The random variable X is the crew size of a randomly selected shuttle mission. Its probability distribution is shown below. Complete parts a through c.   x 2 4 5 6 7 8   ​P(X=​x) 0.028 0.031 0.319 0.258 0.358 0.006     The mean is____.The​ one-standard-deviation interval is___,___the​ two-standard-deviation interval is___,___and the​ three-standard-deviation interval is____,____. ​(Type integers or decimals rounded to three decimal places as needed. Use ascending​ order.)

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The random variable X is the crew size of a randomly selected shuttle mission. Its probability distribution is shown below. Complete parts a through c.
 
x
2
4
5
6
7
8
 
​P(X=​x)
0.028
0.031
0.319
0.258
0.358
0.006
 
 
The mean is____.The​ one-standard-deviation interval is___,___the​ two-standard-deviation interval is___,___and the​ three-standard-deviation interval is____,____.
​(Type integers or decimals rounded to three decimal places as needed. Use ascending​ order.)
The accompanying table provides a probability distribution for the number of major hurricanes, Y, for a randomly selected year between 1851 and 2012. Complete parts (a) through
(c) below.
Click the icon to view the distribution of hurricanes.
a. Find and interpret the mean of the random variable.
(Round to three decimal places as needed.)
- X
Distribution of Major Hurricanes
y
P(Y = y)
y
P(Y = y)
0.183
0.045
1
0.284
0.025
2
0.228
7
0.012
3
0.073
0.108
4
0.042
Print
Done
Enter your answer in the answer box and then click Che
N CO
Transcribed Image Text:The accompanying table provides a probability distribution for the number of major hurricanes, Y, for a randomly selected year between 1851 and 2012. Complete parts (a) through (c) below. Click the icon to view the distribution of hurricanes. a. Find and interpret the mean of the random variable. (Round to three decimal places as needed.) - X Distribution of Major Hurricanes y P(Y = y) y P(Y = y) 0.183 0.045 1 0.284 0.025 2 0.228 7 0.012 3 0.073 0.108 4 0.042 Print Done Enter your answer in the answer box and then click Che N CO
A census collected data on everyone that lived in a certain small town. The random variable X is the number of girls out of four children born to a randomly selected couple in that
town. Its probability distribution is shown below. Complete parts a through c.
sto
X
1
2
3
4
P(X = x)
0.0522
0.2499
0.3489
0.2801
0.0689
a. Find and interpret the mean of the random variable.
|(Round to four decimal places as needed.)
Transcribed Image Text:A census collected data on everyone that lived in a certain small town. The random variable X is the number of girls out of four children born to a randomly selected couple in that town. Its probability distribution is shown below. Complete parts a through c. sto X 1 2 3 4 P(X = x) 0.0522 0.2499 0.3489 0.2801 0.0689 a. Find and interpret the mean of the random variable. |(Round to four decimal places as needed.)
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