Winston's assembly unit has decided to use a p-Chart with an a risk of 1% to monitor the proportion of defective metal shafts produced by their production process. The production manager randomly samples 200 metal shafts at 16 successively selected time periods and counts the number of defective metal shafts in the sample. Table Step 3 of 8: What is the Upper Control Limit? Round your answer to three decimal places. Answer How to ent Sample Defects 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 9 8 12 12 11 13 7 12 11 11 8 7 10 13 7 Control Chart 10 The average of the selected cell(s) is9.000. Copy Value x Copy Table Keypad ard Shortcuts step answers Control Chart

Determine whether the study depicts an observational study or an experiment.   A scientist was studying the effects of a new fertilizer on crop yield. She randomly assigned half of the plots on a farm to group one and the remaining plots to group two. On the plots in group​ one, the new fertilizer was used for a year. On the plots in group​ two, the old fertilizer was used. At the end of the year the average crop yield for the plots in group one was compared with the average crop yield for the plots in group two.

Assuming that the data are normally distributed, a. Determine the z-score such that the area to its right is 18%. z=   b. Determine the z-score such that the area to its left is 91%. z=

You are conducting a study to see if the proportion of voters who prefer Candidate A is significantly more than 0.46. Your sample data produce the test statistic z=1.883. Find the p-value accurate to 4 decimal places.

Alabama's assembly unit has decided to use a p-Chart with an alpha risk of 3% to monitor the proportion of defective copper wires produced by their production process. The operations manager randomly samples 300 copper wires at 14 successively selected time periods and counts the number of defective copper wires in the sample. Answer How to enter your answer (opens in r Control Chart Step 2 of 8: What is the z-value associated with the level of significance stated in the problem? Round your answer to two decimal places. MASIN3A 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. Sample Defects 1 2 4 Table 6 8 7 7 8 8 10 9 9 7 8 9 13 12 11 12 13 9 12 9 14 13 14 Copy Table Copy Table Average Values The average of the selected cell(s) is9.000. Copy Value x

Answer the following questions using the separate rates X1,..., X20 and Y1,..., Y20 shown in Figure 1. (a) Carry out the calculations for a test of the hypotheses that the mean U.S. mortality rate On remained the same or increased from 2005 to 2015 against the alternative that the mean mortality rate decreased. State the hypotheses, test statistic, rejection region, and p-value. Do not interpret the conclusion of the test. (b) Compute a 99% confidence interval for the change in mean heart rate mortality. Do not interpret the interval.

Las Vegas has seen increased competition from Singapore and Macau for customers in the casino resort industry. One measurement of success is the average length of stay by visitors. The data in this file show the number of days a random sample of visitors stayed at each location. a. Using α = 0.05 to determine if there is a difference in the average length of stay by visitors for the three locations. Follow the steps as outlined in the exercises. b. If warranted, perform a multiple comparison test to determine which pairs are different using α = 0.05. c. Verify your results using Excel.

Q1]. [30%] The data for this question given in the table below come from the sample data folder of MINITAB. The data give you the monthly number of people employed (in units of 1000) in the retail trade industry in the state of Wisconsin from January 1970 to December 1974. Copy this timeseries data into an excel spreadsheet in your home area first before you start your analysis. You can use Excel to answer this question. Month 1970 1971 1972 1973 1974 1 322 322 330 348 361 2 317 318 326 345 354 3 319 320 329 349 357 4 323 326 337 355 367 5 327 332 345 362 376 6 328 334 350 367 381 7 325 335 351 366 381 8 326 336 354 370 383 9 330 335 355 371 384 10 334 338 357 375 387 11 337 342 362 380 392 12 341 348 368 385 396 (a) (b) (c) (d) Draw a time series plot of the data and comment on any noticeable patterns. Describe an appropriate time series model for this data, giving your reasons, and obtain estimates of the components of your model using the decomposition method. Using your model…

You are conducting a study to see if the proportion of voters who prefer Candidate A is significantly different from 0.74. Your sample data produce the test statistic z=2.133. Find the p-value accurate to 4 decimal places.