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Suppose we receive 75% of a certain part from Vendor A and 25% from Vendor B. Vendor As defect rate is 0.01 and Vendor Bs defect rate is 0.03. What is the probability that a randomly selected part will be a defective part from Vendor B?
Suppose that 10 years ago the average annual expense for stock funds was 1.19 percent. Let µ be the current mean annual expense for all stock funds, and assume that stock fund annual expenses are approximately normally distributed.
For the preceding problem you should find that there are significant differences among the three treatments. One reason for the significance is that the sample variances are small.
For the following situation, assume the random variable is normally distributed and use a normal distribution or a t-distribution to construct a 90% confidence interval for the population mean. If convenient, use technology to construct the confid..
State the decision rule for .05 significance level. (Round your answer to 3 decimal places.)
Test at .01 level of significance if mean number of number of calories for Brand A 16 oz. yogurt cups is greater than mean calories for Brand B 16 oz. yogurt cups.
The heights of 40 randomly selected people and the heights of their mothers are recorded. Statdisk is used to run a linear correlation and regression analysis. The partial results are provided below:
In a sample of 60 mice, a biologist found that 46% were able to run a maze in 30 seconds or less. Find the 99% limit for the population proportion of mice who can run that maze in 30 seconds or less?
Determine the probability of a positive economic trend given an increasing employment. Are employment and economic trend independent?
A sociologist interested in cultural differences compared women of two ethinic groups on a Role Approval Index. If you conduct a t test for independent means, how many degrees of freedom are in the t distribution?
The probability that during a sample of four (4) fishing days, the weight of the daily catch will be between 109 tons and 151 tons is?
Conduct a one-tailed hypothesis test given the information below. A certain brand of fluorescent light tube was advertised as having an effective life span before burning out of 4000 hours.
Assume that the distribution is normal. Based on the Empirical Rule, how many students scored between 69 and 89?
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