A research group claims that 20% of patients with dementia never develop full Alzheimer's. In a simple random sample of 1,000 patients with dementia, 150 report that they never develop full Alzheimer's. Test the claim of the research group using a 5% significance level.

Question

A research group claims that 20% of patients with dementia never develop full Alzheimer's. In a simple random sample of 1,000 patients with dementia, 150 report that they never develop full Alzheimer's. Test the claim of the research group using a 5% significance level.

Expert Answer

Want to see the step-by-step answer?

Check out a sample Q&A here.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

*Response times may vary by subject and question complexity. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers.
Tagged in
Math
Statistics

Hypothesis Testing

Related Statistics Q&A

Find answers to questions asked by students like you.

Q: A researcher wants to investigate whether mindfulness training improves ability for employees to not...

A: In an experiment the factor is an explanatory varible which is manipulated by the experimenter. It i...

Q: Total plasma volume is important in determining the required plasma component in blood replacement t...

A: Note:Hi! Thank you for posting the question. Since your question has more than 3 parts, we have solv...

Q: Let x be per capita income in thousands of dollars. Let y be the number of medical doctors per 10,00...

A: Hi, since the problem posted by you contains multiple sub-parts, we are answering the first three su...

Q: Exam grades: scores on a statistics final in a large class were normally distributed with a mean of ...

A: Let X be the scores on statistics final, which is normally distributed with mean = 75 and standard d...

Q: Which is not one of the major assumptions typically associated with parametric tests of significance...

A: Introduction:Some of the major requirements (though not the only requirements and may vary from one ...

Q: A real estate agent believes that the value of houses in the neighborhood she works in has increased...

A: It is given that the alterative hypothesis is as follows: Ha : µd > 0, the t test statistic is 7....

Q: (a) In the random number table, assign the digits 0 through 8 to the event "successful surgery" and ...

A: Total number of digits assigned to event "successful surgery" (0-8) = 9Total number of digits assign...

Q: Find the critical value and rejection region for the type of​ t-test with level of significance α an...

A: Note:Hey! Thank you for posting the question. Since you have not mentioned the purpose for which the...

Q: The CEO of a cable company claims that the population mean wait time for callers at a company's cust...

A: The aim is to find the accurate statement from the following options to evaluate the population mean...

Q: A recent poll by the American Automobile Club found that 74.5% of those surveyed are worried about a...

A: Hey there! Thank you for posting the question. As your question has more than 3 parts, we have solve...

Q: In a recent survey it was stated that Americans watch television on average four hours per day. Assu...

A: Hey, since there are multiple subparts posted, we will answer first three subparts. If you want any ...

Q: Suppose x has a normal distribution with mean μ = 28 and standard deviation σ = 7.Describe the distr...

A: Note:Hi there! Thank you for posting the question. Your question asks about the “distribution of x v...

Q: Given a standardized normal distrubtion (with a mean of 0 and a standard deviation of 1, as in Table...

A: Standard normal distribution:The standard normal distribution is a special case of normal distributi...

Q: How do I solve this question with this table? obtain this sample using the portion of the random num...

A: By using random number table we can determine the random sampling with equal chance of occurrences o...

Q: Doctor Frederick believes the population mean weight of adult male patients in his practice is exact...

A: The aim is to find the accurate statement from the following options to evaluate the claim that the ...

Q: In a normal distribution with mean 3 and variance 49, what are the upper and lower limit scores for ...

A: The given information is that the scores distributed normally with mean 3 and variance is 49. The st...

Q: 15.) The age in years of 11 children and the number of words in their vocabulary is given below:    ...

A: The equation of the regression line is:

Q: Jane has stored three albums on her iPod. The first album consists of 11 songs by Frank Sinatra, the...

A: According to the given question, Jane has stored three albums on her iPod.The first album consists o...

Q: According to a random sample taken at 12 A.M., body temperatures of healthy adults have a bell-shape...

A: Chebyshev’s inequality:Chebyshev’s rule is appropriate for any distribution. That is, Chebyshev’s in...

Q: See attachment for question.

A: Given information:Here, it is given that Xi is a random variable.The probabilities of a random varia...

Q: How much money do winners go home with from the television quiz show Jeopardy? To determine an answe...

A: Solution:Confidence interval formula:Confidence interval = sample statistic ± margin of errorWhere, ...

Q: Age 18-23 24-29 30-35 36-41 42-47 48-53   Male 2 2 3 1 2 1 11 Female 5 3 4 3 1 3 19   7 5 7 4 ...

A: Given data of male and female people with in the mentioned age groups as shown below.The total numbe...

Q: Total plasma volume is important in determining the required plasma component in blood replacement t...

A: Hello there! there are more than 3  sub parts in question. It is against our policies to solve more ...

