The high temperatures (in degrees Fahrenheit) of a random sample of 7 small townsare:96.699.198.898.797.298.497.7Assume high temperatures are normally distributed. Based on this data, find the 98%confidence interval of the mean high temperature of towns. Enter your answer as anopen-interval (i.e., parentheses) accurate to two decimal places (because the sampledata are reported accurate to one decimal place).98% C.I. =Answer should be obtained without any preliminary rounding. However, the criticalvalue may be rounded to 3 decimal places.

The random sample of high temperatures in 7 towns is provided as follows:The sample size is .The…

Answered: The high temperatures (in degrees…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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In a survey of 500 potential jurors, one study found that 350 were regular watchers of at least one crime-scene forensics television series. (a) Assuming that it is reasonable to regard this sample of 500 potential jurors as representative of potential jurors in the United States, use the given information to construct a 95% confidence interval for the true proportion of potential jurors who regularly watch at least one crime-scene investigation series. (Give the answer to three decimal places.)( , )
On the Navajo Reservation, a random sample of 222 permanent dwellings in the Fort Defiance region showed that 56 were traditional Navajo hogans. In the Indian Wells region, a random sample of 141 permanent dwellings showed that 17 were traditional hogans. Let p1 be the population proportion of all traditional hogans in the Fort Defiance region, and let p2 be the population proportion of all traditional hogans in the Indian Wells region. Find a 90% confidence interval for p1 − p2. (Round your answer to three decimal places.) lower limit upper limit
From a random sample of 185 children from school G, 108 indicated they wanted to study science in college. From a different random sample of 165 children from school H, 92 indicated they wanted to study science in college. Assuming all conditions for inference are met, which of the following is closest to the standard error for a confidence interval for the difference in population proportions between the two schools of children who want to study science in college?
A sociologist is interested in surveying workers in computer-related jobs to estimate the proportion of such workers who have changed jobs within the past year. a) In the absence of preliminary data, how large a sample must be taken to ensure that a 95% confidence interval will specify the proportion to within ±0.05? b) In a sample of 100 workers, 20 of them had changed jobs within the past year. Find a 95% confidence interval for the proportion of workers who have changed jobs within the past year. c) Based on the data in part (b), estimate the sample size needed so that the 95% confidence interval will specify the proportion to within ±0.05.
On the Navajo Reservation, a random sample of 214 permanent dwellings in the Fort Defiance region showed that 58 were traditional Navajo hogans. In the Indian Wells region, a random sample of 151 permanent dwellings showed that 19 were traditional hogans. Let p1 be the population proportion of all traditional hogans in the Fort Defiance region, and let p2 be the population proportion of all traditional hogans in the Indian Wells region. (a) Find a 90% confidence interval for p1 – p2. (Use 3 decimal places.) lower limit upper limit
The germination periods, in days, for grass seed are normally distributed with a population standard deviation of 7 days and an unknown population mean. If a random sample of 17 types of grass seed is taken and results in a sample mean of 37 days, find the error bound (EBM) of the confidence interval with a 98% confidence level. z0.10 z0.05 z0.025 z0.01 z0.005 1.282 1.645 1.960 2.326 2.576
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On the Navajo Reservation, a random sample of 210 permanent dwellings in the Fort Defiance region showed that 63 were traditional Navajo hogans. In the Indian Wells region, a random sample of 152 permanent dwellings showed that 22 were traditional hogans. Let p1 be the population proportion of all traditional hogans in the Fort Defiance region, and let p2 be the population proportion of all traditional hogans in the Indian Wells region. (a) Find a 99% confidence interval for p1 – p2. (Round your answers to three decimal places.) lower limit upper limit (b) Examine the confidence interval and comment on its meaning. Does it include numbers that are all positive? all negative? mixed? What if it is hypothesized that Navajo who follow the traditional culture of their people tend to occupy hogans? Comment on the confidence interval for p1 – p2 in this context. Because the interval contains only positive numbers, we can say that there is a higher proportion of hogans in the Fort…
In a simple random sample of 300 college students, 35.0 percent stated that they intended to pursue an advanced degree. [Show Work] A. How many of the 300 college students sampled intend to pursue an advanced degree? B. To the 95 percent confidence level, find the confidence interval estimate, (to nearest tenth of a percent) of ALL college students who intend to pursue an advanced degree, Can we safely assume that less than 40.0% of all college students intend to pursue an advanced degree? C. If we wanted to reduce the margin of error to 4.0 percent, how big would our sample SIZE have to be (again, to the 95 percent confidence level)?

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