2. The Chinese Mini-Mental Status Test (CMMS) consists of 114 items intended to identify people withAlzheimer's disease and senile dementia among people in China. An extensive clinical evaluation of thisinstrument was performed, whereby participants were interviewed by psychiatrists and nurses and adefinitive diagnosis of d+nentia was made. The table below shows the results of the study.CMMS scoreNo DementiaDementia0-56-1011-1516-2021-2526-30Total003916184621453116Suppose a cutoff value of ≤ 20 on the test is used to identify people with dementia. Further assume therate of dementia in the population of interest is approximately 10%.a. What is the sensitivity of this test?b.What is the specificity of this test?c. Suppose your grandmother receives a negative test result. What are the chances that sheactually has dementia?

Answered: a. What is the sensitivity of this…

a. What is the sensitivity of this test? b. What is the specificity of this test? c. Suppose your grandmother receives a negative test result. What are the chances that she actually has dementia?

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

See similar textbooks

Related questions

Q: What is the level of significance? State the null and alternate hypotheses. The level of…

A: Given: alpha = 0.05

Q: What does it mean when a researcher reports that the probability for a statistic was p = 0.089? a.…

A: Definition: Alpha level of significance is the probability of making type I error.

Q: college students average about 7 hours of sleep per night. You believe this number is incorrect and…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: Researchers collected data on the numbers of hospital admissions resulting from motor vehicle…

A: Disclaimer: Since you have posted a question with multiple sub-parts, we will solve the first three…

Q: You would first reject the same test statistic x at a higher significance level if the degrees of…

A: given data we have to find the statement is true or false. we would first reject the same test…

Q: If for a Two-Way ANOVA, the number of treatments is 16, what is the corresponding degrees of…

A: If for a Two-Way ANOVA, the number of treatments is 16, what is the corresponding degrees of…

Q: Prostate Cancer Screening. According to a 2018 article in Esquire magazine, approximately 70% of…

A: Since you have posted a question with multiple subparts, we will solve first three subparts for you.…

Q: James is a school psychologist who wants to implement stress coping skills to help his students. His…

A: Here the direction of the test is to the left.

Q: National Gambling Impact Study Commission randomly selected 2469 adults and found that 60 were…

A: The question is about hypo. testing Given : Randomly selected no. of adults ( n ) = 2469 No. of…

Q: What type of question is this-estimation or hypothesis? What type of study is this sample data or…

A: Here, we are going to test the hypothesis and to know data types.

Q: Do sports drinks help prevent cramps in endurance sports? At the end of a marathon, officials will…

A: Observational study: In observational study, the individuals of the study are observed by the…

Q: SCENARIO 5 A teacher is explaining to her class the concepts of genetics regarding eye color. She…

A: Note: If the post contains multiple subparts of same question, only allow to first 3 subparts as…

Q: A credit score is used by credit agencies (such as mortgage companies and banks) to assess the…

Q: uppose a random sample of 100 cards has 50 rookies, 45 veterans, and 5 All-Stars. Is this consistent…

A: Given Aplha = 0.05 Df=N-1 =3-1=2

Q: Consider a researcher who is exploring new potential treatments for specific forms of cancer. This…

A: Significance level: In hypothesis testing the Type I error is said to be committed when true null…

Q: In one study of smokers who tried to quit smoking with nicotine patch therapy, 38 were smoking one…

A: given data, 38- smoking 30-not smoking 68-total calim:majority are smoking one year after treatement…

Q: Problem: If you are running a 2-sided test with a significance level 5% and the test statistic is…

Q: Which of the following is the name for the statistical hypothesis that describes an outcome of some…

A: The question is asking for the term that describes a statistical hypothesis that represents a change…

Q: What are we testing in this problem? O single mean O single proportion (a) What is the level of…

A: In this scenario, It is appropriate to use one proportion Z test. The correct answer is “Single…

Q: An article reports that blue eyed people earn less than brown eyed people, with these numbers:…

A: P-value is much greater than 0.05 level of significance.

Q: a. What is hypothesis testing in statistics? Discuss b. Does Type I error being considered more…

A: We have some basic questions regarding hypothesis testing and we have to answer them.

Q: If a male receives a positive pregnancy test, is this type I or type II error?

A: We know that; Type-I Error is rejection of the null hypothesis when it is really true. Type-II Error…

Q: What is a relevant to hypothesis testing in your daily life? This could be school life, personal…

A: Hypothesis:Hypothesis is an assumption about the parameter of the population which will be made on…

Q: An article published in the “American Journal of Public Health” describes the results of a health…

A: No. of years of age or older male convicts in the administered health survey, The sample proportion…

Q: People should be allowed to burn or deface the American flag as a…

A: Here, we are going to know about the hypothesis and

Q: 19% of deaths among male adults can be attributed to heart diseases. Is this percentage different…

A: Solution: It is given that 19% of deaths among male students can be attributed to heart diseases.

