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A surveyor wants to estimate the percentage of maple trees among all trees in a large national forest. It would be impossible to find the actual percentage (too time consuming). Instead the surveyor selects several areas at random and determines the percentage of maple tress in the selected sample to be about 30%. The number of trees in the sample was 400. The surveyor can be about 95% confident that the percentage of maple trees in the national forest is between____ % and ______%.
Is there a difference in preference? State appropriate hypotheses and carry out a matched pairs t test for these data.
In choosing a name for a compact disk player, NAMELAB is considering four names and uses analysis of variance for determining whether all four names.
The population standard deviation is unknown. If you assume that the population mean is 19, find the P-value corresponding to the hypothesis that the average cutthroat trout length is different from 19 (i.e. two-tail test).
Pitney Bowes surveyed 302 directors and vice presidents of marketing at large and midsized U.S. companies to determine what they believe is the best vehicle.
what is the probability that the company makes a profit - calculate the probability that the average weight per sack in a batch, is less than 20 kg.
At the 10% level of significance, does the following sample evidence indicate that the two population means are equal? Assume the populations are normally distributed.
How much of the variation in the dependent variable would be explained by the independent variable in this situation? Use job satisfaction and employee turnover as the variables for this problem.
Kannon Camera has developed a new camera that it claims can take an average of more than 10 photographs per second. You decide to evaluate the company's claim. In summary, in this problem you are given:
dilbert is in charge of evaluating a new machine that manufactures shoelaces. in particular he needs to estimate the
Find SST, SSA, and SSE.- Find MSA and MSE.- Compute the value of the test statistic.- If a = 0.05, would you reject the null hypothesis?
The following output is associated with a multiple regression model with three independent variables: What is the regression model associated with these data?
What is the difference between common causes of variation and special causes of variation?
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