Confidence intervals for sample distribution

Assignment Help Basic Statistics
Reference no: EM13104412

The average monthly electric bill of a random sample of 256 residents of a city is $90 with a standard deviation of $24.

a. Construct a 90% confidence interval for the mean monthly electric bills of all residents.

b. Construct a 95% confidence interval for the mean monthly electric bills of all residents.

Reference no: EM13104412

Questions Cloud

How mnc managers manage conflict : How do MNC managers manage conflict? Compare or contrast managing conflict resolutions using the instrumental-oriented conflict approach and the expressive-oriented conflict approach
Confidence interval for true proportion : What is a 99% confidence interval for the true proportion of dentists in the population that would make such a recommendation?
Constructing confidence intervals : A sample of 144 cans of coffee showed an average weight of 16 ounces. The standard deviation of the population is known to be 1.4 ounces.
Find the components of the net electric field : (a) Find the components of the net electric field at the origin. Ex = , Ey = (b) Find the magnitude and direction of the net electric field at the origin. |E| = at direction (from +x axis).
Confidence intervals for sample distribution : The average monthly electric bill of a random sample of 256 residents of a city is $90 with a standard deviation of $24.
Problem related to deer in a region carry a certain tick : Biologist estimates that 50% of the deer in a region carry a certain type of tick. For a sample of 300 deer selected at random, what is the chance that 155 or fewer deer have this tick?
Confidence interval for sample of 60 students : A sample of 60 students from a large university is taken. The average age in the sample was 22 years with a standard deviation of 6 years.
What is the function of a cell membrane : Why is the human body not an equipotential surface? What is the function of a cell membrane in this respect and what electrical device does it behave like?
Explain treatments for schizophrenia disorder : What you discovered interesting about this disorder (Schizophrenia); 2) possible etiology; 3) treatments for disorder.

Reviews

Write a Review

Basic Statistics Questions & Answers

  Continuous probablity distribution

Jon Molnar will graduate from Carolina Forest High School this year. He took the American College Test (ACT) for college admission and received a score of 30.

  Methods and random variables

Mention the experimental outcomes. Illustrate out a random variable threat that represents the number of heads occurring on the two tosses.

  Examining behaviour of critical values degrees of freedom

Examine the behaviour of 99% critical values for these degrees of freedom, and comment on the limits in this case.

  Statistics for behavioral sciences

An elementary school principal would like to know how many hours the students spend watching TV each day. A sample of n = 25 children is selected, and a survey is sent to each child's parents.

  What is the p-value and difference in means

What is the p-value and compute a 95% CI for the difference in means between the two groups?

  Significance level to determine the factors interactions

A statistics practitioner conducted a two-factor analysis of variance experiment with a =4, b = 3, and r = 8. The sum of squares are listed here:

  Define probability-sampling methods and confidence interval

Define probability and explain the three perspectives. Provide an example of each. Describe the difference between subjective and probabilistic sampling methods. What are the advantages and disadvantages of each?

  Reaction times for drivers reacting to incadescent lights

Automobile manufacturers are interested in the difference in reaction times for drivers reacting to traditional incadescent lights and to LED lights.

  Statistical concepts of anova-samples

What is an independent sample and what is a related sample? When should researchers use varying hypothesis tests for the different types of samples?

  Wilcoxon signed-ranks test and the wilcoxon rank-sum test

What is the difference between the Wilcoxon signed-ranks test and the Wilcoxon rank-sum test? no minimum word count.

  Find the probability function for x

Does your analysis change if the term "average" refers to the mean? To the median? Explain what effect this misinformation might have on the perception of the nation's schools.

  Boosting of sales and using social media online

What is the probability that the person thinks that "Made in America" ads boost sales and uses social media online?

Free Assignment Quote

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd