of 10 observations with the ranges for each of the samples are given in minute in the table below: Sample Мean Range Sampl Mean Range Sample Mean Range e 1 3.86 0.05 3.88 0.03 11 0.05 3.85 3.89 3.98 0.06 7 3.86 0.05 12 0.09 3 3.78 3.94 0.03 8 3.85 0.08 13 3.84 0.08 4 0.07 9. 3.95 0.06 14 3.86 0.10 5 3.84 0.08 10 3.80 0.09 15 3.97 0.07

To determine if their 1.50 inch steel handles are properly adjusted, Smith & Johnson Industries has decided to use an X-Chart which uses the range to estimate the variability in the sample. AnswerHow Step 3 of 7: What is the Lower Control Limit? Round your answer to three decimal places. Period obs1 obs2 obs3 obs4 obs5 1 1.46 1.50 1.46 1.53 1.55 1.54 1.45 1.50 1.54 1.52 1.49 1.53 1.47 1.51 1.47 1.49 1.53 5 1.54 1.50 1.47 1.46 1.54 1.53 1.46 1.51 1.52 1.49 1.46 1.55 1.45 1.47 1.53 1.53 1.50 1.52 1.45 1.49 1.53 1.48 1.53 1.47 1.49 JAWN - 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 S 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 1.460. Copy Value 2 3 4 6789 22 10 1.49 11 1.52 1.52 O Control Chart 12 Table obs6 1.54 1.46 1.52 1.47 1.45 1.50 1.53 1.46 1.45 1.49 1.51 1.52 1.51 1.50 1.47 1.54…

Use Chebyshevs rule and the empirical rule to describe the distribution of this data set. Count the actual number of observations that fall within one, two, and three standard deviations of the mean if the data set and compare these counts with the description of the the data set I developed.

Below are the SPSS results of a related (dependent) samples t-test. Use the SPSS results to answer Questions 5, 6, and 7. Paired Samples Statistics   Mean N Std. Deviation Std. Error Mean Pair 1 Statistics Posttest 57.1250 40 16.73962 2.64677 Statistics Pretest 49.9250 40 15.09014 2.38596   Paired Samples Test     Paired Differences t df Sig. (2-tailed)   Mean Std. Deviation Std. Error Mean     Pair 1 Statistics Posttest - Statistics Pretest 7.200 12.313 (     a     ) (    b    ) (    c    ) .001       Find the mean of the differences ( and standard deviation of the differences (Sd).  Replace “a,” “b,” and “c” in the table above with the correct values. Round to the third decimal place. Do you think there is a statistically significant difference between the pretest and posttest at the .05 level of significance?

Identify the measures of central tendency and dispersion requested for the sample below. f Relative f Cumulative relative f a. Mode 10 0.137 0.137 b. Median 1 14 0.192 0.329 C. Mean 11 0.151 0.479 d. Range 3 9. 0.123 0.603 е. Variance 0.110 0.151 4 8 0.712 Standard deviation 11 0.863 10 0.137 1.000 SUM 73 1.000

7. Calculate -scores for the following raw scores taken from a population with a mean of 100 and standard deviation of 16: 112, 109, 56, 88, 135, 99 Answer: 2 = 0.75, 0.56, -2.75, -0.75, 2.19, -0.06 show work for these please

Here are 11 values from a dataset: 0 0 0 1 2 2 3 4 6 6 6 The sample mean for this dataset is 2.73. Which of the following values is your best guess for the approximate size of the sample standard deviation for these 11 numbers: 1, 2.5, or 5? You may calculate the sample standard deviation for this set of data but it is not required. lp

Exhibit 10-7 In order to estimate the difference between the average hourly wages of employees of two branches of a department store, two independent random samples were selected and the following statistics were calculated. Use the following information and the PopMeanDiff template to answer the following about two samples. Downtown Store North Mall Store Sample size 25 20 Sample mean $9 $8 Sample standard deviation $2 SI Refer to Exhibit 10-7. A point estimate for the difference between the two sample means (Downtown Store- North Mall Store) is 2

Given Samples A and B below Sample A: 2.0 Sample B: 4.3 2.8 4.5 O a. Calculate the mean and standard deviation for each sample. Sample A: XA = Sample B: XB = ; SB = Round to two decimal places if necessary b. Calculate the coefficient of variation for each sample. Sample A: CVA = ; SA = _% 4.2 4.2 4.3 4.0 Sample B: CVB Round to two decimal places if necessary c. Which sample is more variable? o Sample A Sample B Neither sample is more variable than the other 4.4 4.3 3.7 4.9 _% 3.6 2.6 2.8 2.2 2.3 4.1

Group 1. Mean= 24.08                    Group 2. Mean= 26.5            STD Dev= 4.42                                STD Dev= 5.2            Sample Size=16                            Sample Size=16   What is tcomputed =