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Anastaziya [24]
3 years ago
15

a bag has 5 yellow marbles, 3 red marbles, and 2 blue marbles. Quincy randomly picks a marble from the bag and returns it before

another is picked. How many times would quincy expect to get a blue marble if he chose marbles 200 times?
Mathematics
1 answer:
Sidana [21]3 years ago
8 0

Answer:

40

Step-by-step explanation:

2/10 are blue

so we need to find out 2/10's of 200

so in your calculator multiply 200 by 2/10

you get 40

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Flip a coin 10 times and record the observed number of heads and tails. For example, with 10 flips one might get 6 heads and 4 t
zepelin [54]

Answer:

The greater the sample size the better is the estimation. A large sample leads to a more accurate result.

Step-by-step explanation:

Consider the table representing the number of heads and tails for all the number of tosses:

Number of tosses    n (HEADS)        n (TAILS)            Ratio

            10                         3                      7                    3 : 7

           30                         14                    16                   7 : 8

          100                        60                   40                  3 : 2

Compute probability of heads for the tosses as follows:

  • n = 10 tosses

        P(\text{HEADS})=\frac{3}{10}=0.30

The probability of heads in case of 10 tosses of a coin is -0.20 away from 50/50.

  • n = 30 tosses

        P(\text{HEADS})=\frac{14}{30}=0.467

The probability of heads in case of 30 tosses of a coin is -0.033 away from 50/50.

  • n = 100 tosses

        P(\text{HEADS})=\frac{60}{100}=0.60

The probability of heads in case of 100 tosses of a coin is 0.10 away from 50/50.

As it can be seen from the above explanation, that as the sample size is increasing the distance between the expected and observed proportion is decreasing.

This happens because, the greater the sample size the better is the estimation. A large sample leads to a more accurate result.

5 0
3 years ago
if sec theta equals negative 5/3, such that 180° <thata<270° then determine what is tan theta ?
Svetllana [295]
I hope this makes sense, if not please feel free to let me know and I'll explain it. 

4 0
3 years ago
X+56<533. What is the solution of the inequality?
swat32
X<477


hope this helps<3
7 0
3 years ago
Represent each fraction on the number line <br><br> 0————1
Akimi4 [234]
The answers are 1/5,2/5,3/5,and 4/5
5 0
4 years ago
In an area of the Midwest, records were kept on the relationship between the rainfall (in inches) and the yield of wheat (bushel
dusya [7]

Answer:

The correct answer is 36.2

Step-by-step explanation:

Hello!

Given the data:

Rainfall(inch) x: 10.5, 8.8, 13.4, 12.5, 18.8, 10.3, 7.0, 15.6, 16.0

Yield (bushels per acre) y: 50.5, 46.2, 58.8, 59.0, 82.4, 49.2, 31.9, 76.0, 78.8

The response variable is

Y: Yield of wheat (bushels per acre)

Explanatory variable:

X: Rainfall in a certain period (inch)

I've calculated the equation of regression using a statistics software, the estimated equation is:

^Y= 4.27 + 4.38X

To calculate the value that will take the response variable for a given value of X:

^Y= 4.27 + 4.38*7.3= 36.24 bushels per acre.

I hope it helps!

5 0
3 years ago
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