A race is 10 kilometers long. Markers will be placed at every 500-meter mark. How many markers do you need

Mathematics

1 answer:

DENIUS [597]3 years ago

3 0

You will need 50 because 10 divided by 500 is 50 so you will need 50 markers.<span />

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The least squares regression line is y=0.6831x+11.25

Step-by-step explanation:

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First find the slope, m of the line from the means and standard deviations given

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The correlation coefficient in both cases is 0.83, hence the slope m is given by;

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Find the value of b, the y-intercept

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b=23.5-0.6831*17.2

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The LSRL is y=0.6831x+11.25

Learn More

Least Squares regression Line : brainly.com/question/4090838

Keyword : standard deviation, least square regression line

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3 years ago

In a box of 25 external hard disks, there are 2 defectives. An inspector examines 5 of these hard disks. Find the probability th

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Answer:

0.3667 or 36.67%

Step-by-step explanation:

The probability of getting at least 1 defective hard disk among the 5 (P(X>0)) is equal to 100% minus the probability of getting none defectives (1-P(X=0)).

If 23 out of 25 hard disks are non-defective, the probability is:

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The probability that there is at least 1 defective hard disk is 0.3667 or 36.67%.

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