Mathematics, 11.02.2021 21:00, kyusra2008
A.
Suppose a hospital would like to estimate the proportion of patients who feel that physicians who care for them always communicated effectively when discussing their medical care. A pilot sample of 40 patients found that 24 reported that their physician communicated effectively. Determine the additional number of patients that need to be sampled to construct a 90% confidence interval with a margin of error equal to 8% to estimate this proportion. The additional number of patients that need to be sampled is __? (Round up to the nearest integer.)
B.
A tire manufacturer would like to estimate the average tire life of its new all-season light truck tire in terms of how many miles it lasts. Determine the sample size needed to construct a 98% confidence interval with a margin of error equal to 2,700 miles. Assume the standard deviation for the tire life of this particular brand is 7,000 miles. The sample size needed is _? (Round up to the nearest integer.)
C.
A certain region would like to estimate the proportion of voters who intend to participate in upcoming elections. A pilot sample of 50 voters found that 28 of them intended to vote in the election. Determine the additional number of voters that need to be sampled to construct a 92% interval with a margin of error equal to 0.06 to estimate the proportion. The region should sample __? additional voters. (Round up to the nearest integer.)
D.
Determine the sample size n needed to construct a 95% confidence interval to estimate the population proportion for the following sample proportions when the margin of error equals 5%.
I. p=0.20
II. p=0.30
III. p=0.40
Answers: 1
Mathematics, 21.06.2019 19:30, Flaka2809
Asurvey of 45 teens found that they spent an average of 25.6 hours per week in front of a screen (television, computer, tablet, phone, based on the survey’s sample mean, which value could be the population mean? 2.3 hours 27.4 hours 75.3 hours 41.5 hours
Answers: 1
Mathematics, 21.06.2019 21:40, Blakemiller2020
Which of the following best describes the graph below? + + 2 + 3 + 4 1 o a. it is not a function. o b. it is a one-to-one function. o c. it is a many-to-one function. o d. it is a function, but it is not one-to-one.
Answers: 3
A.
Suppose a hospital would like to estimate the proportion of patients who feel that physicians wh...
History, 21.04.2020 20:39
History, 21.04.2020 20:39
History, 21.04.2020 20:39