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
Brilliant_brown [7]
2 years ago
10

Statistics please help I'm not good worth 50 points

Mathematics
1 answer:
mina [271]2 years ago
8 0

(a) I can't help you with using your calculator for this part, but if you have some familiarity with your device you can check your answer with mine.

The mean is simply the sum of all the house costs divided by the number of houses:

(75k + 75k + 150k + 155k + 165k + 203k + 750k + 755k)/8 = 291k

So the population mean is $291,000.

The population standard deviation is the square root of the population variance. To get the variance, you take the sum of all the squared differences between the cost and the mean cost, then divide that sum by the number of houses. That is,

[(75k - 291k)² + (75k - 291k)² + … + (755k - 291k)²]/8 = 581,286k

Note that the variances is measured in square dollars. Then the standard deviation is

√(581,286k) ≈ $762,421.1

(b) The median is just the price in the middle. There were 8 houses sold, so there are 2 "middle" prices. The median is the average of these:

(155k + 165k)/2 = 160k = $160,000

(c) Yes, the mode is the data that shows up most frequently. This happens at the lower end, with $75,000 appearing twice.

You might be interested in
HELP WITH 4,5 AND 6 PLZZ
Blababa [14]

Answer:

4) divide, 5) multiply, 5) divide

Step-by-step explanation:

4) you need to divide to determine the length each individual ribbon will be

5) you need to multiply the price of one shirt by three to find the price of three shirts

6) you need to divide the amount of dog food the dog will eat each day by the amount of dog food to see how many days the food will last.

6 0
2 years ago
Weiming, Joyce and Siti divide cookies to sell in a ratio of 5: 12: 9. After Weiming sold 28 cookies, the ratio becomes 1: 8: 6.
Strike441 [17]

Answer:

216 cookies

Step-by-step explanation:

From the question,

Let the total cookies in the first place be x cookies.

Their ratio = 5:12:9

Total  = 5+12+9 = 26.

Weiming share = (5/26)x = 5x/26

If weiming sold 28 cookies

⇒ (5x/26)-28

⇒ (5x-728)/28

Hence Weiming new share = (5x-728)/28 cookies

The new ratio is 1:8:6

The total cookies becomes = x-28

Therefore,

(1/15)(x-28) = (5x-728)/28

(x-28)/15 = (5x-728)/28

Crossmultiply

28(x-28) = 15(5x-728)

28x-784 = 75x-10920

Collect like terms

28x-75x = -10920+784

-47x = -10136

x = -10136/-47

x = 215.7

x ≈ 216 cookies

8 0
3 years ago
Answer ASAP!! Please! Will give brainliest!
ale4655 [162]
This is what you’re looking for !

7 0
2 years ago
Which of the following lines has a negative slope? (Photo Attached)
olga2289 [7]
The answer would be number three because the slope is going towards the bottom of the graph
6 0
3 years ago
Read 2 more answers
What is 12.5% written as a fraction in simplest form
Helga [31]
12.5% goes to .125
so .125 as a fraction is:
\frac{1}{8}
7 0
3 years ago
Read 2 more answers
Other questions:
  • Write three numbers greater than 20 that have 9 as factor
    5·2 answers
  • 180-(3x-10) simplify this
    15·2 answers
  • *PLEASE HELP TRYING TO MAKE HONOR ROLL*
    12·1 answer
  • Find all pairs of natural numbers which can be the solution to the equation a+b=42.
    5·1 answer
  • Hey i need help with these and i’ll mark you brainliest
    8·1 answer
  • Which of the following is not the same as postive 7​
    14·1 answer
  • An account is opened with an initial deposit of \$3,000 and earns 4.1\% interest compounded quarterly What the account worth in
    5·1 answer
  • a random sample of size 100 is taken from a population described by the proportion P equals 0.60 using the appropriate normal tr
    13·1 answer
  • Please solve for me ​
    6·1 answer
  • I don't understand what question b) i) is asking me to do?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!