1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ryzh [129]
3 years ago
9

The IRS was interested in the number of individual tax forms prepared by small accounting firms. The IRS randomly sampled 50 pub

lic accounting firms with 10 or fewer employees in the Dallas-Fort Worth area. The following frequency table reports the results of the study. Estimate the mean and the standard deviation.
Number of Clients

Frequency

20 up to 30

1

30 up to 40

15

40 up to 50

22

50 up to 60

8

60 up to 70

4
Mathematics
1 answer:
lawyer [7]3 years ago
4 0

Answer:

44.80

9.27

Step-by-step explanation:

From the data:

Midpoint (x) : __ 25 _ 35 _ 45 _ 55 _ 65

Frequency (f) : _ 1 __ 15 __ 22 _ 8 __ 4

The mean (m):

Σfx / Σf

[(25 * 1) + (35* 15) + (45 * 22) + (55 * 8) + (65 * 4)] / (1 + 15 + 22 + 8 + 4)

= 2240 / 50

= 44.80

Standard deviation :

Sqrt[(Σ(X² * f) / Σf) - m²)]

[(25^2 * 1) + (35^2 * 15) + (45^2 * 22) + (55^2 * 8) + (65^2 * 4)] / (1 + 15 + 22 + 8 + 4)

(104650 / 50) - (44.80²)

1908.51 - 44.80^2

2093 - 2007.04

Sqrt(85.96)

= 9.27

You might be interested in
Someone please finish and explain this! i'm giving brainliest, tysm :)
posledela

Answer:

Step-by-step explanation:

   Hours: 1      5         10      15      20         25

Minutes: 60   300   600   900   1,200     1,500

These show proportional relationship because they are all times hour by 60 minutes and the hours go by 5 hours, each.

6 0
3 years ago
A square has 14.4 in what is the length of each of the sides
solong [7]

3.6 in

When finding the perimeter, you divide the perimeter by the # of sides on the shape. In this case you would divide 14.4 by 4 because it's a square. Hope this helps.

5 0
4 years ago
Pls help !!!!!!!!!!!!!!!!!!
Mashutka [201]
Maybe the answer is B
4 0
3 years ago
HELP I WILL MARK BRAINLYEST HELPPP PLZ
Delicious77 [7]

Answer:

4. 81

5. 99

6. 1

7. 484

8. 128

9. 81

4 0
3 years ago
Radius = ?<br> Diameter = 62 ft
mixer [17]

Answer:

None of the above

Step-by-step explanation:

The radius is the straight line from the center of the circle to the edge of the circle. The diameter is the straight line that goes from one edge to the other edge.

Therefore, the radius is half of the diameter, or

r=d/2

We know the diameter is 62 feet. Substitute 62 in for d.

r=62/2

r=31

The radius is 31 feet. This is not an option given, so the correct answer is none of the above.

5 0
3 years ago
Read 2 more answers
Other questions:
  • Above are two different models of the same diamond-shaped platform. If the length of side a is 3 cm, what is the length of side
    12·2 answers
  • Write a mathematical expression for the phrase "5 times the sum of 3x and 4.
    5·2 answers
  • Winnie collect the tabs from cans to recycle his goal is to collect 500 tabs one month collect 217 how many more does Winnie nee
    14·2 answers
  • Cassie has 1/2 pound of sugar in her cabinet her cake recipe calls for 2/10 of a pound of sugar how many cakes can she make show
    13·1 answer
  • Kayla's mother sent her to the store. If on a map Kayla's house is at (6,-5) and the store
    10·1 answer
  • Ella and three friends run in
    14·1 answer
  • A = 3d <br>work out the value of 'a' when , d= 5​
    5·2 answers
  • It is reported in USA Today that the average flight cost nationwide is $445.99. You have never paid close to that amount and you
    10·1 answer
  • Which expression is equivalent to<br> (5^-2)(5^-1)<br> A. -1/125<br> B. -1/5<br> C. 1/125<br> D. 1/5
    8·1 answer
  • A sphere has a radius of 7.5cm<br> to the nearest centimeter (cm) what is the volume of the sphere?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!