8. According to the CDC (2016), the average lifeexpectancy of someone with diabetes is u = 72%3Dyears, o = 14. Suppose that a sample of n = 64%3Dpeople diagnosed with diabetes who received ablood glucose monitoring implant had anaverage life expectancy of Mthe hypothesis that the glucose monitoring= 76 years. Testimplant changes life expectancy. Assume a two-tailed test, a = .05.

Answered: Image /qna-images/answer/70da39d8-08b1-41ad-ab98-2b67a2010b06.jpg

Answered: 8. According to the CDC (2016), the…

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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2. Consider a study where students are measured on whether they had an internship during their time at WKU (Y/N) and whether they had a job at graduation (Y/N). If we wanted to test whether having an internship was associated with having a job at graduation (i.e., internship holders were more likely to have jobs), why would the chi-square test be inappropriate for this hypothesis? How should we analyze our data?
A researcher is concerned that his new antihypertensive medication may be causing insomnia in some of his patients. Suppose he gathers an SRS of 65 patients treated with the study drug with a sample average of 6.6 hours of sleep and a σ=1.1. Assuming that insomnia can be quantified as an average of 4.5 hours of sleep, can we determine with 95% confidence that his drug avoids diagnosis of insomnia as a side-effect?
4.A new vitamin supplementation program is intended to decrease average resting heart rate inindividuals at risk for hypertension. Assume that a team of researchers are hopeful that restingheart rate in their population will get down to less than 68 bpm, in a population with a standarddeviation of 2 bpm. In order to test this goal reduction, the team gathers a SRS of 273participants in their program and calculates a sample average resting heart rate of 74 bpm.A) Carry out a one sample Z test to determine if the team can conclude that the supplementationprogram is successful in meeting their goal reduction in resting heart rate. Use an α=0.05.B) Construct a 95% Confidence interval about the sample mean, and interpret the result.
Suppose that you plot the residuals for your sample and get Figure 2. You should conclude that Select one: a. possibly homoskedastic and you would perform a correction for homoskedasticity. b. likely homoskedastic. c. possibly heteroskedastic and you would perform a formal test for heteroskedasticity. d. definitely heteroskedastic.
An alpha level of 0.05 means that 99% of the means are likely to reflect the null hypothesis. True False
Suppose annual demand for a product is normallydistributed, with a mean of 600 and a variance of 300.Suppose that the lead time for an order is always one month.Show (without using Equation (8)) that the lead time demandhas mean 50, variance 25, and standard deviation 5. Assumethat the demands during different one-month periods areindependent, identically distributed random variables.
If the null hypothesis Ho : mean = 17.0 is rejected at alpha = 0.01 when a mean of 21.0 is obtained from a random sample, ?
2. The strength of steel wire made by an existing process is normally distributed with a mean of 1550 and a standard deviation of 170. A batch of wire is made by a new process, and a random sample consisting of 25 measurements gives an average strength of 1316. Assume that the standard deviation does not change. Is there evidence at the 1% level of significance that the new process gives a larger mean strength than the old? To answer this question, the alternative hypothesis could be stated as A. µ = 1550 psi B. µ > 1550 psi C. µ ≠ 1550 psi D. µ < 1550 psi
A firm is studying the delivery times of two raw material suppliers. The firm is basically satisfied with supplierA and is prepared to stay with that supplier. However, if the firm finds that the mean delivery time of supplierB is less than that of supplier A, it will begin making raw material purchases from supplier B. Assume that 50independent samples from each supplier show the delivery time of supplier A to be 14 days with a standarddeviation of 3 days, while the delivery time of B is shown to be 12.5 days with a standard deviation of 2 days.Testing at a 0.05 level of significance, should the firm switch to supplier B or not? Compute for: null and alternative hypothesis in words level of significance and critical value/s and region (graph it please) compute the test statistic decision state the conclusion
The supervisor of a production line believes that the average time to assemble an electronic component is at least 19 minutes. Assume that assembly time is normally distributed with a standard deviation of 3.4 minutes. The supervisor times the assembly of 14 components and finds that the average time for completion is 11.6 minutes. What are the appropriate null and alternative hypotheses? H0 : μ ≥ 19 and H1: μ < 19 H0 : μ ≤ 19 and H1: μ > 19 H0 : μ = 19 and H1: μ ≠ 19 H0 : μ ≠ 19 and H1: μ = 19
Suppose that 80% of 3–4-year-old children and 70% of5–8-year-old children in a village are vaccinated with QIVvaccine. Also assume that children who are not vaccinatedhave twice the incidence of influenza as the control groupin Table 3.7.3.29 What % of 3–4-year-old children in the village will getinfluenza?3.30 What % of 5–8-year-old children in the village will getinfluenza?3.31 Suppose we identify a 5–8-year-old child with influenzain the village but are uncertain whether the childwas vaccinated. If we make the same assumptions as inProblems 3.29–3.30, then what is the probability that thechild was vaccinated? (Hint: Use Bayes’ rule here.)
According to a certain government agency for a large country, the proportion of fatal traffic accidents in the country in which the driver had a positive blood alcohol concentration (BAC) is 0.33.Suppose a random sample of 109 traffic fatalities in a certain region results in 47that involved a positive BAC. Does the sample evidence suggest that the region has a higher proportion of traffic fatalities involving a positive BAC than the country at the α=0.05 level of significance?

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