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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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CAN SOMEBODY PLEASE HELP ME!!!!!!!!!!
lana66690 [7]

The answers to the blanks are

1. 600,

2. 120,

3. 120,

4. 180.

Explanation:

  • The fence means perimeter around the court. So a tennis court's perimeter is 600 feet fence. The perimeter of a rectangle is 2 times the sum of the rectangle's length and the rectangle's width.
  • It is given that length equals 60 more than width i.e. l = w + 60, where l is the length of the court and w is the width of the court.
  • The perimeter of a court = 600 = 2 (l + w) = 2l + 2w = 2 (w +60) + 2w,                                                                                                     this becomes, 2w + 120 + 2w = 600; 4w = 480, w = 120.
  • Since l = w + 60, l = 120 + 60 = 180. So length of a court is 180 feet and the width of a court is 120 feet.

6 0
3 years ago
If you shift the quadratic parent function, f(x)=x^2, right 10 units, what is the equation of the new function?
ololo11 [35]
F(x)=(x-10)^2 

Right is negative
Left is positive

Remember that - those become handy later on. Try to become really good at transformations!

Good luck!
8 0
4 years ago
Read 2 more answers
Graph the solution to the following linear inequality in the coordinate plane.
slavikrds [6]

Answer:

Hope this helps, happy november <3

Step-by-step explanation:

8 0
3 years ago
The production possibilities curve may shift outward as a result of a(n)
Fynjy0 [20]
Statements A, B, C, and E will all cause shift of production possibilities curve outwards. This is because:

Statement A: Training of workers will mean improved skills and knowledge. This will in turn lead to increased productivity and may lead to efficiency and thus increased production.

Statement B: Decrease in cost of production will lead to production of more goods and thus the curve will shift outwards.

Statement C: Increase in short-run aggregate supply may mean supply of more raw materials to the production thus increased productivity.

Statement D: Increase in customer spending will mean increased demand and thus leads to shifting in supply. This leads to increased production.<span />
6 0
3 years ago
Need help will mark brainliest...
Xelga [282]

Answer:

Step-by-step explanation:

Step-by-step explanation:

The given data set is:

Week 1: 600

Week 2: 300

Week 3: 500

Week 4: 900

The following are the steps to find the standard deviation:

Step 1. Jim enters the data and calculates the average or mean.

Step 2. Jim calculates the deviation from the mean by subtracting the mean from each value.

Data value (x)                                                              

600                                                                           25

300                                                                         -275

500                                                                         -75

900                                                                          325

Step 3. Jim squares each deviation to remove negative signs.

Data value (x)                                                            

600                                                                       625

300                                                                    75625

500                                                                      5625

900                                                                   105625

Step 4. Jim sums the squares of each deviation and divides by the count for the variance.

Step 5.Jim takes the square root of the variance to find the standard deviation.

4 0
3 years ago
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