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In a population, 11% of the people are left handed. In a simple random sample of 160 people selected from this population, the proportion of left handers is 0.10. What is the number of left handers in the sample and what notation is given to that number?
In this problem I am having an issue trying to determine what equation to use to solve. Is this a one or two way ANOVA or should I just use a z-test to solve?
What was the success probability of each O-ring?
The mean amount purchased by a typical customer at Churchill's Grocery Store is $23.50 with a standard deviation of $5.00. Assume the distribution of amounts purchased follows the normal distribution. For a sample of 50 customers, answer the follo..
Find the probability that a randomly selected employee earns less than $5.43.
Write matlab Code for regression. one paragraph discussion of the project comprising method used and conclusions: regression results
The national average for the price of a gallon of unleaded regular gas is $1.16. I believe the price is higher in my area of the country. I want to test my claim by randomly selecting gas prices for 25 stations in my area. The following prices are..
For the last 18 review periods the average sales figure has dropped to $11,500 with a standard deviation of $4,000. Management is concerned. Perform a hypothesis test to determine if this change in sales is a potential problem.
Would this be a T-value distribution? Can you take me through the steps to determine upper and lower limits of a 95% confidence interval?
The world's smallest mammal is the bumblebee bat. Shown to the right are weights(in grams) from a sample of those bats. Use the traditional method and significance level of .05 to test the claim that these bats come from the same population having..
Using standard normal table, show critical value for left-tailed test with α = 0.02.
Big Time Software Co. has developed a new version of it XD-3 software. They want to determine if the new version of XD-3 is faster then the old version.
A man is in the process of buying a new car. He has a choice of 3 engine makes, 7 body styles and 10 colors. How many different cars does he have to choose from?
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