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The interquartile range is used as a measure of variability to overcome what difficulty of the range?
a. the range is influenced too much by extreme values
b. the sum of the range variances is zero
c. the range is difficult to compute
d. the range is negative
1.an instructor wanted to construct a confidence interval for the mean gpa of the students in his class. he used the
How would you find normal approximation to the binomial probability in part a? please show how you would calculate mean and standard deviation in form for normal approximation to the binomial and show the final form you would use w/o going through..
In a 0ne-tail test (l side) with z score of 1.645, what are the percentages for critical value and non-critical value?
A manufacturing process makes items whose weights are normally distributed. It is known that 22.57% of all the items made weigh between 100 grams up to mean and 49.18% weigh from the mean up to 190 grams. Find out the standard deviation.
Assume a sample of 400 American adults were taken. Show the sampling distribution of the proportion of adults who balance their checkbook at least once a month.
Assuming that the distribution of the costs is normal, what is the probability that the average for this sample is between $400 and $425?
The politician's advisors estimated the proportion supporting her fiscal policy to be .60. How large of a sample is required?
The length of time recorded is normally distributed with a mean of 184 seconds and a standard deviation of 55 seconds. What is the probability that and individual will be able to keep eye contact longer than 239 seconds?
Conduct post hoc comparisons with the LSD method. Which groups differ significantly at α = 0.05?
1.which slope is more significant when i am predicting the selling price of homes based on the size of the home?a. 64
At α = 0.01 level of significance, test the hypothesis that these data can be described by a Poisson pdf.
Assume that the process is in control and that the population of all jar fills is normally distributed. (Round the z-values to 2 decimal places and final answer to 4 decimal places. Negative amounts should be indicated by a minus sign.)
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