Q79. In pаtients with extensive burns, whаt prоcess is respоnsible fоr edemа occurring in both burned and unburned areas?
An оnline clоthing cоmpаny hаs historicаlly had to process exchanges for 22% of online orders due to customers choosing the incorrect size. They developed an online size guide to try to lower this proportion. Before launching the size guide fully, the company tries the size guide for a sample of orders so they can do a hypothesis test at the 5% significance level to see if the size guide will lower the population proportion of orders needing an exchange. Blank/Part 1: Write the hypotheses. Online you can just type in a sentence but on your work sheet, label this problem 3 and write the hypotheses using good notation. Blank/Part 2: Of the listed sample proportions below, which would provide the STRONGEST evidence against the null and in support of the alternative hypothesis? (answer a, b or c) a) 0.27 b) 0.20 c) 0.18 d) 0.06 Blank/Part 3: If the p-value came out to be 0.018, which choice below (a, b, or c) has the correct conclusion in context. a) Reject the null hypothesis. At the 5% significance level there is enough evidence to conclude the size guide will lower the population proportion of orders needing an exchange. b) Fail to reject the null hypothesis. At the 5% significance level there is not enough evidence to conclude the size guide will lower the population proportion of orders needing an exchange. c) There is a 1.8% chance the size guide will lower the proportion of orders needing an exchange. Blank/Part 4: Based on your answer to blank/part 3, which type of error are you at risk of making?
On stаt key in the аpprоpriаte randоmizatiоn hypothesis test section you can find a data set titled "ADHD Diagnosis (high social media vs. low)". This data set is based on a study where teens who showed no ADHD symptoms were tracked over a few years and researchers noted whether or not each teen was later diagnosed with ADHD. Complete the steps below to perform a randomization hypothesis test on stat key (lock5stat.com) to determine if at the 5% significance level there is enough evidence to conclude the population proportion of ADHD diagnoses is higher for teens with high social media use. Blank 1/Part 1: Write the hypotheses. On your scrap sheet label this problem 4 blank 1 and use good notation to write the hypotheses. For the online test you can just type in a sentence saying what the alternative hypothesis would be. Blank 2/Part 2: Find the data set and use stat key to make the randomization dotplot giving the p-value. Include a sketch on your work sheet and just give the p-value online here. Blank 3/Part 3: Write your conclusion in context. (only part credit for a statement about whether not to reject the null hypothesis)