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3 years ago

HELP HELP PLEEEAASSSEE!

Mathematics

2 answers:

Nitella [24]3 years ago

3 0

Answer:

What's the question?

Step-by-step explanation:

adoni [48]3 years ago

3 0

Answer:

What do you need help with?

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What is the gcf for 42n - 27s

Trava [24]

Answer:

Step-by-step explanation:

5 0

3 years ago

Write a numerical expression with exponents to describe the sum of 3x3x3x3 and 36

grandymaker [24]

Answer:

3^3 and 36^1

Step-by-step explanation:

3x3x3x3 is multiplying that 4 times so it is to the power of 4

36 is just once so it is to the power of one

4 0

3 years ago

Read 2 more answers

The manager of a grocery store has selected a random sample of 100 customers. The average length of time it took these 100 custo

Tanya [424]

Answer:

b. remains unchanged

Step-by-step explanation:

Formula for standard error of mean is;

SE = σ/√n

From the above, we can see that the standard error of mean is independent of the confidence coefficient as it doesn't affect the SE.

Now, we are given that;

random sample; n = 100

Standard deviation; σ = 1

Thus;

SE = 1/√100

SE = 1/10

Now, even if the confidence coefficient is reduced, we can see that it has no impact on the standard error of mean.

Thus, SE remains unchanged.

7 0

3 years ago

Micah jogged 8/10 of a mile. Sarah jogged 3 times this distance. How far did Sarah jog? Explain

bogdanovich [222]

Answer:

2.4 miles or 12/5 miles

Step-by-step explanation:

well if we take the amount Micah jogged (8/10 miles) and we multiply that by 3 in order to get Sarah's distance

it leaves us with

24/10 and that simplified will be

12/5 miles

in decimals that would be

2.4 miles

5 0

3 years ago

Six different second-year medical students at Bellevue Hospital measured the blood pressure of the same person. The systolic re

ArbitrLikvidat [17]

Answer:

$Range = 149-131=18$

$s^2 =\frac{(131-139.5)^2 +(137-139.5)^2 +(138-139.5)^2 +(141-139.5)^2 +(141-139.5)^2 +(149-139.5)^2}{6-1}=35.1$ $s =\sqrt{35.1}=5.9$

B. Ideally, the standard deviation would be zero because all the measurements should be the same.

Step-by-step explanation:

For this case we have the following data:

131 137 138 141 141 149

For this case the range is defined as $Range = Max-Min$

And for our case we have $Range = 149-131=18$

First we need to calculate the average given by this formula:

$\bar X = \frac{\sum_{i=1}^n X_i}{n}=\frac{837}{6}=139.5$

We can calculate the sample variance with the following formula:

$s^2 = \frac{\sum_{i=1}^n (X_i -\bar x)^2}{n-1}$

And if we replace we got:

$s^2 =\frac{(131-139.5)^2 +(137-139.5)^2 +(138-139.5)^2 +(141-139.5)^2 +(141-139.5)^2 +(149-139.5)^2}{6-1}=35.1$

And the standard deviation is just the square root of the variance so then we got:

$s =\sqrt{35.1}=5.9$

If the subject's blood pressure remains constant and the medical students correctly apply the same measurement technique, what should be the value of the standard deviation?

For this case the variance and deviation should be 0 since we not evidence change then we not have variation. And for this case the best answer is:

B. Ideally, the standard deviation would be zero because all the measurements should be the same.

8 0

3 years ago