Week 4 Discussion Template Applying Numeric (Summary) Measures Part A: Comparing two groups using a single quantitative variable The descriptive statistics presented below are the summary measures for the number of listings for the male and female realtors in your Mt. Pleasant data set. Listings for Female Realtors Listings for Male Realtors Mean Standard Error Median Mode 4.079365 7.238095 2.051602 Sum Count S 0 Standard Deviation 9.401621 pratica 88.39048 Sample Variance Sample Kurtosis CLASS 12.4364 Skewness 3.234869 Range Minimum Maximum 44 1 0 44 152 21 Mean Standard Error Median Mode Standard Deviation Sample Variance Sample Kurtosis Skowe Skewness new! Range Minimum Maximum 12.31579 3.765846 10 6 Measure used (one is required, a 2nd is optional) Mean 16.41494 269,4503 14.09694 3.54549 Sum Count Use the statistics provided to draw conclusions about these two groups of realtors. Explain/justify all of your conclusions as you respond to each item below. 76 0 76 234 19 Comparing the center of the listings data for the male and female realtors (put your answer in the table below): Conclusion drawn Why is that a good measure to compare the center of these two groups? Easier to understand and no outliers was present Realtor group Male realtors Female realtors Shape of the data Explain your answer Are there outliers? (put your answer in the table below) Realtor group Are there outliers? Male realtors Female realtors Explain your answer

The __________ __ __ ______ of a random sample is the graph of its theoretical normal percentiles paired with corresponding actual percentiles of the random sample. A. scatterplot B. normal q-q plot C. fitted histogram D. unbiased estimator

Can you answer #8?

PART 3   A car mat manufacture been having quality issues with its production.  A series of tests were carried out to measure the resulting pH of the most common carpet produced, Type 1, as a good indicator of quality. For the following questions show all calculations and formula used.   What is the mean, mode and range of the pH after dyeing? Table – Type 1 pH after addition of dye 5.105 to 5.3 5.305 to 5.5 5.5.05 to 5.7 5.705 to 5.9 5.905 to 6.1 6.105 to 6.3 6.305 to 6.5 No. of samples 1 5 7 8 7 4 1     For pH after addition of dye calculate the standard deviation, showing your calculations in full.   Plot the standard deviation graph in Excel showing the distribution.   From your calculations and the data   Give the minimum and maximum limits the pH may be, given that the distribution is normal. Calculate the probability that a randomly selected carpet sample will have a PH of (i) 6.1 and (ii) 5.4.   Further tests were carried on a…

Just the Skewness please

What is the median lap time? Give your answer precise to one decimal place.

The histogram below shows the ages (in years) of Honda Civic automobiles listed for sale on the Seattle Times Web site on November 26, 2003. 20 15 10 2 4 6 8 10 12 14 16 18 Age (years) Which of the following terms apply to this histogram? (Select all that apply.) O negatively skewed(to the left) O uniform O symmetric O bimodal O unimodal O positively skewed(to the right) Which measure of center is most appropriate for this data? O median O mean Which measure of spread is most appropriate for this data? O standard deviation M # of cars