Question
In: Statistics and Probability
A cellphone provider has the business objective of wanting to estimate the proportion of subscribers who...
A cellphone provider has the business objective of wanting to estimate the proportion of subscribers who would upgrade to a new cellphone with improved features if it were made available at a substantially reduced cost. Data are collected from a random sample of 500 subscribers. The results indicate that 135 of the subscribers would upgrade to a new cellphone at a reduced cost.
a. at the 0.05 level of significance, is there evidence that more than 20% of the customers would upgrade to a new cellphone at a reduced cost?
b. How would the manager in charge of promotional programs concerning residential customers use the results in (a)?
Solutions
orchestra answered 1 year agoRelated Solutions
A cellphone provider has the business objective of wanting to estimate the proportion of subscribers who...
A cellphone provider has the business objective of wanting to
estimate the proportion of subscribers who would upgrade to a new
cellphone with improved features if it were made available at a
substantially reduced cost. Data are collected from a random sample
of 500 subscribers.
The results indicate that 110 of the subscribers would upgrade
to a new cellphone at a reduced cost. Complete parts (a) and (b)
below.
a. Construct a 95% confidence interval estimate for the
population proportion...
A Cellphone provider has the business objective of wanting to estimate the proportion of subscribers who...
A Cellphone provider has the business objective of wanting to
estimate the proportion of subscribers who would upgrade to a new
cellphone with improved features if it were made available at a
substantially reduced cost. Data are collected from a random sample
of 500 subscribers. The result indicate that 135 of the subscribers
would upgrade to a new cellphone at a reduced cost.
a. Construct a 99% confidence interval estimate for the
population proportion of subscribers that would upgrade to...
A cellphone provider has the business objective of wanting to estimate the proportion of subscribers who...
A cellphone provider has the business objective of wanting to
estimate the proportion of subscribers who would upgrade to a new
cellphone with improved features if it were made available at a
substantially reduced cost. Data are collected from a random sample
of 500 subscribers. The results indicate that 135 of the
subscribers would upgrade to a new cellphone at a reduced
cost.
a. Construct a 99% confidence interval estimate for the population
proportion of subscribers that would upgrade to...
6. A cellphone provider has the business objective of wanting to estimate the proportion of subscribers...
6. A cellphone provider has the business objective of wanting to
estimate the proportion of subscribers who would upgrade to a new
cellphone with improved features if it were made available at a
substantially reduced cost. Data are collected from a random sample
of 500 subscribers. The results indicate that 135 of the
subscribers would upgrade to a new cellphone at a reduced cost.
a. Construct a 99% confidence interval estimate for the
population proportion of subscribers that would upgrade...
6. A cellphone provider has the business objective of wanting to estimate the proportion of subscribers...
6. A cellphone provider has the business objective of wanting to
estimate the proportion of subscribers who would upgrade to a new
cellphone with improved features if it were made available at a
substantially reduced cost. Data are collected from a random sample
of 500 subscribers. The results indicate that 135 of the
subscribers would upgrade to a new cellphone at a reduced cost.
a. Construct a 99% confidence interval estimate for the
population proportion of subscribers that would upgrade...
Is there a difference in the variance of the satisfaction rating of traditional cellphone provider who...
Is there a difference in the variance of the satisfaction rating
of traditional cellphone provider who bill for service at the end
of a month (often under a contract) and prepaid cellphone service
providers who bill in advance without a contract? The table below
contains the satisfaction rating for 10 traditional cellphone
providers and 13 prepaid cellphone service.
CellPhone Provider
Type
Rating
Consumer Cellular
Traditional
89
Ting
Traditional
88
Grat Cell/Jitterbug
Traditional
79
Credo Mobile
Traditional
78
Virgin Mobile
Traditional...
Is there a difference in the variance of the satisfaction rating of traditional cellphone provider who...
Is there a difference in the variance of the satisfaction rating
of traditional cellphone provider who bill for service at the end
of a month (often under a contract) and prepaid cellphone service
providers who bill in advance without a contract? The following
table contains the satisfaction rating for 10 traditional cellphone
providers and 13 prepaid cellphone service. A.At the 0.05 level of
significance, is there evidence of a difference in the variability
of the satisfaction rating between the types...
Is there a difference in the variance of the satisfaction rating of traditional cellphone provider who...
Is there a difference in the variance of the satisfaction rating
of traditional cellphone provider who bill for service at the end
of a month (often under a contract) and prepaid cellphone service
providers who bill in advance without a contract? The table below
contains the satisfaction rating for 10 traditional cellphone
providers and 13 prepaid cellphone service.
CellPhone Provider
Type
Rating
Consumer Cellular
Traditional
89
Ting
Traditional
88
Grat Cell/Jitterbug
Traditional
79
Credo Mobile
Traditional
78
Virgin Mobile
Traditional...
Is there a difference in the variance of the satisfaction rating of traditional cellphone provider who...
Is there a difference in the variance of the satisfaction rating
of traditional cellphone provider who bill for service at the end
of a month (often under a contract) and prepaid cellphone service
providers who bill in advance without a contract? The file
CellphoneProviders (see folder) contains the satisfaction rating
for 10 traditional cellphone providers and 13 prepaid cellphone
service. A. At the 0.05 level of significance, is there evidence of
a difference in the variability of the satisfaction rating...
A town council wants to estimate the proportion of residents who are in favor of a...
A town council wants to estimate the proportion of residents who
are in favor of a proposal to upgrade the computers in the town
library. A random sample of 100 residents was selected, and 97 of
those selected indicated that they were in favor of the proposal.
Is it appropriate to assume that the sampling distribution of the
sample proportion is approximately normal?
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