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1. Draw frequency distributions that have
(a) positive skewness,
(b) negative skew- ness,
(c) low kurtosis and no skewness, and
(d) high kurtosis and no skewness.
2. What is the coefficient of variation among the following commuting times: 23, 43, 42, 7, 23, 11, 23, 55?
suppose you work for a company that produces cables and wish to state that less than 0.1 0.001 of your cables are
correlation concerns the relationship between the values of variables. regression analysis determines the nature of
What do we use the F Distribution to test? Provide an example from your place of employment or circle of influence of an instance when you could use the F Distribution.
What is the null hypothesis? What is the research hypothesis?
the meat department of a supermarket sells ground beef in approximate 1 lb packages but there is some variability. a
a major chain of food stores wants to determine the proportion of customers who buy on impulse. the company decided to
Identify the sample and population. Also, determine whether the sample is likely to be representative of the population.
you have learned some of the basic terminology of statistics. please propose a study and write a description of the
Sketch a curve, point out the distribution (i.e., normal , student T, Chi square), critical region(s). test statistics, critical values(s) and n p-value?
The least squares simple linear regression line minimizes the sum of the vertical deviations between the line and the data points.
a new method of treatment is hypothesized to reduce the days patients are hospitalized after surgery. for a sample of
Perform all of the calculations to complete this table and compute the chi-square statistic and calculate degrees of freedom for this chi-square test for goodness-of-fit.
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