Q: Suppose you want to test the claim that a population mean equals 38. State the null hypothesis.

A: Given that, Claim: population mean equals 38.

Q: What are some factors to consider in "setting" an alpha level for a statistical test?

A: Introduction: It is required to identify some factors to consider while determining the alpha level,…

Q: URGENT PLEASE ANSWER ASAP A researcher tested 300 independent null hypotheses using a significance…

A: The given data is as follows:Total number of tests, Significance level for each test,

Q: In a One-Sample Chi-Square Test (Goodness of Fit Test) you have both an independent and a dependent…

A: Given problem Given that In a One-Sample Chi-Square Test ( Goodness of Fit Test ) you have both…

Q: A marketing agency wanted to determine if a new commercial changed people's opinion about a company.…

A: Statistical hypothesis means the decision about a population parameter. Here we look at the data we…

Question

2. The Chinese Mini-Mental Status Test (CMMS) consists of 114 items intended to identify people with
Alzheimer's disease and senile dementia among people in China. An extensive clinical evaluation of this
instrument was performed, whereby participants were interviewed by psychiatrists and nurses and a
definitive diagnosis of d+nentia was made. The table below shows the results of the study.
CMMS score
No Dementia
Dementia
0-5
6-10
11-15
16-20
21-25
26-30
Total
0
0
3
9
16
18
46
2
1
4
5
3
1
16
Suppose a cutoff value of ≤ 20 on the test is used to identify people with dementia. Further assume the
rate of dementia in the population of interest is approximately 10%.
a. What is the sensitivity of this test?
b.
What is the specificity of this test?
c. Suppose your grandmother receives a negative test result. What are the chances that she
actually has dementia?

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps with 3 images

SEE SOLUTION Check out a sample Q&A here

Follow-up Questions

Read through expert solutions to related follow-up questions below.

Follow-up Question

Hi, I don't think you answered part c at all. Wouldn't you have to calculate the NPV? The ngeative predictive value?

Solution

by Bartleby Expert

SEE SOLUTION

Similar questions

Which of the following is the name for the statistical hypothesis that describes no change, or nothing expected? Type I error Null hypothesis Type II error Alternative hypothesis
If an experimenter realizes that the consequences of a type one error are severe, then he will most likely set the significance level of the test at 5% or possibly higher if the consequences are particularly troublesome a. true b. false
If you use a 0.025 level of significance in a (two-tail) hypothesis test, what is your decision rule for rejecting a null hypothesis that the population mean is 600 if you use the Z test? Click here to view page 1 of the Normal table. LOADING... Click here to view page 2 of the Normal table. LOADING... Question content area bottom Part 1 Which of the following decision rules is correct? A. Reject H0 if ZSTAT<−2.24 or ZSTAT>+2.24. B. Reject H0 if −2.24<ZSTAT<+2.24. C. Reject H0 if −1.96<ZSTAT<+1.96. D. Reject H0 if ZSTAT<−1.96 or ZSTAT>+1.96.
A researcher believes that the method of instruction affects how well nursing students learn clinical skills. A total of N=20 nursing students are randomly assigned to learn clinical skills in one of four ways (texts, simulations, observations, or lectures), and their scores on a quiz on these clinical skills are assessed for each nursing student. The results are below. Use ?=.05 a. state the hypotheses (both in words and symbols) b. complete the ANOVA table above c. what should she conclude, use α = .05? (be sure to write the answer in APA format & Include F crit
Which of the following is the name for the statistical hypothesis that describes no change, or nothing expected? Type I error Null hypothesis Type II error Alternative hypothesis
Dr. Smith is examining the development of moral reasoning in children. Seven children (11-years old) are assessed three times over the year. The children are given moral reasoning scenarios. Higher scores indicate higher levels of moral reasoning. Time 1 Time 2 Time 3 5 6 10 4 7 9 8 8 9 7 9 7 6 5 10 3 5 7 2 2 4 Identify and calculate the appropriate test statistic.Make sure to report the degrees of freedom for the statistical test (if appropriate). State your conclusions (use a two-tailed test with a = .05 for all tests). Compute an effect size.
Which of the following is the name for the statistical hypothesis that describes no change, or nothing expected? Type I error Type II error Alternative hypothesis Null hypothesis
Can you please answer all of the questions in the picture please. Explain and show your work ON PICTURES PLEASE! IT'S EASY TO UNDERTAND.
a. If a null hypothesis is rejected with a significance level of 0.05, is it also rejected with a significance level of 0.01? Why or why not? Suppose the level of significance for carrying out the test is lowered from 5% to 1%. As a result, has the likelihood of rejecting the null hypothesis when it is true increased or decreased? Explain
Which of the following is the name for the statistical hypothesis that describes an outcome of some change? Null hypothesis Alternative hypothesis Type I error Type II error