y -x)

Since y > x, this is positive, so 2y -x is greater than 2x -y.

8 0
3 years ago
Why the order of the coordinates does not matter when calculating length
Rudiy27
The formula for calculating length is:
\sqrt{ (x_b-x_a)^{2} + (y_b-y_a)^{2} }

We can also write x_a - x_b or y_a - y_b
Why it does not matter?
Let's assume we have 2 numbers, a and b.
When we perform a subtraction:
a-b, we get another number c
When we perform another subtraction:
b-a, we get a number -c

When we raise c or -c to the power of 2, the result is the same, c^{2}.
4 0
3 years ago
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