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You want to know if there's an association between college students' spring breakdestinations and what year they're in. You take a random sample of 405 college students and record the following data:
Amusement Parks Mexico Home Other
Freshman 23 21 43 21
Sophomore 34 23 14 26
Junior 25 30 23 26
Senior 27 33 17 19
A. Set up the null and alternative hypothesis.
B. What are your degrees of freedom?
C. Using your T-Â83, compute the expected values for each cell.
D. Will a chiÂsquare hypothesis test of independence be valid in this situation? Explain.
E. What are your test statistic (X^2) and P-Âvalue?
F. What can you conclude if alpha(a) = .01
Test hypothesis that calories of two populations are equal. Illustrate all steps of the hypothesis testing process. Points will be deducted for missing parts.
Use value you found in part a to find out degree of confidence for interval 65.65
The mean time for these workers is = 39.8 seconds and the -value less than 0.0001. It is appropriate to conclude which of the following?
Change the last number from 257 to 61 and recalculate the confidence interval. Using the results, describe the effect of an outlier or extreme value on the confidence interval.
A manufacturer claims that the mean lifetime, , of its light bulbs is 49 months. The standard deviation of these lifetimes is 9 months. Seventy bulbs are selected at random, and their mean lifetime is found to be 46 months.
q1. consider an investment portfolio of 50000 in stock a and 50000 in stock b. the expected value of a is 9.5 and b is
First part of this theorem allows a problem solver to compute probabilities about sample means regardless of whether a population is normally distributed.
How many different combinations of the clients could be considered for inclusion into his limited schedule for that day?
assume john is conducting a one-way anova with three groups. naturally he specifies the null hypothesis as
a national grocers magazine reports the typical shopper spends six minutes in line waiting to check out. a sample of 16
Standard deviation of 11.6 hours. what is the 99% confidence level for the mean number of hours that the population of high school students spent working each week?
Choose an article that explains research using one or more statistical tests (z, t, ANOVA, chi square, regression) as part of data analysis. Explain the study using the following information:
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