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Based on the 2000 Census, 31.8% of grandparents in California are the primary caregivers for their grandchildren Suppose n = 1000 persons are to be sampled from this population and the sample proportion of grandparents as primary caregivers(p-hat) is to be calculated. What is the standard deviation of the sampling distribution of p-hat?
Write complete linear programming model (All three parts) to find out the number of items to be transported from models A, B, C, and D to nodes 1 and 2 at minimum cost.
We want to test the hypothesis about fairness of spinning the coin. Evaluate the true proportion of heads. Use 95% confidence interval. Do not forget to check conditions first.
Each party's position must be statistically sound. Include as suitable graphs, computations, and statistical tests.
The bank wishes to inform prospective customers that '99 times out 100 we can process your application in q working days'. Assuming that the normal distribution is still an adequate model, calculate q.
A supplier of 3.5" disks clams that only 1% of the disks are defective. In a random sample of 600 disks, it is found that 3% are defective, but the supplier claims that this is simply a sample fluctuation. At the 0.01 level of significance, test t..
Suppose a survey item asks someone if something is very important, somewhat important, not very important, or unimportant. This is an example of what level of measurement?
A researcher plans to compare two treatment conditions by measuring one sample in treatment 1 and a second sample in treatment 2. The researcher will then compare the scores for the two treatments. If there is a difference between the two groups o..
At the .10 significance level, can we conclude that there is a difference in the length of time the two types of treatment lasted?
Aa mean of 72 mph and a standard deviation of 3 mph. Find the interval that contains the sppeds of 95% of vehicles traveling on this section of i-95.
Using the given data set, find (a) the sample mean, (b) the sample standard deviation, (c) construct a 98% confidence interval for the population mean μ.
Which of the following events are disjoint and What proportion of the females rated their intelligence less than 7.
Given the following data from two independent samples, conduct a one-tailed hypothesis test to determine if the first sample mean is larger than the second sample mean, given a 0.05 level of significance.
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