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Katarina [22]
1 year ago
6

When we make inferences about the difference of two independent population proportions, what assumptions do we need to make? mar

k all that apply.
Mathematics
1 answer:
Elis [28]1 year ago
4 0

When we make inferences about the difference of two independent population proportions, we assume that it is a random sample, and the number of successes and failures are at least 15 in each group.

Two independent proportions tests involve comparing the proportions of two unrelated datasets.

For these two datasets to be regarded as an independent population, the following must be true or assumed to be true

  • The datasets must represent a random sample
  • Each dataset must contain at least 15 successes and failures

Hence, the above highlights are the assumptions of two independent population proportions.

To learn more about independent populations from the given link

brainly.com/question/23989150

#SPJ4

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Nate is watching a baseball game. So far, 15 batters have gotten a hit and 5 batters have not. Out of the next 4 batters, how ma
iren2701 [21]

Answer:

3 batters

Step-by-step explanation:

For the past data, we have observed that:

15 batters have gotten a hit

5 batters have not

The total of batters that we have observed is

n = 15 + 5 = 20

Therefore, this means that based on the observed data, the probability that a batter gets a hit is:

p(hit)=\frac{n(h)}{n}=\frac{15}{20}=0.75

where

n(h) = 15 is the number of batters that got a hit

After that, we want to know how many batters we will expect to get a hit in the next 4 batters. We can write it as:

n(h) = 4 \cdot  p(hit)

And since

p(hit) = 0.75

We find:

n(h)=4\cdot 0.75 =3

So, we expect 3 batters to get a hit in the next 4.

7 0
3 years ago
What are the coordinates of point X?<br> (1,3)<br> (3, -1)<br> (3,1)<br> (-1, -3)
vfiekz [6]
I believe it’s (-3,1) because you count 3 going left starting at the point 0. And since the X-int on the left side is negative that’s why it’s -3. Then you just go up 1 time .
6 0
3 years ago
Read 2 more answers
Im a bit confused with this... any help would be great :(
max2010maxim [7]

Step-by-step explanation

(9).

ΔXYZ ≅ ΔRST

XZ = RS

XZ = 60

RS = 60

(10).

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AC = EC

EC = 56

AC = 56

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BD = GF

BD = 57

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PQ = SQ

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8 0
3 years ago
Students in a random sample of 57 students measured their handspan. The dot plots display the results for the males and females.
Nat2105 [25]

Answer:

There is a difference in mean hand span between male and female if you notice the difference between their averages.    2cm  is quite significant

female mean = 19.6 cm  and male mean = 21.6 cm

Step-by-step explanation:

a.)  There is a significant difference.

take  P( Z  < ( 19.6 - 21.6) / 1)  = P(Z < -2) = 2% probability of assuming that male and female means are the same.  too low to think like that.

b.) Differ by 2cm.  MAD=  Mean Absolute Deviation , MAD within their own data set  seem similar

C.)  The variability in hand spans among male and female are very similar, since they both have the same MAD = 1.0

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3 years ago
The graph shows the approximate median annual earings for five occupations. About how much less does a cook earn than a teller?
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Professor is the median which is 70,000
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