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 |

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.

- Subtract the confidence interval from 1, 1-0.9 = 0.1 to obtain the level of significance.
- Divide the obtained value by...

Tagged in

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

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...

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...

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...

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...

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 ...

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...

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...

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