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Klio2033 [76]
3 years ago
13

Suppose we are testing the null hypothesis H 0 mu=20 and the alternative H iu =20 , normal population with sigma=6 A random samp

le of nine observations are drawn from the population, and we find the sample mean of these observations x = 17 The value of the test statistic z is approximatel
Mathematics
1 answer:
cupoosta [38]3 years ago
8 0

Answer:

The value of the test statistic is z = -1.5

Step-by-step explanation:

The formula for the test statistic is:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

In which X is the statistic, \mu is the mean, \sigma is the standard deviation and n is the number of observations.

In this problem, we have that:

\mu = 20, X = 17, \sigma = 6, n = 9

So

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

z = \frac{17 - 20}{\frac{6}{\sqrt{3}}}

z = -1.5

The value of the test statistic is z = -1.5

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Answer:

True

Step-by-step explanation:

The variable overhead rate variance refers to the difference in two variables.

The Variables are

1. The actual variable manufacturing overhead

2. The expected variable overhead given the number of hours worked

Labor rate variance is evaluated by

AH(AR - SR)

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The variable overhead rate variance is also calculated the same way except that it replaces the direct labor rates with variable overhead rates

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3 years ago
You can set up a proportion:
nadya68 [22]

Answer:

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Step-by-step explanation:

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3 years ago
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7 0
3 years ago
Can someone explain 15-20? I really need help and it's due tomorrow. Thank you in advance!
zubka84 [21]
15-20 is -5. If you put 15 on a number line and go back twenty spaces you land on -5 hope this helps.
7 0
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Read 2 more answers
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