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azamat
3 years ago
11

Suppose a baseball player had 229 hits in a season. In the given probability distribution, the random variable x represents the

number of hits the player obtained in a game. Round one decimal place. show work.
x...........0......1......2......3......4......5

P(x)..0.1712...0.4886....0.2389....0.0706.....0.0256.......0.0051

a.) Compute and interpret the mean of the random variable x

?x =

Which of the following interpretations is correct?

1.) As the number of trials n decreases, the mean of the observations will approach the mean of the random variable.

2.) As the number of trials n increases, the mean of the observations will approach the mean of the random variable.

3.) The observed value of the random variable will almost always be less than the mean of the random variable.

4.) The observed value of the random variable will almost always be equal to the mean of the random variable.

b.) Compute the standard deviation of the random variable x.

?x =
Mathematics
1 answer:
Andru [333]3 years ago
8 0

Answer:

a) summation of p(x)/n ie. (0.1712+...+0.0051)/6=0.16675

b)1

c).var=summation (x-mean) squared /n ie (0.1712-0.16675)squared +...+(0.0051-0.16675)squared/n=0.027351948

SD =square root of variance =0.16538

Step-by-step explanation:

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Sal is making bracelets for a fundraiser he uses 6 inches of yarn per bracelet how many bracelets can sal make with 5 feet of ya
natali 33 [55]
There are 12 inches in 1 foot, and each bracelet takes 6 inches
12 divided by 6 = 2
there can be 2 bracelets per foot of yarn
5 x 2 = 10 bracelets can be made
let me know if you have any further questions
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3 0
3 years ago
Read 2 more answers
Is it right
Rasek [7]
F(t) = t2 + 4t − 14

 

y + 14 + 4 = ( t2 + 4t +4)

y + 18 = ( t + 2)^2

 

so the vertex of the parabola is ( -2 , -18)

 

<span>the axis of symmetry is y = -18</span>

8 0
3 years ago
Assume the upper arm length of males over 20 years old in the United States is approximately Normal with mean 39.2 centimeters (
MAVERICK [17]

Answer:

The interval [32.6 cm, 45.8 cm]

Step-by-step explanation:

According with the <em>68–95–99.7 rule for the Normal distribution:</em>  If \large \bar x  is the mean of the distribution and s the standard deviation, around 68% of the data must fall in the interval

\large [\bar x - s, \bar x +s]

around 95% of the data must fall in the interval

\large [\bar x -2s, \bar x +2s] 

around 99.7% of the data must fall in the interval

\large [\bar x -3s, \bar x +3s]

So, the range of lengths that covers almost all the data (99.7%) is the interval

[39.2 - 3*2.2, 39.2 + 3*2.2] = [32.6, 45.8]

<em>This means that if we measure the upper arm length of a male over 20 years old in the United States, the probability that the length is between 32.6 cm and 45.8 cm is 99.7%</em>

3 0
3 years ago
Which expression is equivalent to 3^4x3^-9<br><br>​
WARRIOR [948]

i really hope this helps

7 0
3 years ago
Help please! There are 3 items in an order. They cost $8.95, $11.49, and $12.75. The sales tax for this order is 6.5%.
vredina [299]

Answer: $35.35

Step-by-step explanation:

Facts

3 items

item 1: 8.95

item 2: 11.49

item 3: 12.75

6.5% sales tax

Step 1: Find the total cost of the items ,before tax

8.95+11.49+12.75= 33.19

Step 2: Apply the sales tax

6.5% of 33.19 = 2.15735 --> approximatley $2.16

Step 3: Add the sales tax amount to the total cost of the items to find the final total cost.

$33.19+$2.16= $35.35  

Hence the answer is B

Hope this helps !! :)) And brainliest would be appreciated

3 0
2 years ago
Read 2 more answers
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