Determine sample size to use for survey

Assignment Help Basic Statistics
Reference no: EM13112252

You are asked by owner of Starshine Motel to create the customer satisfaction survey to find out the percentage of customers who are dissatisfied with service. In past year, 20,000 customers were serviced. She wants 95% level of confidence with the allowable statistical error of +/- 0.02. From past estimates, manager thinks that about 4% of customers have expressed dissatisfaction. What sample size must you use for this survey?

Reference no: EM13112252

Questions Cloud

Determine the primary concept of hazard recognition : A mechanic in an automotive repair shop is exposed to the following carbon monoxide levels over an 8 hour shift.
How can this be reconciled with the fact that enzymes : Imagine this situation: Species #1 and Species #2 are unrelated, but each produces an enzyme capable of hydrolyzing soybean oil. How can this be reconciled with the fact that enzymes are highly specific to their substrates?
Determining de broglie wavelength : We use Use the De Broglie wavelength formula, ohr radius definition and wave-particle duality equation to compute the wavelength of,
Symmetric distribution-simple random paired sample : In performing a hypothesis test based on a simple random paired sample to compare the means of two populations, knowing that the paired difference variable has a symmetric distribution that is far from normal
Determine sample size to use for survey : From past estimates, manager thinks that about 4% of customers have expressed dissatisfaction. What sample size must you use for this survey?
Is the inability of this medium to distinguish : Many organisms possessing many different lipases produce positive results on Tributyrin Agar. Is the inability of this medium to distinguish between these different enzymes a weakness in its specificity or its sensitivity?
Test of hypothesis for difference between means : A study was conducted of the annual incomes of beginning probation officers in metropolitan areas of less than 100,000 population and in metropolitan areas having more than 500,000 population.
How ppf presents a strong rationale for the plausibility : Illustrate with a graph how the PPF presents a strong rationale for the plausibility of the law of supply and supply and demand graphs indicating the change in equilibrium price and quantity.
Value of linear correlation coefficient : A supplier of 3.5" disks clams that only 1% of the disks are defective. In a random sample of 600 disks, it is found that 3% are defective, but the supplier claims that this is simply a sample fluctuation. At the 0.01 level of significance, test t..

Reviews

Write a Review

Basic Statistics Questions & Answers

  T-critical value and standard error of the sample mean

The sample mean is 50, the t-critical value is 1.96, and the standard error of the sample mean is 2.

  Statistical cause and effect

Psychologists wanted to test whether a certain accelerated class' IQ was different than average. There were 25 students in the class; their mean IQ score was 108.

  Probability that the quarter has high productivity growth

Suppose that a quarter is randomly selected, what is the probability that this quarter has high productivity growth and has a large pay increase?

  Estimating the mean score for gmat scores

How many students should be surveyed to estimate the mean score within 25 points with 90% confidence?

  Determining if z follows standard normal distribution

Determine following probabilities where Z follows standard Normal distribution?

  Compute standard normal z-score corresponding to value

Compute standard normal z-score corresponding to value of x = 23. e. Determine P(x 23). G. Determine P(16

  Spatial scan statistic used in satscan

Where does the p-value come from for the spatial scan statistic used in SaTScan? How Monte Carlo simulation is used to derive a p-value for a cluster ?

  Probability of two mutually exclusive events

Probability of two mutually exclusive events intersecting Can be any value between 0 to 1, Must always be equal to 1.

  Five step procedure for student t test

Experience raising New Jersey Red chickens revealed the mean weight of the chickens at five months is 4.35 pounds. The weights follow the normal distribution.

  Use critical value method to find evidence

Is there evidence that mean dimension is not 221 mm? Suppose population is normally distributed. Use a=0.05 and critical value method.

  Interpretation of the decision

A hospital human resources manager finds that the local average starting salary for nurses is $24,000. She randomly samples 10 nurse's salaries at the hospital and calculates a mean of $23,450 and a standard deviation of $400.

  Given random variable is binomial distribution or not

Confirm whether given random variable is binomial distribution or not. If this experiment is finished with replacement, explain why.

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