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Using the appropriate formula (in other words, show all your work), find the requested information for your assigned problem. Make sure to explain your rationale as to why you used a z-interval or t-interval. Again, SHOW ALL YOUR WORK!! Don't forget to interpret your solutions.
Below is the question that must be answered in detail.
You randomly select 16 coffee shops in Atlanta and measure the temperature of the coffee sold at each. The mean temperature of these 16 shops was 1620 F with a standard deviation of 100 F.
A) Find a 99% confidence interval for the mean temperature of coffee sold at all coffee shops in Atlanta.
B) If the sample size is doubled, repeat part A. What happened to the interval after the sample size was doubled?
If a population is known to be normally distributed with m = 250 and s = 40, what will be the characteristics of the sampling distribution for x based on a random sample of size 25 selected from the population?
Exponential smoothing with trend, with a smoothing constant of α = 0.2 and a trend smoothing constant of ß = 0.3, is being used to forecast values in a time series. At this point, the last two values have been 535 and then 550. The last two foreca..
What is the probability that no requests for assistance are in the system? What is the average number of requests that will be waiting for service? What is the average waiting time in minutes before service begins?
What is meant by an independent sample? What is a related sample? When should researchers use different hypothesis tests for independent and related samples?
1. a medical researcher contends that lung capacity varies significantly between smokers and nonsmokers. the mean
The cholesterol levels are rechecked after a 1-month period. Does this study involve independent samples or dependent samples?
a local university administers a comprehensive examination to the recipients of a b.s. degree in business
a box contains 3 marbles 1 red 1 green 1 blue. consider an experiment that consists of taking 1 marble from the box
the probability that a 52-year-old white male will live another year is .99386. what premium would an insurance company
the auto parts department of an automotive dealership sends out an average of 8 special orders daily. the number of
at most restaurants the more food you order the more money you have to pay. there are however many instances where you
Many colleges and universities develop regression models for predicting the GPA of incoming freshmen. This predicted GPA can then be used to make admission decisions. Although most models use many independent variables to predict GPA, we will illu..
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