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Candies manufactured by Cherrie Chocolate Candies Co, are supposed to weigh at least 2.00 ounces. A sample of 100 candies yields the following results.
Sample mean: 1.98 ounces
Sample standard deviation: 0.10 ounces
Does the sample data present sufficient evidence to conclude that the average weight is in fact less than 2.00 ounces (using alpha = 0.05)
1. Formulate the null and alternative hypotheses.
2. Determine the criterion for rejection or non-rejection of the null hypothesis.
3. Calculate the test statistic.
4. Compare the test statistic to the rejection region and make a judgment about the null and alternative hypotheses.
5. Interpret the statistical decision in terms of the problem.
6. Compute the observed "p" value in the hypothesis test and interpret this value. What does this mean?
An experimental study is designed to test the potency of a drug on 16 calves. Previous studies have shown that a 10-mg dose of the drug is lethal 7% of the time within the first 7 hours.
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Given the hypothesis Ho: u=400, you conduct a sample of 12 observations and obtain a sample mean of 407 and a sample standard deviation of 6. Using a .01 significance level to test to see if you would reject Ho, what would be the value of your cri..
Find out the correlation among the two variables in the regression. A simple linear regression produced the following computer output.
An article in Baltimore Sun claimed that the typical supermarket trip takes a mean of 22 minutes. Suppose that in an effort to test this claim, you select a sample of 50 shoppers at a Baltimore City Giant.
Would it be reasonable to conclude that the population mean is 63 pounds?
What is the probability that an improperly adjusted machine will produce five or more items before it is stopped? What is the average number of items an improperly adjusted machine will produce before being stopped?
Consider the following data values of variables x and y. The equation of the least-squares regression line for this data is
Using smoothing constant of w = .80, compute the value of exponentially smoothed series in 1983.
Critically illustrate out the purpose of developing frequency distribution? Describe the relationship between the relative frequency and the cumulative frequency.
If average size in square feet of homes built is 1810, determine maximum and minimum sizes of homes contractor must build. Suppose that standard deviations are 92 square feet.
A recent study conducted by the state government attempts to determine whether the voting public supports further increase in cigarette taxes.
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