Find confidence interval for standard deviation

Assignment Help Basic Statistics
Reference no: EM13118120

Find the 90% confidence interval for the standard deviation for the time it takes an inspector to check a bus for safety if a sample of 27 buses has a standard deviation of 6.8 minutes.

Reference no: EM13118120

Questions Cloud

Online education compared to on-ground education : Write on topic Online education compared to on-ground education
Calculate the molar concentration of oh - ions : Calculate the molar concentration of OH - ions in an 1.43 M solution of hypobromite ion, BrO- (Kb = 4.0 10-6).
Example of a non-linear equation : Explain why there are usually two solutions in quadratic equations? Please also share an example of a non-linear equation applied to a real life problem?
Calculate the mass percent of a solution : Calculate the mass percent of a solution that is prepared by adding 32.2 g of NaOH to 262 g of H2O.
Find confidence interval for standard deviation : Find the 90% confidence interval for the standard deviation for the time it takes an inspector to check a bus for safety if a sample of 27 buses has a standard deviation of 6.8 minutes.
What constitutes a rational expression : What constitutes a rational expression? Please give an example for reference. How would you explain this concept to someone unfamiliar with it?
How much heat is evolved : How much heat is evolved when 1235 g of water condenses to a liquid at 100°C? ΔHcond = -40.7 kJ/mol.
Determine domain and range of quadratic equation : Trying to find the domain, range and graph the following quadratic equation:f(x)=(x+4)^2-9
Find probability that each of the six chips is red : A bowl contains 20 chips, of which 9 are red, 8 are white and 3 are blue. Six chips are taken at random and without replacement. Find the probability that each of the 6 chips is red.

Reviews

Write a Review

Basic Statistics Questions & Answers

  Minimizing cost of meeting demands

Find out how to minimize cost of meeting demands in Houston and Tampa.

  Find the 33rd percentile of the distribution of lifetimes

The distribution of lifetimes for a certain type of light bulb is normally distributed with a mean of 1000 hours and a standard deviation of 100 hours. Find the 33rd percentile of the distribution of lifetimes.

  Calculating probability values using binomial distribution

Determine the probability that exactly 8 of them started smoking before 18 years of age.

  List the reasons for sampling

hat is sampling error? Could the value of the sampling error be zero? If it were zero, what would this mean? List the reasons for sampling. Give an example of each reason for sampling.

  Evaluate the slope of the least-squares regression line

If we fit the least-squares line to the 12 data points (one for each month) we obtain the following results from a software package. Notice that temperature is taken as the explanatory variable and crawling age as the response.

  Upper bound or limit of confidence interval

The superintendent of a unified school district of a small town wants to make sure that no more than 5% of the students skip more than 10 days of school in a year.

  Estimate the pearson correlation coefficient

Explain the logic of what you have done, writing as if you are speaking to someone who has never heard of correlation (but who does understand the mean, deviation scores, and hypothesis testing);

  Evidences to reject the claim

A random sample of 24 groups of adults has a mean daily lodging cost of $233 and a standard deviation of $12.50. Is there enough evidence to reject the claim at α= 0.10? Assume the population is normally distributed.

  Personnel files choose to evaluate with confidence interval

Sample mean is 12.2 days and sample standard deviation is 10 days. How many personnel files would director have to choose to evaluate to within 2 days with 99% confidence interval?

  Data source generating hexadecimal characters

A data source generates hexadecimal characters. Let X be the integer value corresponding to a hex character. Suppose that the four binary digits in the character are independent and each is equally likely to be 0 or 1.

  Determining mean of money withdrawn from atms

If random sample of thirty six customer transactions points out that sample mean withdrawal amount is $172, is there evidence to think that population mean withdrawal amount is no longer $160? Determine the mean of data above?

  Sample of miniature tootsie rolls

A random sample of 10 miniature Tootsie Rolls was taken from a bag. Each piece was weighed on a very accurate scale. The results in grams were:

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