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- IQ scores or normally distributed with the mean of 100 and a standard deviation of 15. A simple random sample of 13 statistics professors yields a standard deviation of S = 7.2. Using a 0.05 significance level what is the test statistic for the claim that standard deviation equals 15?Interpret the Z score for a student who scored an 91 on an exam that had a mean of 86 and a standard deviation of 5. One mean above the standard deviation One standard deviation above the mean One standard deviation below the mean One mean below the standard deviationWhat is the mean , median, mode, and standard deviation?
- Population (N) Mean (95% CI) Median Mode Standard Deviation Managers (21) 60.52 (4.23) 60 70 9.28 Employees (29) 52.79 (5.90) 57 68 15.52 What do the mean, median, mode, and standard deviation tell us about the managers and employees?Interval Freq 0 - 9 6 10 - 19 12 20 - 29 16 30 - 39 11 40 - 49 5 Calculate the mean and standard deviation for the table of sample data above.Formula for weighted standard deviation
- Pls help ASAP ASAP.This C The weight of an organ in adult males has a bell-shaped distribution with a mean of 310 grams and a standard deviation of 40 grams. Use the empirical rule to determine the folowing (a) About 99.7% of organs will be between what weights? (b) What percentage of organs weighs between 230 grams and 390 grams? (c) What percentage of organs weighs less than 230 grams or more than 390 grams? (d) What percentage of organs weighs between 270 grams and 430 grams? (a) and grams (Use ascending order.) (b)% (Type an integer or a decimal.) (c) % (Type an integer or a decimal.) (d) % (Type an integer or decimal rounded to two decimal places as needed.) Enter your answer in each of the answer boxes. e Type here to search 近are you able to help me produce a graph which includes all of this Use the data generated in the laboratory to prepare a table and graph of the results, with a written summary. To include: Table of summary results that is mean and SD (standard deviation) only (not individual numbers for each tube) Graph of change in whatever parameter (plot the mean and error bar using the standard deviation) is used to determine the effect on the vegetable on the y-axis against sugar/NaCl concentration on x-axis, put both parameters on one graph. Do a correlation graph so add a correlation, R2 number, find this in Excel – add trendline and under trendline look for more options and at bottom at R2 to graph. Then in discussion use this value to comment on whether or not a correlation between the changes and the findings. Text: short summary of the key findings - NOT what happens for each tube but the general trend of the results and the correlation coefficient. with these set of results Solution…
- what is the z-score formula? (value - standard deviation) divide by mean (value - mean) divide by standard deviation (mean - value) divide by standard deviation (mean - standard deviation) divide by valuellustration 11.12. You are given the position in a factory before and after the settlement of an industrial dispute. Comment on the gains or losses from the point of the workers and that of the manage- ment. Before 2,440 45.5 After 2,359 47.5 No. of workers Mean wages Median wages Standard deviation 49.0 45.0 12.0 10.0Reading Pressure [mmH20] 397 1 2 398 397 7) Pressure values measured by various probes in the test section of a wind tunnel to obtain the freestream velocity have been given in the table below. The researcher who made the measurements concluded that the 8th reading 4 398 397 396 had a value of -3.625 as the "deviation from the mean" and eliminated the data 7 395 point based on the Chauvenet criterion. However, she later realized that she used the factor "1/n" instead of "1/(n-1)" in the calculation of standard deviation, which was used for data sets with a total number of data points less than 20. Find the value of the 8th reading and determine if the elimination is actually necessary. 8. ? 9 398 10 398 11 399 12 398 13 399 14 396 15 399 16 400
