elizaannettem4466

20.12.2019 • 

Mathematics

Suppose that college faculty with the rank of professor at two year institutions earn an average of $52,500 per year with a standard deviation of $4,000. in an attempt to verify this salary level, a random sample of 60 professors was selected from a personnel database for all two-year instituations in the united states

c) calculate the probability the sample mean x-bar is greater than $55,000.

d) if you drew a random sample with the mean $55,000 would you consider this sample unusual? what conclusions might you draw?

Ответ:

aaron2113

13.01.2022

Mathematics

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Let x be a random variable representing the mean saraly of professors at two year institutions, then
P(x > 55000) = 1 - P(z < (55000 - 52500)/4000) = 1 - P(z < 0.625) = 1 - 0.73401 = 0.26599

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Ответ:

hannah1699

03.04.2022

Mathematics

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T is 5,2

Step-by-step explanation:

The change in x is from  1 to 7        6 units

The change in y is from 4 to 1       -3 units

 

A RATIO of 2:1 means the line is divided into three segments (2+1)

  We want two of those segments from endpoint D  

 

 

6 units* 2/3     added to the x value of 1 = x=5

-3 units * 2/3    added to the y value of 4 = y = 2

Hence, T is 5,2.

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