Question

Suppose that the following table contains the complete probability distribution for the number of credit cards owned by adults in a certain country. Complete parts a and b to the right.

Number_of_Credit_Cards |
Probability |

0 | 0.29 |

1 | 0.26 |

2 | 0.11 |

3 | 0.09 |

4 | 0.08 |

5 | 0.06 |

6 | 0.05 |

7 | 0.03 |

8 | 0.02 |

9 | 0.01 |

a) compute the mean number of credit cards:

b) compute the standard deviation.

Answer #1

The following table contains the probability distribution for
the number of traffic accidents daily in a small town. Complete
parts (a) and (b) to the right. Number of Accidents Daily (X)
P(X) 0 0.30 0.30 1 0.34 0.34 2 0.17 0.17 3 0.08 0.08 4 0.06 0.06 5
0.04 0.04 6 0.01 0.01 b. Compute the standard deviation. sigma σ
equals = nothing (Type an integer or decimal rounded to three
decimal places as needed.)

The following table contains the probability distribution for
the number of traffic accidents daily in a small town. Complete
parts (a) and (b) to the right.
Number of accidents daily (x)
P(X)
0 0.30
1 0.37
2 0.16
3 0.07
4 0.05
5 0.04
6 0.01
a. Compute the mean number of accidents per
day.
b. Compute the standard deviation.

Consider the following proportions regarding age and
type of offence.
Type of Offence
Age (Years)
Violent
Property
Drug
10 – 19
0.02
0.02
0.08
20 – 29
0.05
0.04
0.11
30 – 39
0.04
0.02
0.08
40 – 49
0.03
0.04
0.09
50 – 59
0.04
0.06
0.05
60 – 69
0.01
0.06
0.04
70 – 79
0.01
0.03
0.03
80 – 89
0.00
0.03
0.02
What is the probability of being aged 20 to 29 years?
What is the...

The following table contains the probability distribution for
the number of traffic accidents daily in a small town. Complete
parts (a) and (b) to the right.
Number of Accidents Daily (X)
P(X)
0
0.19
1
0.28
2
0.22
3
0.12
4
0.09
5
0.06
6
0.04
a. Compute the mean number of accidents per day.
μ =1.98 correct
b. Compute the standard deviation.
**** dont know the answer below****
σ =___________
Determine the mean and standard deviation of the variable...

Suppose that the following table contains the number of times a
late night comedian is bleeped on his show. Complete parts a and d
to the right.
Number of Bleeps
(x Subscript
ixi)
P(x Subscript
ixi)
0
0.21
1
0.16
2
0.15
3
0.12
4
0.09
5
0.08
6
0.07
7
0.06
8
0.04
9
0.02
a) What is the probability that the host of the
late night show is bleeped more than 3 times?
P(X>3 bleeps) =
(Round to...

The following table contains the probability distribution for
the number of traffic accidents daily in a small town. Complete
parts (a) and (b) to the right.
Number of Accidents Daily (X)
P(X)
0
0.260
1
0.340
2
0.180
3
0.090
4
0.060
5
0.040
6
0.030
a. Compute the mean number of accidents per day.
μ=1.59
(Type an integer or a decimal.)
b. Compute the standard deviation.
σ=
(Type an integer or decimal rounded to three decimal places as
needed.)

Consider the probability distribution of the discrete random
vector [X,Y] where X represents the number of orders for chickens
in August at neighboring supermarket and Y represents the number of
orders in September. The Joint distribution is showing the
following table.
Y
51
52
53
54
55
51
0.06
0.05
0.05
0.01
0.01
52
0.07
0.05
0.01
0.01
0.01
53
0.05
0.10
0.10
0.05
0.05
54
0.05
0.02
0.01
0.01
0.03
55
0.05
0.06
0.05
0.01
0.03
Find the probability...

A switchboard at some company receives calls following a
probability distribution shown below where the number of calls and
the probability of receiving those calls are recorded.
x 0 1 2 3 4 5 6 7 8 P(x) 0.04 0.05 0.15 0.02 0.28 0.03 0.20 0.11
0.12
x
0
1
2
3
4
5
6
7
8
p(x)
0.04
0.05
0.15
0.02
0.28
0.03
0.20
0.11
0.12
a. Calculate the probability that the switchboard receives:
i. Less than four calls....

The University Secretary wants to determine how University
grade point average, GPA (highest being 4.0) of a sample of
students from the University depends on a student’s high school GPA
(HS), age of a student (A), achievement test score (AS), average
number of lectures skipped each week (S), gender of a student
(where M=1 if a student is male or 0 otherwise), computer or PC
ownership of a student (where PC=1 if a student owns a computer or
0 otherwise),...

1. The following table shows the probability distribution for
the number of television sets per household surveyed.
Complete the table below. For the first three columns, round to
two decimal places. For the last column, round to four decimal
places. (4 points)
x
f(x)
(x)[f(x)]
x– μ
(x–
μ)2
(x –
μ)2f(x)
0
0.03
1
0.32
2
0.26
3
0.21
4
0.13
5
0.05
1.00
Compute the expected value [E(x)] of the number of
television sets per household. (2 points)...

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