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Given the standardized normal distribution (with a mean of 0 and a standard deviation of 1, as in Table E.2), what is the probability that:
A) Z is less than 1.08?
B) Z is greater than -0.21?
C) Z is less than -0.21 or greater than the mean?
D) Z is less than -0.21 or greater than 1.08?
Critically discuss how you can apply the concept and method of interval estimation to help you solve some of the problems in a regularly accounting department. Give a few examples.
In this research report you will be analysing a set of data of which can be found in an EXCEL file available for download in the Assessment section of the Blackboard site.
Construct a 99% confidence interval for the proportion of customers favoring underground installation.
A Starbucks manager decides to study waiting times of customers for service at the lunch time rush hour 1100-1200. He observes three customers to measure the time the customer enters the line to the time he or she reaches the counter.
Describe what do you mean by terms 'false positive" and " false negative".
Describe the optimal solution to a linear programming problem. comprise the following constraints from a two -variable linear program.
Fitting of simple linear regression equation - Given the student population for a school district over the past few years, find the prediction equation for this data.
From her district, consisting of several hundred stores, she selects a random sample of 30 stores. For each store she gathered the following information.
The p-value for a test statistic is .085, what is the minimum level of significance required to reject the null hypothesis?
Verify value of t for the independent Variable, using formula. (That is, using formula in the Formula Sheet compute the t statistic , given data provided in the print out).
The researchers claimed that of those who completed the program, 85% improved. What possible confounds can you identify in this study?
Determine what analysis would you do on each problem (ie, one-sample z-test, one-sample t-test, proportion test, two-sample independent t-test, or paired test)?
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