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A presidential candidate's aide estimates that, among all college students, the proportion p who intend to vote in the upcoming election is at most 65%. If 196 out of a random sample of 270 college students expressed an intent to vote, can the aide's estimate be rejected at the 0.1 level of significance?
What is the null hypothesis?
What is the alternative hypothesis?
What is the type of test statistic? (Z, t, F, chi squared)
What is the value of the test statistic? (Round to at least three decimal places)
What is the critical value at the 0.1 level of significance? (Round to at least three decimal places)
Can you reject the aide's estimate that the proportion of college students who intend to vote is at most 65%?
A scientist wants a confidence interval of 90% and a margin of error of +-2 for a mean of a Normal population with σ =10. What size samples should she take?
Perform the trend analysis of Pf with incrementally increasing number of the simulation cycles, and calculate the statistical uncertainty in the estimate expressed as the coefficient of variation.
What is meant by illusionary correlations? Why is it so difficult for individuals to disprove their beliefs in correlations that are actually false?
Determine the likelihood of accepting a lot which is 1% defective?
The superintendent of a printing plant has selected a random sample of 100 rolls of paper from a large shipment. The average length of the sample rolls is 416 feet, with a variance of 2704 feet.
SmartPeople is an organization that only admits people with IQ's in the top 98 percentile. What IQ score would a person need to be a member of SmartPeople?
Suppose a well-known baseball player states that, at this stage of his career, he is a "300 hitter" or better. That is, he claims that he gets a hit in at least 30% of his at-bats. Over the next month of the baseball season, this player has 105 at..
Correlation between the two variables based on scatter plot - Show the scatter plot for the variables.
Would it be sensible to conclude that more than 10% of applicants are now failing the test?
A statistics professor planed her classes so carefully that the lengths of her classes are uniformly distributed between 45 and 55 minutes. Find the probability that a given class period runs greater than 50.25 minutes.
So construct a multiple regression model for predicting the crime rate based upon various explanatory variables unemployment rate, median income, education level.
Utlizing binomial approximation to normal finding the normal model. A grower claims that only 13 percent of the strawberries he grows are unsatisfactory.
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