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docker41 [41]
3 years ago
13

In a random sample of 97 women at a company, the mean salary is $45,902 with a standard deviation of $3865. In a random sample o

f 75 men at the company, the mean salary is $48,454 with a standard deviation of $6677. Which interval is the 95% confidence interval for the difference between the mean salaries of all women and men at the company?
A) ($1133.20, $3970.80)
B) ($856.36, $4247.64)
C) ($1686.88, $3417.12)
D) ($319.99, $4784.01)
Mathematics
1 answer:
Delicious77 [7]3 years ago
8 0

Answer:

c

Step-by-step explanation:


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About 2% of the population has a particular genetic mutation. 1000 people are randomly selected. Find the mean for the number of
Alla [95]

Answer:

Step-by-step explanation:

We khow that the genetic mutation affect 2 percent of the population .

Let's try to understand what does this mean :

  • in a group of 100 people there is possibility of finding 2 people with this genetic mutation
  • in a group of 1000 the possibility raises to 20 people so we can deduce that each time we add a zero we add a zero in 2

so :

  • 100⇒2
  • 1000⇒20
  • 10000⇒200
  • 100000⇒2000

and so on

6 0
3 years ago
Solve the equation 3(4 + 3r)
sertanlavr [38]

The answer is 12+3r because 4 times 3=12 then the 3r which you cannot add because they are no others variables that are r

5 0
2 years ago
1. Use a piece of wool, thread or chord to measure the circumference of each of the circles found on the last page. To do this j
spayn [35]

Answer:

just doing this for my points!!! lol

Step-by-step explanation:

6 0
2 years ago
20 square root of 270 /4 square root of 3
OleMash [197]

Answer:

<u>The most simplified form is 15√10</u>

Step-by-step explanation:

1. Let's simplify the expression:

20√270 ÷ 4√3

20√9 * 30/  4√3 (√270 = √9 * 30)

60 √30/ 4√3

(60 √3 * √10) / 4√3 (√30 = √3 * √10)

60/4 √10 ( We cancel √3 in the numerator and in the denominator)

15√10

<u>The most simplified form is 15√10</u>

6 0
3 years ago
Solve the equation <br> y-x=17<br> y=4x+2
gogolik [260]
Y-x =17
y = -x + 17

substitute this into the second equation

y = 4x + 2
-x + 17 = 4x + 2
0= 5x -15
15/5 = 5x/5
3 = x
4 0
2 years ago
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