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lorasvet [3.4K]
3 years ago
11

Given the speeds of each runner below, determine who runs the fastest.

Mathematics
1 answer:
nikdorinn [45]3 years ago
4 0

Answer:

Stephanie runs the fastest.

Step-by-step explanation:

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You have to average at least a "90" on your test scores to get an "
Ganezh [65]
The next score is 90 because 85+91+92+92=360/4= 90 average.
4 0
3 years ago
A study was conducted to determine whether magnets were effective in treating pain. The values represent measurements of pain us
amm1812

Answer:

Given:

Sham: n= 20,     x=0.44,   s=1.24,

Magnet:n= 20,  x =0.49,   s= 0.95

For Sham:

Sample size, n = 20

Sample mean = 0.44

Standard deviation = 1.24

For Magnet:

Sample size = 20

Sample mean = 0.49

Standard deviation = 0.95

The null and alternative hypotheses:

H0: s1²=s2²

H1: s1² ≠ s2²

a) To find the test statistics, use the formula:

\frac{s1^2}{s2^2}

\frac{1.24^2}{0.95^2} = \frac{1.5376}{0.9025} = 1.7037

Test statistics = 1.7037

b) P-value:

Sham: degrees of freedom = n - 1 = 20 - 1 = 19

Magnet: degrees of freedom = n - 1 = 20 - 1 = 19

The critical values:

[Za/2, df1, df2)], [(1 - Za/2), df1, df2]

f[0.05/2, 19, 19], f[(1 - 0.05/2), 19, 19]

f[0.025, 19, 19], f[0.975, 19, 19]

(2.526, 0.3958)

The rejection region:

Reject H0, if  F < 0.3958 or if F > 2.526

c) Conclusion:

Since the critical values of test statistic is between (0.3958 < 1.7037 < 2.526), we fail to reject null hypothesis H0.

There is insufficient evidence to to support the claim that those given a sham treatment have reductions that vary more than those treated with magnets

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3 years ago
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Olegator [25]

Step-by-step explanation: Remember that the parent graph f(x) = x², is a parabola that opens up and passes through the origin.

Notice that g(x) = x² + 2 has 2 added to the parent term.

This means that g(x) = x² + 2 is the graph of f(x) = x² translated two units up.

5 0
2 years ago
Write 40% as a fraction in simplest form.
professor190 [17]

Answer:

4/10

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
2 1/4 and 1 3/8 simplest form multiply
IceJOKER [234]
2 1/4 * 1 3/8 = 3 3/32 or 99/32
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3 years ago
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