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ad-work [718]
3 years ago
15

Which of the following is a disadvantage of a personal

Mathematics
1 answer:
s344n2d4d5 [400]3 years ago
3 0
Try B, correct me if I’m wrong please
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A golfer keeps track of his score for playing nine holes of golf​ (half a normal golf​ round). His mean score is 8080 with a sta
solniwko [45]

Answer:

Therefore the mean and standard deviation of his total score if he plays a full 18 holes are 160 and 11\sqrt2 respectively.

Step-by-step explanation:

Given that,

For the first 9 holes X:

E(X) = 80

SD(X)=13

For the second 9 holes Y:

E(Y) = 80

SD(Y)=13

For the sum W=X+Y, the following properties holds for means , variance and standard deviation :

E(W)=E(X)+E(Y)

     and

V(W)=V(X)+V(Y)

⇒SD²(W)=SD²(X)+SD²(Y)        [ Variance = (standard deviation)²]

\Rightarrow SD(W)=\sqrt{SD^2(X)+SD^2(Y)}

∴E(W)=E(X)+E(Y) = 80 +80=160

            and

∴SD(W)=\sqrt{SD^2(X)+SD^2(Y)}

              =\sqrt{11^2+11^2}

               =\sqrt{2.11^2}

               =11\sqrt2

Therefore the mean and standard deviation of his total score if he plays a full 18 holes are 160 and 11\sqrt2 respectively.

                                               

4 0
3 years ago
The value of the expression is?
olga_2 [115]

Answer:

24

Step-by-step explanation:

u can do mental math or use a calculator

6 0
2 years ago
Read 2 more answers
The store rents wigs by the hour. He spent $40 to rent a wig for 8 hours. Write an equation to represent the relationship.
Vlada [557]

40 divided by 8 = 5

Mark Me Brainliest Please

8 0
2 years ago
Hillside Elementary ordered 40 pizzas for
Whitepunk [10]

Answer:

28 pizzas eaten

Step-by-step explanation:

1) estimate each number, i will take 3 1/4 as 3

5 3/4 as 6

and

2 3/4 as 3

2) combine the total number of pizzas left over:

3+6+3=12

subtract the number of pizzas left over from the total ordered:

40-12=28

6 0
3 years ago
Can someone please help
photoshop1234 [79]

Answer:

What is your question?

Step-by-step explanation:

8 0
3 years ago
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