The length, in words, of the essays written for a contest are normally distributed with a population standard deviation of 442 words and an unknown population mean. If a random sample of 24 essays is taken and results in a sample mean of 1330 words, find a 99% confidence interval for the population mean. Z0.10Z0.05Z0.025 Z0.0 Z0.005 1.282 .645 .960 2.326 2.576 You may use a calculator or the common z values above. Round the final answer to two decimal places, Sorry, that's incorrect. Try again? 0

Question
The length, in words, of the essays written for a contest are normally distributed with a population standard deviation of
442 words and an unknown population mean. If a random sample of 24 essays is taken and results in a sample mean of
1330 words, find a 99% confidence interval for the population mean.
Z0.10Z0.05Z0.025 Z0.0 Z0.005
1.282 .645 .960 2.326 2.576
You may use a calculator or the common z values above.
Round the final answer to two decimal places,
Sorry, that's incorrect. Try again?
0

Image Transcription

The length, in words, of the essays written for a contest are normally distributed with a population standard deviation of 442 words and an unknown population mean. If a random sample of 24 essays is taken and results in a sample mean of 1330 words, find a 99% confidence interval for the population mean. Z0.10Z0.05Z0.025 Z0.0 Z0.005 1.282 .645 .960 2.326 2.576 You may use a calculator or the common z values above. Round the final answer to two decimal places, Sorry, that's incorrect. Try again? 0

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

Other

Related Statistics Q&A

Find answers to questions asked by students like you.

Q: Please answer the whole question.  (1) Let x be the age in years of a licensed automobile driver. Le...

A: Hello there! There are more than three sub parts in the given question. According to our policies ca...

Q: An executive believes that a new energy drink his company developed will increase an individual's st...

A: Paired t-test statistic results:For testing whether the new energy drink increase an individual’s st...

Q: Let’s say you have a study looking at the DV “Time to help”. Your IV is whether potential helpers di...

A: Cohen's d is a type of  effect size that represents the degree to which a null hypothesis is false. ...

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 much does a sleeping bag cost? Let's say you want a sleeping bag that should keep you warm in te...

A: (a)Using the provided data, the sample mean and standard deviation can be calculated using Excel fun...

Q: Hospitals typically require backup generators to provide electricity in the event of a power outage ...

A: Independent events:If A and B are two independent events, the probability of the event A and B can b...

Q: Need all parts, a,b,and c Let X denote the data transfer time (ms) in a grid computing system (the t...

A: (a) Finding the values of α and β :The random variable X represents the data transfer time in a grid...

Q: Question B

A: B)The variables whose level are set by the experimenter is the independent variable, which is called...

Q: Linear Programming Problem A manufacturer of three models of tote bag must determine the production ...

A: This can be solved using Solver tool in Excel. Go to Data tab in Excel and check if you see Solver u...