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Minchanka [31]
2 years ago
9

The finishing times of two runners for several one-mile races, in minutes, are shown in the box and whisker plots.

Mathematics
1 answer:
Dmitrij [34]2 years ago
6 0

Answer:

跑着2

Step-by-step explanation:

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Please answer all of this!!!! will give brainliest!!!
timurjin [86]

Answer:

I can't see it that well. sorry!

Step-by-step explanation:

8 0
3 years ago
Brand name producers of aspirin claim that one advantage of their aspirin over generic aspirin is that brand name aspirin is muc
11Alexandr11 [23.1K]

Answer:

Step-by-step explanation:

The claim here is that the brand name aspirin is more consistent in the amount of active ingredient used than the generic aspirin.

This is a test of 2 independent groups. The population standard deviations are not known. Let μ1 be the mean amount of active ingredients in brand name aspirin and μ2 be the mean amount of active ingredients in generic name aspirin

The random variable is μ1 - μ2 = difference in the mean amount of active ingredients between the brand name and generic aspirin

We would set up the hypothesis.

The null hypothesis is

H0 : μ1 ≥ μ2 H0 : μ1 - μ2 ≥ 0

The alternative hypothesis is

H1 : μ1 < μ2 H1 : μ1 - μ2 < 0

This is a left tailed test

Since sample standard deviation is known, we would determine the test statistic by using the t test. The formula is

(x1 - x2)/√(s1²/n1 + s2²/n2)

From the information given,

x1 = 325.01

x2 = 323.47

s1 = 10.12

s2 = 11.43

n1 = 200

n2 = 180

t = (325.01 - 323.47)/√(10.12²/200 + 11.43²/180)

t = 1.24

1.237877

The formula for determining the degree of freedom is

df = [s1²/n1 + s2²/n2]²/(1/n1 - 1)(s1²/n1)² + (1/n2 - 1)(s2²/n2)²

df = [10.12²/200 + 11.43²/180]²/[(1/200 - 1)(10.12²/200)² + (1/180 - 1)(11.43²/180)²] = 1.53233946713/0.00537245359

df = 285

We would determine the probability value from the t test calculator. It becomes

p value = 0.108

Since alpha, 0.025 < than the p value, 0.108, then we would fail to reject the null hypothesis. Therefore, at 2.5% level of significance, these data support the brand name producers claim

5 0
3 years ago
PLEASE HEELP AND THANK YOU
sasho [114]
Huh huh huh huh huh huh huh
8 0
3 years ago
Read 2 more answers
I NEED ANSWERS FAST PLEASE ILL GIVE BRAINLIEST
malfutka [58]

Answer:

4. C

5. A

6. D

Step-by-step explanation:

3 0
2 years ago
9. What is the Greatest Common Factor (GCF) of 9 and 12? *<br> 108<br> о<br> O 36<br> o<br> 9<br> 3
Simora [160]

Answer:

3

Step-by-step explanation:

We found the factors and prime factorization of 9 and 12. The biggest common factor number is the GCF number. So the greatest common factor 9 and 12 is 3.

Hope this helps!

6 0
3 years ago
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