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Look around your living space or current surroundings and find a quantitative variable for which you can collect at least 20 observations (examples: monetary amounts of the last 25 bills you received or your last 20 scores on tests and homework assignments). List the data with your response.
a. Create a five-number summary.
b. Draw a boxplot.
c. Draw your choice of a histogram, stem-and-leaf plot, or dotplot.
d. Refer to your picture in part (c) and comment on the shape and presence or absence of outliers.
e. Compute the mean and compare it to the median. Explain whether or not the relationship between them is what you would expect based on the information you discussed in part (d).
What is the critical value - what is the test statistic and What are the null and alternative hypotheses?
in the pharmaceutical industry quality engineers are responsible for maintaining the quality of drug products produced
(a) What is the average number of customers in the shop? (b) What is the proportion of potential customers that enter the shop? (c) If the barber could work twice as fast, how much more business would he do?
If an employee is selected for promotion, find the probability that the employee will be under 25 or a female. Express your answer as a fraction in lowest terms.
Assume P1 and P2 move simultaneously. Represent this game in normal form.
the miles-per-gallon obtained by the 2010 model q cars is normally distributed with a mean of 22 miles-per-gallon and a
a bright idea. a company produces lightbulbs whose life follows the n1500 300 distribution i.e. the lifetimes of
Suppose we estimate this model with OLS, and there is a correlation between unobserved student traits (in the error term) with attendance. How does this bias the coefficient of attendance?
a manufactured battery is defective with the probability of 5.in a lot of n200 batteries approximate the probability
Test research hypotheses that there is a difference in level of education between liberals and conservatives, set alpha at .01. Would your decision have been different if alpha were set at .05?
Review this week's Learning Resources and media program related to multiple regression. Using the SPSS software, open the Afrobarometer dataset or the High School Longitudinal Study dataset (whichever you choose) found in the Learning Resources for..
1 the cincinnati enquirer reported that in the united states 66 of adults and 87 of youths ages 12 to 17 use the
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