Before settling on a National Health Care plan, the senate committee wants to know theadditional cost that employers will have to pay. In order to compute this additional cost, thecommittee needs to estimate the proportion of the work force that currently does not havehealth insurance. This estimate should have an error no bigger than .02 and a confidencelevel of 95%. A previous similar survey resulted in 23% of the workforce being uninsured.What size sample should the senate committee take in order to meet their goals when theyestimate the current proportion of the work force that do not have health insurance?2.

Obtain the sample size of a preliminary estimate for p is 0.23 with the 95% confidence. The…

Answered: Before settling on a National Health…

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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A physical therapist wants to determine the difference in the proportion of men and women who participate in regular sustained physical activity. What sample size should be obtained if she wishes the estimate to be within five percentage points with 95% confidence, assuming that (a) she uses the estimates of 22.9% male and 19.5% female from a previous year? (b) she does not use any prior estimates?
The following contingency table records some information about a sample of visitors to Old Fort William over a long weekend in August. Local Other Canadian Non-Canadian Total Young Child 40 75 35 150 Teen 25 50 20 95 Young Adult Mid Aged Adult 140 85 125 200 465 100 195 380 Senior Adult 120 165 125 410 Total 410 685 405 1500 Given the above information and choosing a level of significance of a = 0.01; you should reject the null hypothesis that there is at least one difference in origins among age groups that is statistically significant. True False
Ms Best is a high school math teacher. Ms. Best has two sections of geometry. She teaches one section using a traditional approach. The second section Ms Best uses a tasked-based learning approach. The table below summarizes the descriptive statistics for the final exam. Ms Best concludes that the tasked-based learning approach students consistently scored higher than the traditional students. Is Ms Best conclusion correct? Why? Be very thorough in your response and use all the statistics reported and their interpretation to support your answer. Tasked-Based Traditional Learning Mean 73.1 Mean 83.5 Median 73.0 Median 82.0 Mode 73.0 Mode 83.0 Standard Standard 17.5 13.2 Deviation Deviation
Do you think that using a margin of error greater than 5 percent is acceptable when conducting a research study on the poor performance of students at a specific university? Give reasons for your answer and support it with evidence.
The planning director of Wellington, NZ, wants to determine whether the mean age of residents in his city is similar to 29.6 years (the national average age). A random sample of 80 residents is surveyed, with a desired confidence level of 99%. The Research Hypothess is: Mean Age (Wellington) Mean Age (National) Mean Age (Wellington)# Mean Age (National) Mean Age (Wellington)2 Mean Age (National)
Color blindness, or dyschromatopsia, is a form of genetic deficiency in color perception. The condition is much more prevalent among males than females, pointing to a genetic connection with the X chromosome. The frequency of dyschromatopsia in the Caucasian American male population is about 7%. However, it is thought that this proportion might be smaller among males of other ethnicities. We want to estimate the proportion of Asian American males who are color-blind. How large a sample size do we need in order to obtain a 95% confidence interval with a margin of error no greater than 5%, or 0.05? Use 0.5 for p̂.
In 2006, the average household debt service ratio for homeowners was 14.35. The household debt service ratio is the ratio of debt payments to disposable personal income. Debt payments consist of mortgage payments and payments on consumer debts. To determine whether this economic measure has increased a random sample of Americans was drawn. Can we infer from the data that the debt service ratio has increased since 2006? Use a 5% significance level. ONLY USE EXCEL AND PLEASE SHOW ALL STEPS AND EXCEL COMMANDS. Debt ratio 13.93 17.35 16.37 18.15 14.22 11.4 14.77 13.8 16.1 11.58 13 17.57 13.57 11.76 14.32 10.87 13.72 10.13 9.51 18.1 10.26 14.92 9.61 13.5 13.43 9.79 18.92 15.28 13.43 3.09 16.37 17.41 14.66 12.11 10.31 13.95 16.09 13.03 14.22 20.57 13.61 14.89 13.69 17.3 16.39 16.3 9.3 17.06 11.32 9.63 10.19 15.49 14.69 16.09 7.91 12.76 11.66 18.31 16.57 11.69 6.19…
A hospital administrator wants to estimate the proportion of patients whose hospital stay exceeds a week. How many patients should be sampled to estimate the proportion staying more than a week to within 4 percentage points with 90% confidence?
Explain the differences between independent samples and dependent samples as it applies to statistical testing of data.
The admisnistrators of Rowan university wants to know more about the knowledge of students regarding international events. They are concerned that their students are uninformed with regards to the news from other countries. When a standardized test is used to assess the knowledge of all students at al US universities about world events, it is reported that the national mean. A sample of 35 students from Rowan university are tested and the sample mean is 58 and the standard error is 3.2. The 99 percent confidence interval of population mean knowledge of the students at Rowan university has to be determined. 8. The variance of the national accounting examination score is 900. We want to estimate the sample mean score within 5 points of the population mean score with 99% confidence. The sample size of examinees that will be surveyed to meet these conditions is?

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