Question

The speed with which utility companies can resolve problems is very important. The Georgetown Telephone Company (GTC), reports that it can resolve customer problems the same day they are reported in 67% of the cases. Suppose that the 23 cases reported today are representative of all complaints. a-1. How many of the problems would you expect to be resolved today? (Round the final answer to 2 decimal places.) Number of Problems a-2. What is the standard deviation? (Round the final answer to 4 decimal places.) Standard Deviation b. What is the probability that 18 of the problems can be resolved today? (Round the final answer to 4 decimal places.) Probability c. What is the probability that 18 or 19 of the problems can be resolved today? (Round the final answer to 4 decimal places.) Probability d. What is the probability that more than 18 of the problems can be resolved today? (Round the final answer to 4 decimal places.) Probability

statsistics

Answer #1

here this is binomial with parameter n=23 and
p=0.67 |

a-1_)

mean E(x)=μ=np=15.41 |

a-2)

standard deviation σ=√(np(1-p))=2.2551 |

b()

P(X=18)= |
(_{n}C_{x})p^{x}(1−p)^{(n-x) }
= |
0.0975 |

if using ti-84 use commannd :binompdf(23,0.67,18) |

if using excel use commannd :binomdist(18,23,0.67,false) |

c)

P(18<=X<=19)= |
∑_{x=a}^{b }
(_{n}C_{x})p^{x}(1−p)^{(n-x) }
= |
0.1496 |

if using ti-84 use commannd :binomcdf(23,0.67,19)-binomcdf(23,0.67,17) |

if using excel use commannd :binomdist(19,23,0.67,true)-binomdist(17,23,0.67,true) |

d)

P(X>=19)=1-P(X<=18)= |
1-∑_{x=0}^{x-1 }
(_{n}C_{x})p^{x}(q)^{(n-x)} = |
0.0806 |

if using ti-84 use commannd :1-binomcdf(23,0.67,18) |

if using excel use commannd :1-binomdist(18,23,0.67,true) |

he speed with which utility companies can resolve problems is
very important. The Georgetown Telephone Company (GTC), reports
that it can resolve customer problems the same day they are
reported in 67% of the cases. Suppose that the 23 cases reported
today are representative of all complaints. a-1. How many of the
problems would you expect to be resolved today? (Round the final
answer to 2 decimal places.) Number of Problems a-2. What is the
standard deviation? (Round the final...

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The speed with which utility companies can resolve problems is
very important. The Georgetown Telephone Company (GTC), reports
that it can resolve customer problems the same day they are
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places.)
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very important. GTC, the Georgetown Telephone Company, reports it
can resolve customer problems the same day they are reported in 70%
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places.) a-2. What is the standard deviation? (Round your answer to
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The speed with which utility companies can resolve problems is
very important. GTC, the Georgetown Telephone Company, reports it
can resolve customer problems the same day they are reported in 80%
of the cases. Suppose the 15 cases reported today are
representative of all complaints.
a-1. How many of problems would you expect to
be resolved today? (Round your answer to 2 decimal
places.)
a-2. What is the standard deviation?
(Round your answer to 4 decimal places.)
What is the...

The speed with which utility companies can resolve problems is
very important. GTC, the Georgetown Telephone Company, reports it
can resolve customer problems the same day they are reported in 66%
of the cases. Suppose the 16 cases reported today are
representative of all complaints.
a-1.
How many of the problems would you expect to be resolved today?
(Round your answer to 2 decimal places.)
Number of Problems
a-2.
What is the standard deviation? (Round your answer to...

The speed with which utility companies can resolve problems is
very important. GTC, the Georgetown Telephone Company, reports it
can resolve customer problems the same day they are reported in 80%
of the cases. Suppose the 15 cases reported today are
representative of all complaints.
a. How many of problems would you expect to be
resolved today? (Round your answer to 2 decimal
places.)
b. What is the standard deviation
(Round your answer to 4 decimal places.)
c. What is...

The speed with which utility companies can resolve problems is
very important. GTC, the Georgetown Telephone Company, reports it
can resolve customer problems the same day they are reported in 75%
of the cases. Suppose the 13 cases reported today are
representative of all complaints.
How many of the problems would you expect to be resolved today?
(Round your answer to 2 decimal places.)
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decimal places.)
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The speed with which utility companies can resolve problems is
very important. GTC, the Georgetown Telephone Company, reports it
can resolve customer problems the same day they are reported in 80%
of the cases. Suppose the 15 cases reported today are
representative of all complaints.
a-1. How many of problems would you expect to
be resolved today? (Round your answer to 2 decimal
places.)
a-2. What is the standard deviation?
(Round your answer to 4 decimal places.)
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The speed with which utility companies can resolve problems is
very important. GTC, the Georgetown Telephone Company, reports it
can resolve customer problems the same day they are reported in 70%
of the cases. Suppose the 14 cases reported today are
representative of all complaints.
a-1. How many of problems would you expect to
be resolved today? (Round your answer to 2 decimal
places.)
a-2. What is the standard deviation?
(Round your answer to 4 decimal places.)
What is the...

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