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Having trouble calculating this problem :According to a report in U.S. News from April 2013, the average price of gasoline at all U.S. gas stations was $3.00 (µ). The population standard deviation (σ) of gas prices is $1.75. Let X be a random variable denoting gas price at gas stations. We plan to take a random sample of 36 gas stations.
What is the probability that a random sample of 36 gas stations will provide an average gas price (Xbar) that is more than $3.50?
What is a probability notation? What are the advantages and disadvantages of using a probability notation? How does probability notation aid in decision making?
There is no proof the new policy is more effective, but we cannot finish the policy has no effect on smog. Interpretation of P-value for the given context.
In a sample survey, 200 of 800 individuals enrolled in our managed-care organization indicated that they favored a proposal to extend office hours from 5:00 to 8:00 p.m. Construct a 95% confidence interval for the corresponding true proportion.
At the 0.05 level of significance, is there evidence that the mean amount in the bottles is different from 2.0 liters? Compute the ¬p-value and interpret its meaning.
More on public university tuition. Refer to the previous exercise. The tuition at Moneypit U was $8700 in 2000. What is the predicted tuition in 2008
A contractor is considering a sale that promises a profit of $37,000 with a probability of 0.7 or a loss of (due to bad weather and such) of $18,000 with a probability of 0.3. What is the expected profit?
In studying satisfaction patients have with an operation I have 2 random groups each given a different questionaire. I want to compare the responses of each group and see if the differen
the average flight from point a to point b takes 100 minutes with a standard deviation of 10 minutes.a. what is the
An article in Worth discusses the immense success of one of the world's most prestigious cars, the Aston Martin Vanquish.
Explain the difference between the null and alternative hypothesis. Which one can be proven in a statistical sense?
An article reports that smaller firms seem to be hiring more than large ones as the economy picks up its pace. The table below gives numbers of employees hired.
4. Here is an alternative procedural representation of pairs. For this representation, verify that (car (cons x y)) yields x for any objects x and y.
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