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For each of the following, indicate whether or not you would expect it to have a strong seasonal component and why.
a. Sales of colorful wrapping paper, recorded monthly
b. The number of air travelers to Hawaii from Chicago, recorded monthly
c. The S&P 500 stock market index, recorded daily. Assume that the stock market is efficient, so that any foreseeable trends have already been eliminated through the action of large investors attempting to profit from them.
The one-sample t statistic has the value t = -1.68. What do we know about the P -value of this test?
What is the probability the number of fatal crashes will be between 1000 and 2000 for a year?
A coin is tossed 20 times. A person, who claims to have ESP is asked to predict the outcome of each flip in advance. She predicts correctly on 14 tosses.
Using the 0.99 confidence coefficient, what are the confidence limits for the proportion that plan to vote for the Democratic incumbent.
A 95% confidence interval for the proportion of all adults who bought a lottery ticket in the past year is (assume Gallup used an SRS)
Determine the probability of choosing the area code at random which ends in the odd number if first digit cannot be 1 or 0?
Calculate the mean and standard deviation for this set of data. Convert your answer back to dollars and cents and give the correlation value between number of beers consumed and BAC?
It is known that 60 percent of all registered voters in the 42nd congressional District are Republicans. There registered voters are selected at random from the district. Compute the probability that exactly 2 of the 3 selected are Republicans, u..
Then describe trade-offs which will happen when you lower sample to $10,000 to meet their budget.
Create a 90% confidence interval for mean score on this placement exam for all students.
Estimating a linear regression equation to predict the future values of the dependent variable Y.
How large sample should be selected in order to obtain p estimate with a bound of 0.08 on the error of estimation.
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