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A sandwich shop owner takes a daily sample of seven consecutive sandwich orders at a random time during the lunch rush and records the time it takes to complete each order. Past experience indicates that the process mean should be μ = 88 seconds, and the process standard deviation should be σ = 24 seconds.
Calculate the center line and control limits for an x control chart. (Round your answers to two decimal places.)
LCL=_____
UCL=____
34?% of women consider themselves fans of professional baseball. You randomly select six women and ask each if she considers
Is there evidence that the waiting time at this particular restaurant is less than 3.7 minutes? Use a 1% level of significance. What is your conclusion?
If one item is chosen at random, determine these probabilities. It is a TV
1. Find the two-sided 95% confidence interval for the quality difference. Is there a significant difference in quality? How do you know?
a machine that cuts corks for wine bottles operates in such a way that the distribution of the diameter of the corks
consider the uniform rectangular distribution on the space a b wherea lt b with p.d.f. fx 1 b - a a ltx lt ba obtain
(a) What are the null and alternate hypotheses? (b) What is the level of significance? (c) What is the standard error?
In an automatic geolocation system, a dispatcher sends a message to six trucks in a fleet asking their locations. The waiting times for responses from the six trucks are iid exponential random variables, each with expected value 2 seconds.
You're a risk manager of ABC company and you are reevaulating your insurance contract. Your insurer has informed you that the expected value of frequency per month for ABC is 2.43.
Compute the present value of a $3,600 deposit in year 2 and another $3,100 deposit at the end of year 4 if interest rates are 9 percent.
Post-hoc fallacy is that condition where regression shows a high degree of correlation (R square is high), but there is no real cause-effect relationship between the independent and dependent variables.
In your capacity as assistant sales manager for a large office products retailer, you have been assigned the task of interviewing purchasing managers for medium and large companies in the San Francisco Bay area.
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