Proctor ents urces ources canvas.pdx.edu/courses/106252/assignments/1102418?module_item_id=4856623 Are there less children diagnosed with Autism Spectrum Disorder (ASD) in states that have larger urban areas over states that are mostly rural? Assume data were collected from a fairly urban state and they found 165 eight-year olds diagnosed with ASD out of 18096 eight-year olds evaluated. Assume data were then collected for a fairly rural state and they found 56 eight-year olds diagnosed with ASD out of 2400 eight-year olds evaluated. Is there enough evidence to show that the proportion of children diagnosed with ASD in the fairly urban state is lower than the proportion in the fairly rural state? a.) Test at the 4% level b.) Compute a 96% confidence interval for the difference in proportions. Use the following steps for the hypothesis test. For the confidence interval you do not need to do all the steps since you did some of them already in hypothesis test. Part a.) HYPOTHESIS TEST…

Quick note for Excel users: Excel analyzes using first variable minus second variable. If need help, watch the video at the bottom. Testing a claim about a population mean: t-Test An overly involved "neighborhood watch" group has been investigating the length of lawns. In years past, lawns had been mowed to a mean length of 2.5 inches. A recent random sample of lawn lengths is given below. Conduct an appropriate test, at a 5% significance level, to determine if the overall mean lawn length is now higher than 2.5 inches. Data (lawn lengths, measured in inches): 2.46 2.64 3.96 4.58 3.34 3.97 3.88 4.22 3.09 3.39 4.53 3.30 2.98 3.10 2.58 3.44 Checksum: 59.34 3.88 Click Download CSV to download csv file of data or copy/paste the data into Excel. After downloading the file, you may want to save it as an Excel Workbook. A. Consider the parameter of interest and choose the correct alternative hypothesis. =2.5 >2.5 Oμ2.5 Ομ 2.5 B. Are the necessary conditions present to carry out this…

4.) A random sample of Print-O-Matic printing company's employee salaries (in dollars) are contained in table #3.1.1. Table # 3.1.11: Salaries of Print-O-Matic Printing Company Employees Employee Salary ($) CEO 272,500 Driver 58,456 CD74 100,702 CD65 57,380 Embellisher 73,877 Folder 65,270 GTO 74,235 Handwork 52,718 Horizon 76,029 ITEK 64,553 Mgmt 108,448 Platens 69,573 Polar 75,526 Pre Press Manager 108,448 Pre Press Manager/ IT 98,837 Pre Press/Graphic Artist 75,311 Designer 90,090 Sales 109,739 Administration 66,346 a.) Find the mean and median. b.) Find the mean and median with the CEO's salary removed. c.) What happened to the mean and median when the CEO's salary was removed? Why? d.) If you were the CEO, who is answering concerns from the union that employees are underpaid, which average of the complete data set would you prefer? Why? e.) If you were a platen worker, who believes that the employees need a raise, which average would you prefer? Why?