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tresset_1 [31]
3 years ago
9

Tank A initially contained 124 liters of water.

Mathematics
1 answer:
Taya2010 [7]3 years ago
4 0

The following amounts of water have not been listed.

However, to find m all you need to do it;

the amount of water which is in the tank - 124 = x

x ÷ 9 = m

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Some transportation experts claim that it is the variability of speeds, rather than the level of speeds, that is a critical fact
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Answer:

Explained below.

Step-by-step explanation:

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(1)

The hypothesis for both the test can be defined as:

<em>H</em>₀: The variance of speeds does not exceeds 75 (mph)², i.e. <em>σ</em>² ≤ 75.

<em>Hₐ</em>: The variance of speeds exceeds 75 (mph)², i.e. <em>σ</em>² > 75.

(2)

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The significance level of the test is, <em>α</em> = 0.05.

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df = n - 1 = 55 - 1 = 54

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Decision rule:

If the test statistic value is more than the critical value then the null hypothesis will be rejected and vice-versa.

(3)

Compute the test statistic as follows:

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7 0
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8 0
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