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A bottling company is supposed to fill bottles with an average weight of 16 ounces. The company randomly selects several bottles and weighs the liquid. How large of a sample must be taken so that the half-length of a 95% confidence interval is 0.1 ounces? It is assumed that the population standard deviation is 0.25 ounces?
Develop a 99% confidence interval for the population proportion.
An apple juice producer buys all his apples from a conglomerate of apple growers in one northwest state. The amount of juice squeezed from each of these apples
the amount of unused sick time for individual employees is uniformly distributed between 0 and 480 minutes. Based on this information, what is the probability that an employee will have less than 20 minutes of unused sick time?
kindergarten children have heights that are approximately normally distributed about a mean of 39.7 inches and a
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 foll..
The accounting association has 15 members, 10 of which are CPAs. The members are to be selected to study ways to increase membership. What is the probability of all three selected are CPAs?
Calculate the mean and standard deviation of the sample mean based on data from 100 stores.
Mean output of solar cells of three types are measured six times under random light intensity over a period of 5 minutes, yielding the results shown. Research question: Is the mean solar cell output the same for all cell types?
a sales representative must visit six cities. there are direct air connections between each of the cities. use the
Test the claim by random sampling 60 hgh school boys. Researcher found 54 boys have a cell phone at a = 0.01. Should the claim be rejected?
Bob enjoys making candy and some friends have encouraged him to open a candy-making business. To see if the local citizens buy enough candy,
Is there sufficient evidence to support the claim that site has an effect on the amount of pesticide?
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