Researchers selected a simple random sample of 4048 medical records of adults diagnosed with gum disease. In all, 2226 werecurrent smokers, 891 were former smokers, and 931 never smoked regularly. Their research question is:Do these data indicate that gum disease is equally likely regardless of smoking status?What is the P-value for testing this null hypothesis of an equal representation of current, former, and never smokers amongadults diagnosed with gum disease?less than 0.05 but greater than 0.01greater than 0.10less than 0.01less than 0.10 but greater than 0.05

Correct option is 3rd Less than 0.01

Answered: ese data indicate that gum disease is…

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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Stephen has developed a diagnostic tool that predict the probability of having the eye disease. He tested the device in 60 patients and got the following results: Diagnosed with eye disease Diagnosed without eye disease With eye disease 13 16 Without eye disease 17 14 What is the sensitivity of Stefáns tool? 1. 0.43 2. 0.47 3. 0.45 4. 0.41
Alzheimer’s disease increases in frequency with an increase in age and is responsible for deficits in memory, thinking, judgement and reasoning. Reports show that 10% of Americans over the age of 65 have Alzheimer’s disease. A researcher believes that this proportion is increasing over time and conducts a c hypothesis test. Out of the 100 Americans over the age of 65 in her sample, 15 of them have the disease. Is this enough evidence to show the researcher’s claim is true? Test at 0.05 alpha level.
What is the appropriate conclusion for this test? (Do not reject OR reject) H₀ and conclude that there (is or is not) sufficient evidence that mice with an average life span of 32 months will live to be (less or greater) than 42 months old when 40% of the calories in their diet are replaced by vitamins and protein.
According to a study, brain weights of men in country A are normally distributed with mean 1.39kg and standard deviation 0.15kg. Apply the empirical rule to complete each sentence. Complete parts (a) through (d). a. Complete the sentence "Approximately 68% of the men have brain weights between _____ kg and _____ kg." Approximately 68% of the men have brain weights between kg and kg.(Type integers or decimals. Do not round) b. Complete the sentence "Approximately 95% of the men have brain weights between _____ kg and _____ kg." Approximately 95% of the men have brain weights between kg and kg.(Type integers or decimals. Do not round)
The z-statistic for a one-sided test is z=2.29 this test is A) not statistically significant at either a=0.05 or a=0.01 B) statistically significant at a= 0.05 but not at a=0.01 C) statistically significant at both a=0.05 and a=0.01
A survey was undertaken to compare the educational background of several different generation. One generation of interest was the Millennials (those born after 1980). A sample of 650 Millennials was taken, and each was asked to report the highest level of completed education. It was found that 214 of those surveyed had completed a Bachelor's degree or higher. With 98% confidence, we estimate between ______% and _______% of all Millennials have completed a Bachelor's degree or higher. (After converting to percentages, round the limits of your interval to two decimal places.) A sample of 682 Gen Xers (those born between 1965 & 1980) was taken and they were asked the same question. Of this sample, 169 individuals had completed a Bachelor's degree or highter. With 98% confidence, we estimate between ______% and ______% of all Gen Xers have completed a Bachelor's degree or highter. (After converting to percentages, round the limits of your interval to two decimal places.)
The standard deviation of a discrete random variableo is the positive square root of its: O a. median. O b. mean. O c. variance. O d. mode. NE DUS PAGE
6
Instructor-created question E Question Help Course Note Packet Chapter 9 Page 8 and 10 How do professionals stay on top of their careers? Of 1,000 surveyed members of a business networking website, 580 reported that they engaged in professional networking within the last month. At the 0.01 level of significance, is there evidence that the proportion of all site members who engaged in professional networking within the last month is different from 55%? State the null and alternative hypotheses. Hn На Calculate the test statistic. ZSTAT =O (Type an integer or a decimal. Round to two decimal places as needed.) What is the p-value? The p-value is (Type an integer or a decimal. Round to three decimal places as needed.) State the conclusion of the test. V the null hypothesis. There is V evidence conclude that the proportion of all site members who engaged in professional networking within the last month is different from 55%.
11
A left-tailed z-test found a test statistic of z = -1.99. At a 5% level of significance, what would the correct decision be? Question 20 options: Do not reject H0 Do not reject H1 Accept H0 Reject H1 Reject H0
15

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