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Find the value of the test statistic z using: The claim is that more than 75% of adults always wear a seat belt in the front seat. A Harris Poll of 1012 adults resulted in 870 who say that they always wear a seat belt in the front seat.
For each variable, identify the kind of graph that should be used to display the distribution of scores (histogram, polygon, or bar graph).
a hockey team has 6 forwards 4 defensemen and 2 goalies. at any time 3 forwards 2 defensemen and 1 goalie can be on the
consider the following minimization problemmin z x1 2x2s.t. x1 x2 3002x1 x2 4002x1 5x2 750x1 x2 0what is the
Calculate using excel analysis tools the significance of the difference between the proportion of men and women who support gun control with 74 men oppose.
Assume the standard deviation of the distribution is 2.5pounds, what is the probability that the mean of a sample of 55 families is between 17 and 18 pounds.
a) How is it possible that the minimum of the 365 values is 0 inches and the median is also 0 inches? b) Describe the distribution as symmetric, left-skewed or right-skewed.
The data collected was for each car for each type of fuel. Performance was measured in miles per gallon. Perform an ANOVA test and state the results.
find the standard score z such that the area above the mean and below z under the normal curve is 0.3975.find the
1.a researcher wishes to compare the effect of the rate of stepping on heart rate in a step-aerobics workout. a
You have 4 groups that you are trying to find if there is a difference in any of the population means. In each group there are 7 observations. The given level of significance is an alpha of .005. Your MSA is 6,200 and your MSW is 1,000. Will you r..
A study has been made to compare the nicotine contents of two brands of cigarettes. Ten cigarettes of Brand A have an average nicotine content of 3.1 milligrams with a standard deviation of .5 milligrams
How many cities have a population of at least 100,000 but less than 1,000,000? What percentage of cities are in this group?
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