2 years ago

A farmer harvested 21 1/4

Mathematics

1 answer:

Oxana [17]2 years ago

8 0

Answer:

and sold it for 26 rupesz m*********d

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An emergency room (ER) nurse noticed that there are an unusually high number of motor-vehicle accident injuries in the month of

Dmitrij [34]

4800 patients

Step-by-step explanation:

120 of 1000 means 12%

12% of 40000 is 4800

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3 years ago

Which function in Excel is used to perform a test of independence? a. T.TEST b. CHISQ.TEST c. NORM.S.DIST d. Z.TEST

denis23 [38]

Answer:

b. CHISQ.TEST

Step-by-step explanation:

Notation and previous concepts

A chi-square test is "used to test if the variance of a population is equal to a specified value. This test can be either a two-sided test or a one-sided test. The two-sided version tests against the alternative that the true variance is either less than or greater than the specified value"

The statistic is given by:

$\chi^2 = \sum_{i=1}^n \frac{(O_i-E_i)^2}{E_i}$

In order to calculate the p value we need to have in count the degrees of freedom , on this case $df=(rows-1)(#cols-1)$ . And we can calculate the p value would be given by: