1.) Health insurers are beginning to offer telemedicine services online that replace the common office visit. A company
Posted: Tue Apr 26, 2022 5:54 pm
1.)
Health insurers are beginning to offer telemedicine services
online that replace the common office visit. A company provides a
video service that allows subscribers to connect with a physician
online and receive prescribed treatments. The company claims that
users of its online service saved a significant amount of money on
a typical visit. The data shown below ($), for a sample of 20
online doctor visits, are consistent with the savings per
visit reported by the company.
Assuming the population is roughly symmetric, construct a 95%
confidence interval for the mean savings in dollars for a televisit
to the doctor as opposed to an office visit. (Round your answers to
the nearest cent.)
2.)
An air transport association surveys business travelers to
develop quality ratings for transatlantic gateway airports. The
maximum possible rating is 10. Suppose a simple random sample
of 50 business travelers is selected and each traveler is
asked to provide a rating for a certain airport. The ratings
obtained from the sample of 50 business travelers
follow.
Develop a 95% confidence interval estimate of the population
mean rating for this airport. (Round your answers to two decimal
places.)
3.)
A 95% confidence interval for a population mean was reported to
be 149.29 to 158.71. If
𝜎 = 15,
what sample size was used in this study? (Round your
answer to the nearest integer.)
Health insurers are beginning to offer telemedicine services
online that replace the common office visit. A company provides a
video service that allows subscribers to connect with a physician
online and receive prescribed treatments. The company claims that
users of its online service saved a significant amount of money on
a typical visit. The data shown below ($), for a sample of 20
online doctor visits, are consistent with the savings per
visit reported by the company.
Assuming the population is roughly symmetric, construct a 95%
confidence interval for the mean savings in dollars for a televisit
to the doctor as opposed to an office visit. (Round your answers to
the nearest cent.)
2.)
An air transport association surveys business travelers to
develop quality ratings for transatlantic gateway airports. The
maximum possible rating is 10. Suppose a simple random sample
of 50 business travelers is selected and each traveler is
asked to provide a rating for a certain airport. The ratings
obtained from the sample of 50 business travelers
follow.
Develop a 95% confidence interval estimate of the population
mean rating for this airport. (Round your answers to two decimal
places.)
3.)
A 95% confidence interval for a population mean was reported to
be 149.29 to 158.71. If
𝜎 = 15,
what sample size was used in this study? (Round your
answer to the nearest integer.)