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Genrish500 [490]
3 years ago
13

A study was conducted to determine if the salaries of firefighters from two neighboring cities were different. A sample of 75 fi

refighters from each city was randomly selected. The mean from the first city was $38,200 with a population standard deviation of $3100. The mean from the second city was $40,150 with a population standard deviation of $3300. Construct a 99% confidence interval for μ1 - μ2.
Mathematics
1 answer:
Allushta [10]3 years ago
3 0
We would find the mean average of the two means given.The given are:M1=38200SD1= 3100M2= 40150SD2=3300
Given the formula input the values and the result is Cohen's d = .61Thank you for your question. Please don't hesitate to ask in Brainly your queries. 
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Answer:

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Step-by-step explanation:

15+-7=8 and 15--7=22

15+-7 so take the negative and take out that mush of the big number

15-7=8

15--7= the subtracting beside a negative makes it changes to positive and addition so 15+7=22

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4 years ago
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Step-by-step explanation:

Since all coefficients are integers, we can apply the rational zeros theorem.

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7 0
2 years ago
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Step-by-step explanation:

The slope of a line characterizes the direction of a line. To find the slope, you divide the difference of the y-coordinates of 2 points on a line by the difference of the x-coordinates of those same 2 points .

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3 years ago
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Alex73 [517]

Answer:

Step-by-step explanation:

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b.

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alexgriva [62]

Answer:

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Step-by-step explanation:

3/4 times 7 or 7/1

8 0
3 years ago
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