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Twelve auto engine crankshafts measure: 224.120; 224.001; 224.017; 223.982; 223.989; 223. 961; 223.960; 224.089; 223.987; 223.976; 223.902; 223.980. Dimension is thought to be 224 mm and variance is unknown for manufacturing process. Is there evidence that mean dimension is not 221 mm? Suppose population is normally distributed. Use a=0.05 and critical value method.
Draw a sketch of the standard normal distribution curves, one for the current process and another one for the recentered process. Label the spec limits and shade the area of the curve that corresponds to your answer.
An engine system consists of three main components in a series, all having the same reliability.
Complete the table and answer the following questions. Use the .05 significance level.
Comparison of paired and unpaired samples test - Prepare a brief conclusion statement summarizing your results. What can you tell this MHMR about client satisfaction? What could you suggest they do to improve?
Simulate the arrival of cars at the service station for 20 arrivals and compute the average time between stations and Simulate the arrival of the cars at the service station for 1 hour
Plan the scatter diagram
Is it reasonable to conclude that this set of n = 16 people is not a representative sample of registered voters?
Determine the mean and standard deviation for number of actual voters in groups of 1002.
In an exam, the mean score is 70 and the variance is 16. What is the probability that a student's score will lie within the "54 to 86" range?
How many students should be surveyed to estimate the mean score within 25 points with 90% confidence?
An ANOVA procedure is used for data that was obtained from four sample groups each comprised of five observations. The degrees of freedom for the critical value of F are:
By using.02 level of significance, carry out a 5-step hypothesis testing procedure to find out if new processes considerably reduced the wait time.
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