Suppose the heights of a population of men are normally distributed with an unknown population mean and a population standard deviation of 2.4  inches. A random sample of men from the population produces a sample mean  height of x ¯ =68.2  inches.What value of z  should be used to calculate a confidence interval with a 90%  confidence level?z 0.10  z 0.05  z 0.025  z 0.01  z 0.005  1.282 1.645 1.960 2.326 2.576

Question
Asked Sep 25, 2019

Suppose the heights of a population of men are normally distributed with an unknown population mean and a population standard deviation of 2.4  inches. A random sample of men from the population produces a sample mean  height of x ¯ =68.2  inches.

What value of z  should be used to calculate a confidence interval with a 90%  confidence level?

z 0.10   z 0.05   z 0.025   z 0.01   z 0.005  
1.282  1.645  1.960  2.326  2.576 
check_circle

Expert Answer

Step 1

The provided confidence interval is 90%. The z-value is obtained using Excel.

Step 2

Follow the below steps to obtain the z-value corresponding to the 90% confidence level.

  1. Subtract the confidence interval from 1, 1-0.9 = 0.1 to obtain the level of significance.
  2. Divide the obtained value by...
fox
NORMSINV(1-0.05)
E
F
1.645
help_outline

Image Transcriptionclose

fox NORMSINV(1-0.05) E F 1.645

fullscreen

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

Data

Related Statistics Q&A

Find answers to questions asked by student like you

Show more Q&A add
question_answer

Q: Calculate without using a calculator (Give your answer as a whole or exact number.) 92 log144 (12)

A: The power rule of logarithm is shown below

question_answer

Q: How do I find the variance for a math problem

A: Introduction:The variance of a set of observations is the average of the sum of squared deviations f...

question_answer

Q: Assume that every patient with a particular type of disease has probability 0.1 of being cured withi...

A: Consider X as the number of successes (patients being cured) out of the n = 10 trials (patients). Th...

question_answer

Q: I don't understand how to solve this problem. I tried sovling it as B=0.91 and A=0.88. Therefore (0....

A: Given DataLets B denotes flight departureA denotes flight ArrivalProbability that an airplane depart...

question_answer

Q: I need help with question 1

A: The provided data is arranged in order from smallest to largest consists of total 22 (n) observation...

question_answer

Q: Listed below is a table showing the number of employed and unemployed workers 20 years or older by g...

A: Introduction:The number of unemployed workers includes both male and female unemployed workers. The ...

question_answer

Q: 1) Let RVs X and Y have the following joint pdf:   a) Determine and plot the marginal pdfs f(x) and...

A: Note:Hey there! Thank you form the question. We have plotted the marginal pdf’s with the help of a g...

question_answer

Q: The following are six observations collected from treatment 1, four observations collected from trea...

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

question_answer

Q: Records over the past year show that 1 out of 345 loans made by Mammon Bank have defaulted. Find the...

A: Click to see the answer