The graph of the waiting time (in seconds) at a red light is shown below on the left with its mean and standard deviation. Assume that a sample size of 100 is drawn from the population. Decide which of the graphs labeled (a)-(c) would most closely resemble the sampling distribution of the sample means. Explain your reasoning. AP(X) 0.04- 8.04P() G 11.7 =11.7 1.17 iu = 9 = 18,9 d: = 11.7 A- 18.9 H: 18.9 50 Time (in sec.) -20 50 Time (in sec.) 50 Time (in sec.) Time (in sec.) Graph most closely resembles the sampling distribution of the sample means, because p; =. 0; =. and the graph (Type an integer or a decimal.) approximates a normal curve Aouanbo jo

To determine if their 13 oz filling machine is properly adjusted, Smith Paints has decided to use an X-Chart which uses the range to estimate the variability in the sample. J. Step 1 of 7: What is the Center Line of the control chart? Round your answer to three decimal places. Period 1 2 day Select the Copy Table button to copy all values. To select an entire row or column, either click on the row or column header or use the Shift and arrow keys. To find the average of the selected cells, select the Average Values button. Copy Table Average Values The average of the selected cell(s) is 12.970. Copy Value 3 4 5 6 7 Table Control Chart 8 9 10 11 obs5 obs6 Sample Mean Sample Range 13.02 13.0050 12.97 12.98 13.04 13.04 13.01 13.01 13.03 12.95 12.96 13.05 12.98 12.9967 obs1 obs2 obs3 obs4 13.01 13.01 12.98 13.05 13.02 12.98 12.99 12.97 12.9983 12.98 13.01 13.02 12.96 13.03 13.04 13.0067 13.04 13.04 13.02 13.03 13.02 13.04 13.0317 12.99 12.96 13.03 12.95 12.97 13.05 12.9917 12.98 12.96 12.99…

A population has a mean μ = 72 and a standard deviation a=27. Find the mean and standard deviation of a sampling distribution of sample means with sample size H n=81. IIE R (Simplify your answer.) (Simplify your answer.) a: =

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