In a large population, 3% have had a heart attack. Suppose a medical researcher randomly selects...

In a large population, 3% have had a heart attack. Suppose a medical researcher randomly selects two people. Let X represent the event the first person has had a heart attack. Let Y represent the event the second person has had a heart attack. Which of the following is true about the two events? X and Y are disjoint. X and Y are independent. None of the above are true. Both (A) and (B) are true. plese show expakin how and why and all steps how to check it

Solutions

Expert Solution

Answer:

Correct Answer: Option (B) X and Y are independent

Since First person heart attack is not affected by the second person heart attack and vice-versa, so the two events are independent

[OR]

Solution:

NOTE::I HOP THIS ANSWER IS HELPFUL TO YOU.....***PLEASE SUPPORT ME WITH YOUR

RATING.....GIVE ME LIKE ......THANK YOU

orchestra answered 1 year ago

Next > < Previous

Related Solutions

A researcher is interested in heart rates of university students. The researcher randomly selects 52 students...

A researcher is interested in heart rates of university students. The researcher randomly selects 52 students from a class they are teaching and measures the students’ heart rates. The data obtained is in the file “Heart Rates.csv”. 1. What is the target population? What is the study population? What is an individual? 2. Is this an observational study or an experiment? 3. The tools you have learned for doing statistical inference require that certain assumptions be met. Check whether these...

(Computational) Applied Statistics Problem 1: A noted medical researcher has suggested that a heart attack is...

(Computational) Applied Statistics Problem 1: A noted medical researcher has suggested that a heart attack is less likely to occur among adults who actively participate in athletics. A random sample of 300 adults is obtained. Of that total, 100 are found to be athletically active. Within this group, 10 suffered heart attacks; among the 200 athletically inactive adults, 26 had suffered heart attacks. a) Test the hypothesis that the proportion of adults who are active and sufferedheart attacks is different...

The probability that a patient with a heart attack dies of the attack is 4%. Suppose...

The probability that a patient with a heart attack dies of the attack is 4%. Suppose we have 4 patients who suffer a heart attack a) what is the probability that 2 will survive? b) what is the probability that all will die? c) what is the probability that less than 3 will survive? d) what is the probability that all will survive?

A researcher randomly selects 6 fathers who have adult sons and records the fathers' and sons'...

A researcher randomly selects 6 fathers who have adult sons and records the fathers' and sons' heights to obtain the data shown in the table below. Test the claim that sons are taller than their fathers at the alpha equals 0.10α=0.10 level of significance. The normal probability plot and boxplot indicate that the differences are approximately normally distributed with no outliers so the use of a paired t-test is reasonable 67.5 72.9 68.4 71.2 67.7 66.8 71.1 71.3 67.6 74.7...

A researcher randomly selects 6 fathers who have adult sons and records the fathers' and sons'...

A researcher randomly selects 6 fathers who have adult sons and records the fathers' and sons' heights to obtain the data shown in the table below. Test the claim that sons are taller than their fathers at the α=0.10 level of significance. The normal probability plot and boxplot indicate that the differences are approximately normally distributed with no outliers so the use of a paired t-test is reasonable. Observation 1 2 3 4 5 6 Height of father (in inches)...

A researcher interested in the working habits of students at RCC randomly selects 300 students and...

A researcher interested in the working habits of students at RCC randomly selects 300 students and finds that 23% have a full time job. (a) Did the study use population or sample data? Explain. (b) If sample data was used, what is the population it was drawn from? (c) Is the figure 23% a parameter or a statistic? Explain. (d) Is the variable qualitative or quantitative? Explain.

A researcher selects a sample of 100 participants from a population with a mean of 38...

A researcher selects a sample of 100 participants from a population with a mean of 38 and a standard deviation of 20. About 68% of the sample means in this sampling distribution should be between ______ and ______. Show your work

3) A medical researcher is interested in knowing what percentage of the U.S. population has a...

3) A medical researcher is interested in knowing what percentage of the U.S. population has a certain gene. The researcher collect a random sample of 529 people from across the country, and tests them for the gene. The gene was present in 57 of the 529 people tested. a) Find a 90% confidence interval for the true proportion of people in the U.S. with the gene. b) Provide the right endpoint of the interval as your answer. Round your answer...

A researcher wants to study the relationship between salary and gender. She randomly selects 384individuals and...

A researcher wants to study the relationship between salary and gender. She randomly selects 384individuals and determines their salary and gender. Can the researcher conclude that salary and gender are dependent? Income Male Female Total Below $25,000 31 84 115 $⁢25,000-$50,000 59 45 104 $⁢50,000-$75,000 30 20 50 Above $75,000 65 50 115 Total 185 199 384384 State the null and alternative hypothesis -Find the expected value for the number of men with an income below $25,000? Find the expected...

. A researcher selects a random sample of 10 persons from a population of truck drivers...

. A researcher selects a random sample of 10 persons from a population of truck drivers and gives them a driver’s aptitude test. Their scores are 22,3,14,8,11,5,18,13,12, and 12. (a) Find the estimated standard error of the mean. (b) Find the 95% confidence interval for the population mean.

Subjects