Statistics question, please help.

Mathematics

2 answers:

Leto [7]3 years ago

8 0

Answer will be C y=-x+6
Why?
The line or scatterpoints are going down from left to right which means it is a negative slope
As you can see one point is at 1,5 and the other is at 0,6 which means the slope goes down by 1
Giving you -x
What is the y intercept?? It is 6 so that completes the line equation
Y=-x+6 hope that helps

Mashcka [7]3 years ago

4 0

Firstly the line is decreasing that means the slope is negative

& the only equations where the slopes are negative are

y= - x + 6 & y = -2x + 6

Replacing x by some value, you will find that y= -2x +6 best fit this scatterplot

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Violet answered 166 questions correctly on her multiple choice science final that had

Vinil7 [7]

Answer:

83%

Step-by-step explanation:

No. of questions answered correctly = 166

Total no. of questions = 200

Percentage of questions answered correctly = (166/200)*100 = 83%

3 0

3 years ago

Five hundred eleven (511) homes in a certain southern California community are randomly surveyed to determine if they meet minim

allsm [11]

Answer:

The confidence interval at the 90% confidence level for the true population proportion of southern California community homes meeting at least the minimum recommendations for earthquake preparedness is (0.3136, 0.3830).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence interval $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

Z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

For this problem, we have that:

511 homes were surveyed, of which 178 met the minimum recommendations for earthquake preparedness. This means that $n = 511$ and $p = \frac{178}{511} = 0.3483$ .

Find the confidence interval at the 90% confidence level for the true population proportion of southern California community homes meeting at least the minimum recommendations for earthquake preparedness.

So $\alpha = 0.10$ , z is the value of Z that has a pvalue of $1 - \frac{0.10}{2} = 0.95$ , so $z = 1.645$ .