Determining sample size requirements

Reference no: EM1389913

The research department of a movie theatre chain wants to conduct a satisfaction survey at some of the theatres to determine how satisfied customers are with the theatre in which they just saw a movie and how much they spent (tickets, popcorn, etc.) Several questions will be asked but the main outcome measure of interest will be the percentage of customers who were completely satisfied and plan to return and the average amount spent. A few years ago a similar survey was conducted and it found that customers had seen an average of 5 movies at the theatre, had spent an average of $25, and 80% were completely satisfied and planned to return. The results also revealed that about two-thirds of the respondents spent anywhere from $15 to $35.

a) Determine sample size requirements. When the results are available you would like your margin of error to be plus or minus 5% for the satisfaction measure and plus or minus $1.50 for the spending value. The results should be accurate at the 95% confidence level. (Hint: Pick the sample size that satisfies all the requirements.)

b) Unfortunately, a full response is not expected. Some customers will be in a hurry after exiting the theatre and will not respond to the survey. Assuming the non-response rate is 10%, how would you adjust for this in your sampling plan?

Reference no: EM1389913

Questions Cloud

Performing the indicated test of hypothesis : Perform the indicated test of hypothesis. HO: M 7, given x= 0.01, N=25, Xbar = 7.019 and SD is =.1681. Assume the sample is selected from a normally distributed population.

Increase in plasma concentration of sodium or potassium : Determine which do you think would have the most serious effect, and why: a 5 mEq/L increase in the plasma concentration of sodium, potassium, chloride, or calcium?

Probability of a type one error : What is the probability of a type 1 error in this situation? What does it mean?

Original puc plasmids : The pUC series plasmid contains LacZ gene with multiple cloning site. Suppose if you insert a piece of DNA into this LacZ gene, how will you tell which one is your recombinant.

Determining sample size requirements : Determine sample size requirements. When the results are available you would like your margin of error to be plus or minus 5% for the satisfaction measure and plus or minus $1.50 for the spending value.

Two cells differ in abundance : 2-cells vary in the amount of energy they need. One cell, a muscle cell, must generate large supplies of ATP. The other cell, a skin cell, requires very little ATP.

Distribution of sentence lengths : In a distribution of sentence lengths in months like the following: 6, 12, 10, 18, 24, 360; which statistic would a researcher not want to report?

Channels in the membranes affect the sign : Discuss how would an increased number of Na+ leak channels in the membranes affect the sign and magnitude of the RMP? Justify your answer.

Preference of an anova over a t-test : Comment on your statistical findings? Do you agree with your initial statement regarding the preference of an ANOVA over a t-test when examining more than two groups?

User Account

All Pages