Question

Consider the following data:

x | 2 | 3 | 4 | 5 | 6 |

P(X=x) | 0.3 | 0.2 | 0.2 | 0.1 | 0.2 |

Step 1 of 5 : Find the expected value E(X). Round your answer to one decimal place.

Answer #1

X | P(X) | X*P(X) | X² * P(X) |

2 | 0.3 | 0.6 | 1.200 |

3 | 0.2 | 0.6 | 1.800 |

4 | 0.2 | 0.8 | 3.2000 |

5 | 0.1 | 0.5 | 2.5000 |

6 | 0.2 | 1.2000 | 7.2000 |

**expected value = mean = E[X] = Σx*P(X) =
3.70**

**========================**

E [ X² ] = ΣX² * P(X) =
15.9000

variance = E[ X² ] - (E[ X ])² =
2.2100

std dev = √(variance) =
1.4866

Consider the following data:
x
−7
−6
−5
−4
−3
P(X=x)
0.2
0.1
0.2
0.2
0.3
Copy Data
Step 1 of 5:
Find the expected value E(X). Round your answer to one decimal
place.
Step 2 of 5:
Find the variance. Round your answer to one decimal place.
Step 3 of 5:
Find the standard deviation. Round your answer to one decimal
place.
Step 4 of 5:
Find the value of P(X>−5). Round your answer to one decimal
place.
Step...

Consider the following data:
x
4
5
6
7
8
P(X=x)
0.3
0.2
0.1
0.1
0.3
Step 1 of 5 :
Find the expected value E(X). Round your answer to one decimal
place.
Step 2 of 5:
Find the variance. Round your answer to one decimal place.
Step 3 of 5:
Find the standard deviation. Round your answer to one decimal
place.
Step 4 of 5:
Find the value of P(X>4). Round your answer to one decimal
place.
Step 5...

Consider the following data:
x 4 5 6 7 8
P(X=x) 0.1 0.2 0.2 0.3 0.2
Step 1 of 5: Find the expected value E(X). Round your answer to
one decimal place.
Step 2 of 5: Find the variance. Round your answer to one decimal
place.
Step 3 of 5: Find the standard deviation. Round your answer to
one decimal place.
Step 4 of 5: Find the value of P(X>4). Round your answer to
one decimal place.
Step 5 of...

Consider the following data:
x
−4
−3
−2
−1
0
P(X=x)P(X=x)
0.3
0.1
0.1
0.2
0.3
Copy Data
Step 2 of 5 :
Find the variance. Round your answer to one decimal place.

Consider the following data:
x
4
5
6
7
8
P(X=x)
0.2
0.2
0.1
0.2
0.3
Step 3 of 5 :
Find the standard deviation. Round your answer to one decimal
place.

x
−5
−4
−3
−2
−1
P(X=x)
0.2
0.1
0.3
0.1
0.3
Step 3 of 5 :
Find the standard deviation. Round your answer to one decimal
place.
Step 4 of 5 :
Find the value of P(X> ?5). Round your answer to one decimal
place.
Step 5 of 5 :
Find the value of P(X> ?6). Round your answer to one decimal
place.

Consider the following data:
x
3
4
5
6
7
P(X=x)P(X=x)
0.2
.1
.2
.2
0.3
Copy Data
Step 2 of 5:
Find the variance. Round your answer to one decimal place.
Step 3 of 5:
Find the standard deviation. Round your answer to one decimal
place.
Step 4 of 5:
Find the value of P(X>6)P(X>6). Round your answer to one
decimal place.
Step 5 of 5:
Find the value of P(X≤5)P(X≤5). Round your answer to one decimal
place.

Consider the following
data:
x
5
6
7
8
9
P(X=x)P(X=x)
0.30.3
0.1
0.1
0.3
0.2
Copy Data
Step 2 of 5 :
Find the variance.
Round your answer to one decimal place.

x 4 5 6 7 8 P(X=x) 0.3 0.2 0.2 0.1 0.2
Step 2 of 5 : Find the variance. Round your answer to one
decimal place. Answer

Consider the following data:
x
4
5
6
7
8
P(X=x)
0.1
0.1
0.2
0.2
0.4
Find the variance. Round your answer to one decimal place.
Find the standard deviation. Round your answer to one decimal
place.
Find the value of P(X<5). Round your answer to one decimal
place.
Find the value of P(X>7). Round your answer to one decimal
place.

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