Unformatted text preview: Midterm 1 - Form A - Fall 2009 Name:
Economics 203 Instructor: Petry distributed. However, adding in the highest paid basketball stars skews the distribution. How WOuld the
distribution of salaries best be described with all basketball players? a. Positively skewed with mean < median
b. Negatively skewed with median < mean
c. Positively skewed with median < mean
d. Negatively skewed with mean < median e. Perfectly bell shaped with mean = median 2. Of the following, which is the last step involved in the hypothesis testing process?
a. Calculate the point estimate b. Identify the null and alternative hypotheses
c. Calculate the test statistic
d. Set the signiﬁcance level for your hypothesis e. Make a conclusion Use the following information to answer the next 3 questions (3-5): For each question, read the situation and choose the correct test/method from the groups listed below. For
example, if you believe a z—test for a single population mean is appropriate for question 3, then answer (a) for question 3 as the z—test for a single population mean is in Group (a). You may use each option /test more
than once, not at all, etc. z—test for single population mean
Group (a) t-test for difference in population means with equal variances
—test for ratio of variances
t-test for single population mean
Group (b) t-test for difference in population means with unequal variances
X2_test for single population variance 5'
Group (c) t—test for difference in population means with dependent samples A
z-test for single population proportion
Group (d) z—test for differencein proportions with zero hypothesized diiference
z—test for difference in population means with independent samples
Group (e) z—test for diﬂerence in proportions with non—zero hypothesized diﬁerence 3. Joe and Josh each got the same Sudoku puzzle book and record the time it takes each of them to do each
of the 100 puzzles in the book. Assuming these puzzles are a random sample of all Sudoku puzzles, they 4. You would like to know whether college-aged men or women are more likely to own cars. You ask a random sample of 100 college students (48 men and 52 women) whether or not they own a car, noting the responses.
Is either gender more likley to own a car than the other? ...
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- Fall '08