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You want to estimate the mean fuel efficiency of Kia Soul automobiles with 99% confidence and a margin of error of no more than 1 mile per gallon. Preliminary data suggests that s = 2.9 miles per gallon is a reasonable estimate of the standard deviation for all cars of this make and model. How large a sample do you need?
Just looking for some clarification on this problem. Please walk through each step, thank you.
We want to have a velocity error constant of Kv - 20. We also want to have a phase margin of approximately 45° and a closed-loop bandwidth greater than ω= 4 rad/s. Use two identical cascaded phase-lead networks to compensate the system.
the scores on a standardized test had mean of 2.711 and a standard deviation of 1.335. a teacher had 61 students take
It is false that some ruby earrings are not pieces of jewelry. Therefore, some ruby earrings are pieces of jewelry.
Compute the Mann-Whitney U test statistic.- Make a decision regarding the null hypothesis. Is there a significant difference in the class ranks of men and women?
A company tracks satisfaction scores based on customer feedback from individual stores on a scale of 0 to 100. The following data represents the customer scores from Stores 1 and 2.
1. for a standard normal model find the z-value that is less than the mean and for which 67 of the area under the
How do you calculate a participant score if she was at the 67th percentile? I only have the standard deviation of the population and the mean. s = 27 x = 448.95
Each of the variables in this analysis was measured by having the students complete a questionnaire. Discuss how this might affect the results. How well do you think that these results can be applied to other populations of high school students?
She therefore asks you to calculate a correlation coefficient for sales of the current week against amount of advertising spent in the previous week.
Assuming the scores follow a normal-shaped distribution, use the 68-95-99.7 rule to determine each of the following:
a researcher notes that the correlation in the group she studies is so large that if there were not a correlation among
the damon family owns a large grape vineyard in western new york along lake erie. the grapevines must be sprayed at the
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