Q: I want you to come up with one study idea that would use a one sample chi square and one study that ...

A: The one sample Chi-square test is also called as Chi-square goodness of fit, which is used to decide...

Q: The president of Doerman Distributors, Inc., believes that 27% of the firm's orders come from first-...

A: In this question, it has been given that president of Doerman distributors believes 27% of the its f...

Q: Find the standard deviation for the group of data items. 5,5,5,5,7,9 ​(Simplify your answer. Rou...

A: Solution:Computation of standard deviation:Standard deviation for the group of data items is calcula...

Q: I asked this question before, and got an answer, but I have a question about the response that was g...

A: The formula that you shared from the text book is used for time-value-of-money calculations. Such a ...

Q: Zar (1999) describes an experiment in which 13 people with hemophilia were random oTeceve drug B and...

A: NOTE:Hi, the posted question is based on the data of haemophilia, but in part (a) it is asked to fin...

Q: About 42.3% of Californians and 19.6% of all Americans over age five speak a language other than Eng...

A: Solution:Let us consider that your class has 30 students.Null and alternative hypotheses:Here, to ch...

Q: Select the statistic test that best fits each description. Number of heart attacks per blood type (a...

A: Introduction:A brief introduction to the various tests suggested here is given below:T-test independ...

Q: A librarian would like to determine whether a new book appeals more to adults or to children. The li...

A: Independent samples:Two samples are independent if the sample values selected from one population ar...

Q: How much do wild mountain lions weigh? Adult wild mountain lions (18 months or older) captured and r...

A: In this question, we have the weighs of adult wild mountain lions, which is681071251276064 Using tha...

Q: An advertising executive wants to determine if a new billboard placed in a city caused sales of thei...

A: Given that we need to test to determine if a new billboard played in a city caused sales of their pr...

Q: Hi. How do you arrive at an answer using the TI-83? Thanks.

A: Solution:99% confidence interval for the slope of the regression line is calculated using EXCEL.The ...

Q: please answer the whole question  (3) Let x be per capita income in thousands of dollars. Let y be t...

A: Hi, since the problem posted by you contains multiple sub-parts, we are answering the first three su...

Q: Consider the probability distributions you have studied so far. Which of the following distributions...

A: Discrete distribution:If the probability of outcome of a statistical distribution is finite, then it...

Q: Is the magnitude of an earthquake related to the depth below the surface at which the quake occurs? ...

A: (a) Scatter diagram of the data:The line that best fits the data is least-squares regression line.Th...

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you bel...

A: According to previous evidence, the population proportion (p) is 36%, that is, 0.36.Here, the margin...

Q: The Congressional Budget Office reports that 36% of federal civilian employees have a bachelor's deg...

A: Note:Thank you for posting the question! Since your question has more than 3 parts, we have solved t...

Q: Hi. I need help with part (d) and (e) The bond behavior of reinforcing bars is an important determin...

A: (d) The error standard deviation:The formula to estimate the standard deviation (σ) of the error (ε)...

Q: What degrees of freedom would younormally expect a t test to have when N1 = 40 and N2 = 55?

A: It is provided that there are two samples of size n1=40 and n2=55.So, this is an example of 'two sam...

Q: Directions: Draw the normal curve and shade the specific region show formulas     A random same of 2...

A: Confidence interval:The (1-α) % confidence interval for proportion p is given by,

Q: 3. In a survey of 209 Montana residents, 61 reported their financial status was worse than a year ag...

A: (a) Computing the point estimate of population proportion:The point estimate of population proportio...

Q: What happens to the variance when outliers are eliminated replaced by values closer to the mean

A: Introduction:Mean:Mean is an important measure of center when the data is quantitative. Mean of a da...

Q: Listed below are paired data consisting of amounts spent on advertising (in millions of dollars) and...

A: Let r denote the linear correlation between advertising cost (x) and profit (y). The hypotheses are ...

Q: A random sample of 30 binomial trials resulted in 12 success. Test the claim that the population por...

A: Hey, since there is multiple subpart questions posted, we will answer first three subparts. If you w...

Q: A raffle is being held to benefit the local animal shelter. They sell 832 tickets that do not win an...

A: Total number of tickets sold = 832+9+1 = 842Price of each ticket = $5Total income from 842 tickets =...

Q: A computer system uses passwords that contain exactly 6 characters, and each character is 1 of the 2...

A:  We have to make a password of 6 digits whose digits can be 26 lowercase alphabets, 26 uppercase alp...

Q: Assume that a populatio of thousands of people whose responses were used to develop the anxiety test...

A: Hey, since there multiple subparts posted, we will answer first three subparts. If you want any spec...

Q: See attachment.

A: Given X(n,p) is a binomial random variable with parameters n,p.n is total number of trailsp is proba...