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Your average weekly grocery bill at the store you usually shop is $300. You decided to test a new strategy of buying most items over the weekend from Costco in bulk and when you fall short of some items during the week or the once not appropriate for Costco, you buy from a convenience store near you. You took a sample of your expenses for 20 weeks and found that the average is $285 and the standard deviation for the sample is $25. Set up your null and alternative hypothesis for testing whether your cists are different and do the analysis using α=.05.
Decide whether experiment is binomial, Poisson or neither based on info given. Each week man plays game in which he has a 21% chance of winning.
As we can say there is 5.5 percent chance of seeing the current policy having an effect on smog in the results we observed from natural sampling variation.
Findout either the given correlation is significant at given level of significance. Illustrate what does sample size have to do with the significance of r.
If absolute value of test statistic is less than critical value in hypothesis test decision is to?
A survey of the residents of a new subdivision on why they happened to select that area in which to live. You also wish to secure some information about what they like and do not like about life in the subdivision.
Findout the margin of error for this survey if we want a 99 percent confidence in our estimate of the percent of adults over 50 who take vitamin supplements.
This distribution is positively skewed. The standard deviation of the population is not known.
Construct a 95% confidence interval estimate of their mean weight.
Create network for aerospace launch project below and determine its critical path.
The hypothesis that the samples came from identical populations cannot be rejected, the T value is 16.5 greater that the lower limit.
Determine the mean and the standard deviation of the sample.
If measurements are made over span of 9 months, and results are averaged, find out the probability that neighbourhood is considered unsafe?
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