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A local drugstore owner knows that, on average, 100 people per hour stop by his store. Find the probability that in a given 3 minute period, more than 5 (P(x > 5) people enter the store.
A random sample has been taken from a normal distribution and the following confidence intervals constructed using the same data: (38.02, 61.98) and (39.95, 60.05). What is the value of the sample mean?
Calories in each hamburger measured. Can the reporter conclude, at α = 0.05, that the hamburgers from the two chains have a different number of Calories?
Create a dot plot and a box plot to represent this data. If we create a sample by picking every 3rd data from the population, how would your answer to part a change? Show your work
What is the average time that catalog customers must wait before their calls are transferred to the order clerk? (b) What is the average number of callers waiting to place an order?
Find the expected frequency for each cell and compute X stat square? Is it significant at alpha-0.05?
When I watch the weather on TV it makes me crazy that they will talk about the "average" or "normal" temperature. When they say "average" on TV weather to which of the "averages" discussed in the text are they referring?
Overall, the students' class attendance days (per year academic) is normally distributed around 180 days with a standard deviation of 15 days. What's the probability that the mean number of attendance days will be between 190 and 200?
A month later, the reading skills of all 100 students are assessed to determine whether the program was successful. What are the two populations of interest in this study?
Suppose that your sample mean is 1175 and that your sample standard deviation is 100. Using α=0.05, what is the appropriate conclusion you should draw from your sample?
You are trying to determine the statistical significance of an equation. Given the following information, test the slope of the equation at the 95% level of confidence.
Using the p-value approach, test the hypotheses at the 1% level of significance.
Chocolate bars produced by a certain machine are labeled with 16.0 oz. The distribution of the actual weights of these chocolate bars is Normal with a mean of 16.1 oz and a standard deviation of 0.1 oz. A chocolate bar is considered underweight if..
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