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How do you find the z-score corresponding to a score of X = 100 for the distributions given below? How do you know what direction they are going?
a. mu = 80 and sigma = 10b. mu = 80 and sigma = 5c. mu = 105 and sigma = 10d. mu = 105 and sigma = 5
Above, mu represents Mean and sigma represents Standard Deviation.
In summer 2000, a growing number of warranty claims on Firestone tires sold on Ford SUVs prompted Firestone and Ford to issue a major recall. An analysis of warranty-claims data helped identify which models to recall.
Use RNG in Excel to generate n = 5 observations from the Normal distribution N(20, 5). Test H0: μ = 20 versus H0: μ ≠ 20 at the α = 0.05 level of significance. Repeat this process 100 times and then count the number of times that you reject H0.
Choose one time-series describing Airlines and make a line chart. Describe the trend (if any) and discuss possible causes. Fit both a linear and an exponential trend to the data.
Choose the Hypothesis. Specify the Decision Rule. Calculate the Test Statistic. Make the Decision. Give an interpretation of the Decision
A 'good' correlation is data-context driven. For example, I did a project correlating sales volume per state and customer demographics (pretty 'hard' data) and got a .92 correlation.
Multiple comparison procedures are going to be done using the Bonferroni method with α = 0.10. The value of t** is 2.2426. The smallest minimum significant difference (MSD) for finding a difference between groups is computed as 17.68. The correct ..
The mean number of passengers per cruise is 1,820 and the standard deviation is 120.
The auto parts department of an automotive dealership sends out an average of 8 special orders daily. The number of special orders is assumed to follow a Poisson distribution.
The student with the 92 found a grading error on her exam and her correct grade was 95. There were no other grading errors. After correcting this student's paper, the five number summary for the midterm exam will be
Find the probability that exactly 15 flights arrive on time.
Describe 5 data collection techniques in your own words. Explain why the four demographic questions you included in your survey are important and or are of interest to the study.
A random sample of gasoline taxes (in cents) is shown here for 12 states. Use the data to estimate the true population mean gasoline tax with 90% confidence. Does your interval contain the national average of 44.7 cents?
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