Width of ninety five percent confidence interval for mean

Reference no: EM1321250

Find the width of the 95% confidence interval for mean.

For a sample of 138 independent observations from a normal distribution of unknown μ and variance σ² = 2.6, the sample mean is 52.3. What is the width of the 95% confidence interval for μ?

(1) 0.269

(2) 0.538

(3) 6.3208

(4) 0.0116

(5) 0.0233

Reference no: EM1321250

Reviews

Write a Review

Message

Basic Statistics Questions & Answers

Probability in random selection

A recent census of a small town in Michigan showed that 60% of the residents are male, 20% have college degrees, and 15% are both male and college graduates.

Create a box-and-whisker plot

One of the main measures of the quality of service provided by any organization is the speed with that responds to customer complaints. A large family-held department store selling furniture and flooring, including carpet, had undergone a chief ex..

Questions based on scale of measurements

Identify each of the following variables are qualitative or quantitative

Determining probability of mutually exclusive events

Determine the following probabilities: Events A and B are mutually exclusive events defined on common sample space.

Predicting future values using exponential trend method

The sales manager had predicted, before the business started, that year 1's sales would be 410 air conditioners. Using exponential smoothing with a weight of alpha = 0.30, develop forecasts for years 2 through 6.

Relationship between job pressure and age

At the .01 significance level, is there a relationship between job pressure and age?

Testing condition in probability

Is there a significant difference the four testing conditions?

Discrete distribution by estimating the probability

What is the probability that both defective lights will be found within three trials?

Determining critical value using standard normal table

By using standard normal table, determine critical value (or values) for= 0.14 right-tailed test.

Determining percentages of calls which are completed

Fix-It Copiers advertises mean time of 100 minutes for office calls with standard deviation of 25 minutes. What percentages of calls are completed?

Setting up null hypothesis for associated f test

Set up null hypothesis for associated F test.

Compute a 95% confidence interval for the mean

Compute a 95% confidence interval for the mean using the formula and where is the mean of the ten random numbers.

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

User Account

All Pages