7.STATISTICAL INFERENCEQuestion 3 c i) c)Suppose that the results of carrying out the hypothesis test lead to non-rejection of the nullhypothesis. Classify that conclusion by error type or as a correct decision if in fact the meanage at diagnosis of all people with early-onset dementia is less than 55 years old. Supposethat the manufacturer of a new COVID-19 vaccine in South Africa wants to test the nullhypothesis Ho: 8 = 0.90 against the alternative hypothesis H₂:0 = 0.60. She defined her teststatistic Y as a number of patients recovered from COVID-19 after an observed twenty trials.If she decided to accept H, and assume y > 14,i) What will be her Type I error and the power of the test.

Given information: H0:θ=0.90H1:θ=0.60 Let Y be the number of patients recovered from COVID-19 after…

Answered: c) Suppose that the results of carrying…

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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I need help in this question 1)A company claims that its new viral vaccine is 90% effective in preventing a contagious viraldisease. Suppose that in a clinical trial with 3000 respondents, 2640 did not get infected by thisdisease. Which is an appropiate test?a)No answer text provided.b)left-tailed z-testc)two-tailed z-testd) right-tailed z-test
24 - Which of the following statements is true regarding nonparametric tests? a) The variable is not suitable for any distribution O B) All O NS) Must be variable classification or ordinal scale O D) Variable parameters u are unknown O TO) The number of sample units (n) must be less than 30
Show supporting work for each section identify the null hypothesis & alternative hypothesis identify the critical value(s) identify the rejection region identify the standardized test statistic z=decide whether to reject or fail to reject the null hypothesis
26.. a-true b-false
Consider the summary of a survey conducted by a marketing firm regarding environmental protection policies among residents of two regions of the country. Policy Good for Business Find the p-value for testing the & | hypothesis that for Region1, “Good for Business & Jobs" is the dominant Policy Threat & | for Business Jobs Jobs Region Region1 Region2 opinion on environmental protection policies by taking more than half of the support of responders of the survey. 190 125 158 140 Type your numerical an
20-The trucks used by a logistics company for shipment use 3 different ways. The arrival times of the trucks are given below. Find the critical table value required to test whether there is a difference between the arrival times of these routes at the 0.05 significance level. a) 7.73 B) 5.67 NS) 9.34 D) 5.99 TO) 11.3
The following table represents the marks obtained by a batch of 10 students in certain class tests in statistics and accountancy. 1 2 3| 4 5 6 | 7 | 8 Serial No. 10 Marks 53 55 52 32 30 60 47 46 35 28 (Statistics) Marks 57 45 24 31 25 84 43 80 32 72 (Ассоuntancy) Indicate in which subject is the level of knowledge higher?
5. Say P (AIB) = 0.65, P (A) = 0.2 and P(B) = 0.3, find P(A or B).
1. Which of these two questions is unbiased and why? How is the other biased and why? i) Cotton farming is harmful to the environment. Should the government fund research into alternative fibre sources, such as hemp? — Yes — No ii) Alternatives to cotton for clothing fibre sources, such as hemp, exist. Should the government fund research into alternative fibre sources, such as hemp? — Yes _ No
1
Select the correct choice Part a: The destination (city, country) of a holiday trip is an example of1)qualitative 2)discrete quantitative 3)continuous quantitative 4)random variable. Part B: The exact distance (exact = without rounding to the nearest km) between the departure point and the arrival point is an example of1)qualitative 2)discrete quantitative 3)continuous quantitative 4)random variable. Part c) The difference between the number of passengers on a plane from destination A to destination B on a given day and the number of passengers on the same plane the next day from destination B to destination A is an example of1) qualitative 2)discrete quantitative 3)continuous quantitative 4)random variable. Part d) The random variable in part c is observed at the1)ratio scale 2)interval scale 3)ordinal scale4)nominal scale 5)traveling scale
3.) In a particular epidemic disease, 400 individuals were surveyed by a well-established pharmaceutical company to determine if the company’s new vaccine was effective after 4 months. Among the 120 individuals who had that disease and were given the shot, 29 were cured and achieved immunity after 4 months. Among 280 individuals who had the disease but were not given the shot, 56 were cured and achieved immunity after 4 months. Is there enough statistical evidence to support the company’s claim of the effectiveness of the vaccine?

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