Find confidence interval within which population mean lies

Assignment Help Basic Statistics
Reference no: EM13134811

A random sample of 85 group leaders, supervisors, and similar personnel revealed that on the average a person spent 6.5 years on the job before being promoted. The standard deviation of the sample was 1.7 years. Using the 0.95 degree of confidence, what is the confidence interval within which the population mean lies?

Reference no: EM13134811

Questions Cloud

Briefly discuss the operating performance and financial : Briefly discuss the operating performance and financial position of Sepracor. Industry averages for these ratios in 2007 were: ROA 3.5%; return on equity 16%; and debt to assets 75%. Based on this analysis would you make an investment in the compa..
Explain what is the bond order of the neutral cn : Do you expect CN- anion to be affected by a magnetic field? Explain your reasoning. (d) What is the bond order of the anion CN- ? (e) What is the bond order of the neutral CN?
What is bank of america corporation percentage : What is Bank of America Corporation's percentage of the accounts receivable balance to total assets for the last two years? If the ratio percentage has changed what accounts for the change?
Real-life applications of geometry : What do we gain by studying geometry? Do you see any geometric concepts being used in your area of expertise or in your day-to-day experiences? Explain
Find confidence interval within which population mean lies : The standard deviation of the sample was 1.7 years. Using the 0.95 degree of confidence, what is the confidence interval within which the population mean lies?
Compute the estimated cost of the ending inventory for each : Compute the estimated cost of the ending inventory for each department under the retail inventory method. (Round computations and final answers to 0 decimal places, e.g. 125.)
What is the inventory period : garnishes, inc has sales for the year of $46,300 and cost of goods sold of $21,700. the firm carries an average inventory of $4,800 and has an average accounts payable balance of $4.400. what is the inventory period?
Find out the depreciation expense : Gardner Corporation purchased a truck at the beginning of 2010 for $75,000. The truck is estimated to have a salvage value of $3,000 and a useful life of 120,000 miles. It was driven 18,000 miles in 2010 and 32,000 miles in 2011. What is the depre..
How many days on average does it take the firm to collect : jenny's has annual sales of $367,200 and cost of goods sold of $198,600. the average accounts receivable balance is $16.400. how many days on average does it take the firm to collect its accounts receivable?

Reviews

Write a Review

 

Basic Statistics Questions & Answers

  Forecasting-the historical data, replicating the appropriate

The project requires you forecast the historical data, replicating the appropriate trends, seasonalities, week-over-week variability, etc.  Please refer to the chapter and materials on Forecasting for the procedures to do.

  Determine cutoff score which normally distributed with mean

The scores are normally distributed with a mean of 165 and a standard deviation of 17. If only the top 20% of the soldiers are selected, what would the cutoff score be?

  Cloud seeding increases rainfal

Clouds were randomly seeded or not with silver nitrate. Rainfall amounts were recorded from the clouds. The purpose of the experiment was to determine if cloud seeding increases rainfall. The following data is obtained:

  Probability that follows binomial distribution

Find the probability that follows Binomial distribution.

  Determine sampling distribution of sample mean

A normal population has a mean of 75 and a standard deviation of 5. You select a sample of 40. Compute the probability the sample mean is

  Independent sample t test-question

A study is conducted to compare mean cholesterol levels for individuals following a low carbohydrate diet for at least 6 months to individuals following a conventional (low fat, low calorie )diet for at least 6 months.

  Find the total revenue at break even point

With a selling price of 40 dollars each, how many pool cues must be sold to break even? What would the total revenue be at this break even point?

  Concepts in hypothesis testing

A p-value of 0.82 obtained for a particular hypothesis test would indicate strong evidence that the null hypothesis is true. Discuss.

  Compute mean-variance and squared coefficient of variation

Consider random variables X and Y with a joint pmf, given in the following table. Compute the conditional expectations E[X|Y = 1] and E[X|Y > 1].

  Determining non parametric tests

Assume that each of the following studies cannot be analyzed using a parametric procedure. For each of the following studies (below), indicate the appropriate nonparametric procedure, and explain why you chose it.

  Compute the probability both are carriers

Arbitarily sampling one man and one woman from this population, determine probability neither is a Tay-Sachs carrier? Compute the probability both are carriers?

  Approximate one-sided lower confidence limit for theta

Note that under the exponential assumption, P(X>t) = exp(-t/theta). If t=5, use the result from (a) to find an approximate one-sided lower 95% confidence limit for theta.

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