ANSWER THESE 2 QUESTIONS ASAP PLEASE PLEASE PLEASEEEEEEE!

Reil [10]

Answer: G

Step-by-step explanation:

(x, y) → ( $\frac{1}{8}x$ , $\frac{1}{8}y$ )

means that the new quadrilateral will be $\frac{1}{8}$ the size of the original quadrilateral, so it will be smaller because the it maps to a fraction that is less than 1.

5 0

2 years ago

Suppose a baker claims that the average bread height is more than 15cm. Several of this customers do not believe him. To persuad

laila [671]

Answer:

$17-2.262\frac{1.9}{\sqrt{10}}=15.641$

$17+2.262\frac{1.9}{\sqrt{10}}=18.359$

So on this case the 95% confidence interval would be given by (15.641;18.359)

And since the lower limit for the confidence interval is higher than 15 we can conclude that at 5% of significance the true mean is higher than 15 cm

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 % whereby 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".

$\bar X=17$ represent the sample mean

$\mu$ population mean (variable of interest)

s=1.9 represent the sample standard deviation

n=10 represent the sample size

Confidence interval

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:

$df=n-1=10-1=9$

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(0.025,9)".And we see that $t_{\alpha/2}=2.262$

Now we have everything in order to replace into formula (1):

$17-2.262\frac{1.9}{\sqrt{10}}=15.641$

$17+2.262\frac{1.9}{\sqrt{10}}=18.359$

So on this case the 95% confidence interval would be given by (15.641;18.359)

And since the lower limit for the confidence interval is higher than 15 we can conclude that at 5% of significance the true mean is higher than 15 cm

4 0

3 years ago

What is the perimeter of the shape below? 3 cm 4 cm 8 cm 4 cm

UNO [17]

Answer:

:D

Step-by-step explanation:

it is 19 cm

5 0

2 years ago

Could someone help me solve this step by step..thxx

jolli1 [7]

Answer:

Step-by-step explanation:

3^t=3^(1/5)

T=1/5

7 0

3 years ago

Read 2 more answers

Use estimation to help you choose the correct answer. 0.945 x 7.6 =

hoa [83]

Remark

The thing you must not do is write 7.182 as your answer. That is the exact answer found using a calculator.

What to do.

What you should do is multiply two rounded numbers together.

7.6 rounded is 8 roughly

0.945 is almost 1.

Your answer is 8*1 = 8 roughly. This skill is very handy when you are writing a test and you want to see if you've done the question correctly. It is easy to misplace a decimal or put in incorrect digits and this is a quick check on things like that.

7 0

3 years ago