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Crank
3 years ago
8

Three runners recorded their times for the 40-yard dash

Mathematics
2 answers:
egoroff_w [7]3 years ago
6 0

Answer:

The fastest runner is Alana because she had the least mean running time. The most consistent runner is Lorena because she had the least interquartile range value.

Dimas [21]3 years ago
4 0

Answer: The fastest runner is Alana because she had the least mean running time. The most consistent runner is Lorena because she had the least interquartile range value.

Step-by-step explanation:

i did the quiz

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Grace is three times as old as Hans, but in 5 years she will be twice as old as Hans is then. How old are they now? Set up an th
frosja888 [35]

Answer:

3x - y = 0; 2x - y = -5

Step-by-step explanation:

Let x be the present age of Hans and y be the present age of Grace,

Since, in present Grace is three times as old as Hans,

⇒ y = 3x

⇒ 3x - y = 0

Now, after 5 years,

The age of Hans = x + 5,

And, the age of Grace = y + 5

Also, in 5 years Grace will be twice as old as Hans is then,

⇒ y + 5 = 2 ( x + 5 )

⇒ y + 5 = 2x + 10

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Hence, the required system of linear equations is,

3x - y = 0; 2x - y = -5

5 0
3 years ago
in 1991, a gallup poll reported this percent to be 79%. using the data from this poll, test the claim that the percent of driver
snow_lady [41]

We reject our null hypothesis, H₀, at a level of significance of =0.01 since the P-value is less than that threshold. There is compelling statistical data to indicate that since 1991, the proportion of drivers who love driving has decreased.

Given,

The Pew Research Center recently polled n=1048 U.S. drivers and found that 69% enjoyed driving their automobiles.

In 1991, a Gallup poll reported this percentage to be 79%. using the data from this poll, test the claim that the percentage of drivers who enjoy driving their cars has declined since 1991.

To report the large-sample z statistic and its p-value,

Null hypothesis,

H₀ : p = 0.79

Alternative hypothesis,

Ha : p < 0.79

Level of significance, α = 0.01

Under H₀

Test statistic,

Z_0= \frac{\hat p - p}{\sqrt{\frac{p(1-p)}{n} }  }

Z₀ = -7.948

The alternative hypothesis(Ha) is left-tailed, so the P-value of the test is given by

P-value = P(z <-7.945)

            = 0.000     (from z-table)

Since the P-value is smaller than given level of significance, α=0.01 we reject our null hypothesis, H₀, at α=0.0.1 level Strong statistical evidence to conclude that the percentage of drivers who enjoy driving their cars has declined since 1991.

To learn more about hypothesis click here:

brainly.com/question/17173491

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5 0
1 year ago
Please help picture below
Strike441 [17]
The answer is 5 and 0

(-5) + 5 = 0
4 0
2 years ago
Whats is the measure of ikj
zimovet [89]

The is Answer: 202 because I answered it

6 0
3 years ago
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What is the equation of the line that passes through the point (5,0) and has slope of 2/5
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Answer:
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Explanation:

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