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katrin [286]
3 years ago
13

Lucy Baker is analyzing demographic characteristics of two television programs: COPS (population 1) and 60 Minutes (population 2

). Previous studies indicate no difference in the ages of the two audiences. (The mean age of each audience is the same.) Lucy plans to test this hypothesis using a random sample of 100 from each audience.
A) Her alternate hypothesis is __________.
Mathematics
1 answer:
drek231 [11]3 years ago
7 0

Answer and Explanation:

Her alternative hypothesis is that there is some difference between the means of the ages of the audiences of the two television programs. That is, the mean ages of the two audiences are not the same.

If the mean of the ages of the audiences of television programme 1 (COPS) is xbar₁

And the mean of the ages of the audiences of the television programme 2 (60 minutes) is xbar₂

Her alternative hypothesis can be represented mathematically as

xbar₁ - xbar₂ ≠ 0

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ss7ja [257]

50 quarts of 5% butterfat and 1% butterfat milk are to be mixed.

<u>SOLUTION: </u>

First, I will set up my table. I will fill in the unknowns with variables x and y.

The table is attached below

From the table attached below, we can easily set up the two equations.  

<em>Sum of values of two milks = Value of mixture  </em>

0.05x + 0.01y = 3  

For convenience, we'll multiply the entire equation by 100,

5 x + y = 300 ------> (1)  

Now, Sum of amounts of each acid = Amount of mixture  

x + y = 100 ---------> (2)

Subtracting equation (2) from (1),  

( + ) 5 x + y = 300

( − ) x -  y = 100

− − − − − − − −

( = ) 4x + 0y = 200  

Thus, 4x = 200  

x = 50

Substituting x = 50 in (2),

( 50 ) + y = 100  

y  = 100 – 50 = 50  

hence, 50 quarts of 5% butterfat and 1% butterfat milk are to be mixed.

3 0
3 years ago
Find the length of X<br>and show the work. ​
const2013 [10]

Answer:

5.641 = x

Step-by-step explanation:

Work on the right triangle

pythag theorem

9^2 + L^2 = 10^2

L = sqrt 19

then x = 10 - sqrt 19 =5.641

6 0
2 years ago
Please help! I will mark brainliest! :)
ycow [4]

Answer:

11/45

Step-by-step explanation:

Total number of customers:

21+34+83+54+33=225

Number of customers that go 1 or 2 days:

21+34=55

55/225 simplifies to

11/45

when divided by 5

6 0
3 years ago
Four years ago, Alex was twice as old as Jake. Four years from now,Jake will be 3/4 of Alex’s age. How old is Alex?
Vanyuwa [196]

Answer:Four years ago, Alex was twice as old as Jake. Four years from now, Jake will be 3/4 of Alex's age. How old is Alex? - Answer: 12.

Step-by-step explanation:

8 0
3 years ago
Hii please help i’ll give brainliest
brilliants [131]

Answer:

0.5 or 1/2

Step-by-step explanation

I dont know if they want the answer in fraction form.

6 0
3 years ago
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