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3 years ago

What is s the mean of this set of data 1,5,8,10,11,4,8,9

Mathematics

2 answers:

Anna [14]3 years ago

4 0

The mean is 7.......

ANTONII [103]3 years ago

3 0

The answer is 7 because if you add them all up you get 56 then you divide it by 8 and you get 7

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Suppose heights of seasonal pine saplings are normally distributed and have a known population standard deviation of 17 millimet

Mumz [18]

Answer:

$296.693\leq x\leq 319.307$

Step-by-step explanation:

The confidence interval for the population mean x can be calculated as:

$x'-z_{\alpha /2}\frac{s}{\sqrt{n} } \leq x\leq x'+z_{\alpha /2}\frac{s}{\sqrt{n} }$

Where x' is the sample mean, s is the population standard deviation, n is the sample size and $z_{\alpha /2}$ is the z-score that let a proportion of $\alpha /2$ on the right tail.

$\alpha$ is calculated as: 100%-99%=1%

So, $z_{\alpha/2}=z_{0.005}=2.576$

Finally, replacing the values of x' by 308, s by 17, n by 15 and $z_{\alpha /2}$ by 2.576, we get that the confidence interval is:

$308-2.576\frac{17}{\sqrt{15} } \leq x\leq 308+2.576\frac{17}{\sqrt{15} }\\308-11.307 \leq x\leq 308+11.307\\296.693\leq x\leq 319.307$

6 0

3 years ago

10x-2x in fewer terms

Aleks04 [339]

Answer:

Step-by-step explanations:

10x - 2x

5 0

2 years ago

Mr Langley sold all but 10 of his old computers for R500 each . He received R32 500 from the sale .How many computers did he ori

velikii [3]

Answer:

75 computers

Step-by-step explanation:

R 32500 / R 500= 65 sold

65 +10= 75 computers originally

5 0

3 years ago

There is a picture attached. that is the question

enot [183]

-2

explanation:

coefficient is the number in front of the term it's asking for. so the number in front of x² would be the -2.

another tip the b's represents x in that equation!!

7 0

3 years ago

Sylvie folds a large piece of paper in half. The fold divides the paper into two equal parts. She folds it in half again. When s

Nikolay [14]

Each time you fold a paper it will double the amount of parts. When you think about it, it's just multiplying by 2 a bunch of times.

One fold is 2 times 1, which is 2.
The second fold is 2 times 2, which is 4.
The third fold is 4 times 2, which is 8.

Using this process, we can simplify that into exponents. If the amount of times you fold is x and the parts double for each fold, then the amount of parts can be represented by:

$2^{x}$

So if the amount of parts is given and we need the amount of folds, just keep doubling until you get to 64. The amount of times you doubled is the number of times Sylvie folded.

Later you will learn that the opposite of an exponent is a logarithm, which would look like this:

$log_{2}(64) = ?$

But don't worry about that yet.

6 0

3 years ago