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Q1) Pilot survey of ages of country residents is taken and originally shows and average age of 33.5 years with standard deviation of= 5.2 years. Researcher now wishes to do a full survey and to create the estimate of average age of population of country residents with 95% confidence and with precision of evaluate of plus and minus 1.5 years. How large sample will be needed?
Q2) In the political survey , where opponents are probable to be relatively close in terms of percent of vote that they will receive, how large random sample of potential voters will be required to evaluate result with 95% confidence and with margin of error of plus and minus 3%?
Explain your answer to someone who is familiar with the t test for a single sample, but not with the t test for independent means.
If the standard deviation of the amount of coffee dispensed is 0.4oz and the amount of coffee dispensed is normally distributed.
Determine the probability of exactly one success given Poisson distribution with mean of 2.0.
How large should n be so that the standard deviation of is no more than 0.01 and sampling distribution
What is the probability that all three students pick exactly the same card?
MATH1550H: Assignment: Question: Experience shows that X, the number of customers entering a post office during any period of time t, is a random variable the probability mass function of which is of the form
Conduct an analysis of variance
What is the probability that a cereal would be high calorie, given that is low fiber? In other words, what is P (high calorie, given low fiber)?
One approach would be to contact every psychology graduate student you know and ask them to fill out a questionnaire about it.
Determine for each variable if it is the explanatory variable, the response variable, or whether it could be both.
At 0.01 level of significance, is there evidence that mean price is higher at Whole Foods Market than at Fairyway supermarket? Interpret the meaning of p-value in (i).
How large should n be so that a 90% confidence interval for µ has a margin of error and What is the P-value for a test of the hypotheses
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