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One sample has a mean of and a second sample has a mean of . The two samples are combined into a single set of scores. What is the mean for the combined set if both of the original samples have scores

Answers

Answer 1
Answer:

Answer:

a) For this case we can use the definition of weighted average given by:

M = ( \bar X_1 n_1 + \bar X_2 n_2)/(n_1 +n_2)

And if we replace the values given we have:

M = (8*4 + 16*4)/(4+4)= 12

b) M = (8*3 + 16*5)/(3+5)= 13

c) M = (8*5 + 16*3)/(5+3)= 11

Step-by-step explanation:

Assuming the following question: "One sample has a mean of M=8 and a second sample has a mean of M=16 . The two samples are combined into a single set of scores.

a) What is the mean for the combined set if both of the original samples have n=4 scores"

For this case we can use the definition of weighted average given by:

M = ( \bar X_1 n_1 + \bar X_2 n_2)/(n_1 +n_2)

And if we replace the values given we have:

M = (8*4 + 16*4)/(4+4)= 12

b) what is the mean for the combined set if the first sample has n=3 and the second sample has n=5

Using the definition we have:

M = (8*3 + 16*5)/(3+5)= 13

c) what is the mean for the combined set if the first sample has n=5 and the second sample has n=3

Using the definition we have:

M = (8*5 + 16*3)/(5+3)= 11

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You receive a fax with six bids (in millions of dollars):2.2,1.3,1.9,1.2 2.4 and x is some number that is too blurry to read. Without knowing what x is, the median a. Is 1.9 b. Must be between 1.3 and 2.2 c. Could be any number between 1.2 and 2.4

Answers

Answer:

b. Must be between 1.3 and 2.2

Step-by-step explanation:

The formula for calculating median is :

  1. When n(number of observations in data) is odd = ((n+1)/(2) )^(th) observation
  2. When n is even = (((n)/(2))^(th)obs. + ((n)/(2) + 1)^(th) obs. )/(2)

Since in our data n is even so we use the formula for calculating median

                  =  (((n)/(2))^(th)obs. + ((n)/(2) + 1)^(th) obs. )/(2)

First arranging data in ascending order we get :

     1.2, 1.3, 1.9, 2.2, 2.4 and since we know nothing about our sixth value x so we assume that it may take any position in our data.

Now there may be cases for which position is x on ;

  • If x is the first obs in our data then our median = (3^(rd)obs + 4^(th)obs )/(2) = (1.3+1.9)/(2)  

                                                                                                            = 1.6

  • If x is between 1.2 and 1.3 then also median will be 1.6 .
  • If x is between 1.3 and 1.9 then median will be somewhere between 1.3 and 1.9 .
  • If x is between 1.9 and 2.2 then median will be somewhere between 1.9 and 2.2 .
  • And If x is between 2.2 and 2.4 or after 2.4 then median =  (3^(rd)obs + 4^(th)obs )/(2)

                                                                                         = (1.9+2.2)/(2) = 2.05 .

So from all these observations we conclude that without knowing what x median of data must be between 1.3 and 2.2 .

                                                                                                 

Final answer:

The median of a set of bids can be found by arranging them in numerical order and selecting the middle value.

Explanation:

The median is the middle value of a set of data arranged in numerical order. In this case, we have a set of six bids: 2.2, 1.3, 1.9, 1.2, 2.4, and x (blurred number). To find the median, we first need to arrange the bids in numerical order:

  1. 1.2
  2. 1.3
  3. 1.9
  4. 2.2
  5. 2.4
  6. x

Since there are six bids, the middle value will be the fourth number in the ordered list. Therefore, the median is 2.2.

Learn more about median of bids here:

brainly.com/question/32763192

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Just c
Thank you sm!!!
WILL GIVE BRAINLIEST!!

Answers

1/6??? I’m not sure but I learned it in school lol

HELP WILL MARK BRAINLIEST

Answers

Answer:

(-3,-1)

Step-by-step explanation:

You can graph both of the points on desmos, and then look at the slope from p1 to the midpoint. so you can get the slope, and use it to get the p2. the slope is -4/6. So you get that answer.

PLZZZZ HELP!!!! 520 PTS!!!! BRAINLIEST!!!!Find the value of x to the nearest tenth A. 9 B. 5.7 C. 8.6 D. 26.3

Answers

Answer:

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Step by Step Explanation:

Find the ratio of 4km to 1200m​

Answers

Answer:

10 : 3

Step-by-step explanation:

4km = 4000 m

4000 : 1200 = 4000/1200 = 40/12 = 10/3 = 10 : 3

Answer:

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Differentiating a Logarithmic Function in Exercise, find the derivative of the function. See Examples 1, 2, 3, and 4.y = e^x^2 ln 4x^3

Answers

(d(lnx))/(dx)=(1)/(x)

Answer:

(dy)/(dx)=e^(x^2)((2x^2ln(4x^3)+3)/(x))

Step-by-step explanation:

We are given that a function

y=e^(x^2)ln(4x^3)

We have to differentiate w.r.t x

(dy)/(dx)=e^(x^2)* 2xln(4x^3)+e^(x^2)* (1)/(4x^3)* 12x^2

By using formula

(d(lnx))/(dx)=(1)/(x)

(d(e^x))/(dx)=e^x

(dy)/(dx)=e^(x^2)(2xln(4x^3)+(3)/(x))

(dy)/(dx)=e^(x^2)((2x^2ln(4x^3)+3)/(x))

Hence, the derivative of function

(dy)/(dx)=e^(x^2)((2x^2ln(4x^3)+3)/(x))
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