An investigator conducts a study to investigate whether there is a difference in mean PEF in children with chronic bronchitis as compared to those without. There are 25 children without bronchitis in the sample, and they have a mean PEF of 319 with a standard deviation of 74. Construct a two-sided 95% confidence interval for the mean PEF in children without chronic bronchitis.

Question
Asked Oct 14, 2019
34 views

An investigator conducts a study to investigate whether there is a difference in mean PEF in children with chronic bronchitis as compared to those without. There are 25 children without bronchitis in the sample, and they have a mean PEF of 319 with a standard deviation of 74. Construct a two-sided 95% confidence interval for the mean PEF in children without chronic bronchitis.

check_circle

Expert Answer

Step 1

Introduction:

The 100 (1 – α) % confidence interval for the population mean, μ, for given sample standard deviation, s is: ( – (/2; n – 1­) (s/√n), + (/2; n – 1) (s/√n)).

Here, n is the sample size, is the sample mean, and /2; n – 1 is the critical value of the t-distribution with (n – 1) degrees of freedom, above whic...

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in

Math

Statistics

Related Statistics Q&A

Find answers to questions asked by student like you
Show more Q&A
add
question_answer

Q: Determine whether the following statement makes sense (or  is clearly true) or do not make sense ( o...

A: As per the questionNo of males = 800No of females = 200It is not given out of 800 males and out of 2...

question_answer

Q: At the grocery store, Derek has narrowed down his selections to 3 vegetables, 6 fruits, 7 cheeses, a...

A: Introduction:Combination:Suppose there are n distinct items in a population. From these items, r dis...

question_answer

Q: Suppose that the probability that a passenger will miss a flight is 0.0995 Airlines do not like flig...

A: Binomial distribution:The binomial distribution gives the probability of number of successes out of ...

question_answer

Q: Researchers conducted a study to determine whether there were significant differences in graduation ...

A: a) Computation of probability that at least 13 of the students graduated in a randomly selected 14:I...

question_answer

Q: A Food Marketing Institute found that 42% of households spend more than $125 a week on groceries. As...

A: It was found that 42% of the households spend more than $125 on groceries.That is, the population pr...

question_answer

Q: Exhibit 5-8The student body of a large university consists of 60% female students. A random sample o...

A: Consider,X be a random variable that follows binomial distribution with probability of success 0.60 ...

question_answer

Q: Question 21, problem in photo!

A: Click to see the answer

question_answer

Q: Suppose that the probability of having a boy or a girl is 50%. Answer the following questions: What ...

A: Calculation: It is given that the probability of having a boy or a girl is 50%. Thus, the probabilit...

question_answer

Q: The probability that a person in the United States has type B+ blood is 11%. Five unrelated people i...

A: It is given that the probability that a person in the United States has type B+ blood is 0.11.