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Q1. A small town has a population of 20,000 people. Among these 1,000 regularly visit a popular local bar. A sample of 100 people who visit the bar is surveyed for their annual expenditures in the bar. It is found that on average each person who regularly visits the bar spends about $2000 per year in the bar with a standard deviation of $200. Construct a 99 percent confidence interval around the mean annual expenditure in the bar.
Q2. The production manager for the XYZ manufacturing company is concerned that the customer orders are being shipped late. He asked one of his planners to check the timeliness of shipments for 1000 orders. The planner randomly selected 1000 orders and found that 100 orders were shipped late. Construct the 99% confidence interval for the proportion of orders shipped late.
Q3. The weight of a product is measured in pounds. A sample of 49 units is taken from a batch. The sample yielded the following results: = 80 lbs. and s = 10.5 lbs. Calculate a 90 percent confidence interval for the mean.
An orange juice producer buys only one kind of oranges. The amount of juice squeezed from each of these oranges is approximately normally distributed with a mean of 4.2 ounces and a population standard deviation of 1 ounce.
The lifetime of a super tough AAA battery is normally distributed wit mean of 28.5 hours and standard deviation of 5.3 hours. For a battery selected at random
1.an experiment was conducted to determine the effects of three different pesticides p1p2p3 on the yield of three
There are two boxes, Box A and Box B. Box A has 40 tags with the number 1, 50 tags with the number 10, and 10 tags with the number 100. Box B has 40 tags with the number 100, 50 tags with the number 10, and 10 tags with the number 1.
Use the Internet or other resources to find an example of a research article in a professional journal of interest to you, and not in daily periodicals or weekly publications. Prepare a synopsis of the article including the following:
The Kirschner Company has a contract to produce garden hoses for a customer. Kirschner has 5 different machines that can produce this kind of hose. Write the constraint that indicates they have to use at least three of the five machines in their p..
State the null and alternate hypotheses if you want to determine whether the mean amount spent is higher for men than for women,
The length of country and western songs is normally distributed and has a mean of of 170 seconds with a standard deviation of 49 seconds.
What is the standard deviation of the sampling distribution of p(hat) the proportion of all rolls of the die that show a 1 or a 2? 3.) describe the shape of the sampling distribution of p(hat).
In a study of hypnosis, breathing patterns were observed in an experimental group of subjects in a control group. The measurements of total ventilation (liters of air per minute per square meter of body area) are shown below.
Please state the steps used to perform a hypothesis test on the coefficient of correlation and provide a detailed example. Details are greatly appreciated!
What is the probability of randomly selecting a person who is conservative and then selecting from that group someone who is a nursing major?
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