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Nick happens to be an amateur statistician in his free time. To get an idea of the popularity of sports cards, he does a simple random sample of all cities with populations of at least 50,000 and determines the number of sports cards shops in each city. He samples 20 cities and finds the average number of card shops to be 1.7. A popular sports card magazine reports that, historically, the standard deviation of the number of shops in large cities is 0.4. Answer the following:
A) Before doing any analysis, what can Nick do to evaluate whether the data is normally distributed?
B) Find a 95% confidence interval for the true mean number of card shops in large cities.
C) Interpret your confidence interval in part B.
Give a real world example of a situation where normal parametric tests would not be useful and where there is a need for nonparametric test methods. Be specific and explain why nonparametric tests are needed in that case.
question according to the u.s. bureau of labor statistics 75 of the women 25 through 49 of age participate in the
Create a hypothesis and perform a series of tests to determine if there is any fundamental difference in the findings.
If the supermarket begins each morning with a stock of 61 cartons of eggs, approximately what percentage of days will there be a surplus of eggs?
a small gasoline station next to an interstate highway is open for 24 hours per day and has one pump and room for two
A wildlife biologist captures a certain species of geese in orer to weigh them. Using science, he determines that the weights are normally distributed with a mean of nine pounds and a standard deviation of 1.3 pounds.
Each,day Monday through Saturday, a baker bakes three large chocolate cakes and those not sold on the same day are given away to a food bank.
a study of the time spent shopping in a supermarket for a market basket of 20 specific items showed an approximately
Various temperature measurements are recorded at different times for a particular day. the mean of 20 degrees C is obtained for 40 temperatures on 40 different days. Assuming that the standard deviation = 1.5 degree C, test the claim that the populat..
State the Null Hypothesis and the Alternative Hypothesis
What are the advantages of ANOVA over the mean test and what are the disadvantages? Where would I use this in my everyday life?
A random sample of 16 federal inmates is selected. What is the probability that exactly 12 are serving time for drug dealing?
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