Question

Need help for #4 and #6 please show work and explain

90% 10:41 AM PROBLEMS 263 In this dstribation, r sample mean of M-70 comesponds to a bscvee od STEP 4 Make a dechion about He and stale the conclmion The -score we oblained is in the critical region. This indicaes that our sample mean of M-0 is not an estreme orumsual value beeteaned from a population with μ-65. Therefore. our santa decision is to Fail a rejiecr He Our conclusion for the sudy is that the data de bot provide alficient evidence tha the special aining changes les scores DEMONSTRATION 8.2 EFFECTSIZE USING COHEN'Sd We will compute Cohen's d using the research situation and the data foom Demonstraion 1 ample mean was M-70. Ta, ene is a S-point mean diflerence. Using the popultion tandard devuton, σ-15, we chan an cffect star cif According to Coben's evalluation sandards (ce Table R.2, this is a medium treatment cffect PROBLEMS . Idenify the our ss of a hypothesis test as preseniod 2 Define the alplha level and the critical nepion for & Define a Type I eror and a Type Il enor and explain in this chape bypotheis tt the consequences od each obeains a sample of 16 participents and has each penon take the herhal supplements every day lo 90 days. At the end oe the 90 days, each penon takrs a standardined memory test. For the general popula scores from the lrthe alpha leveistaged foom @.0500 @..0ง. a. Whar happens to the boundaries for the critical «,-12. The umple of re catch participants had an average of N-54 a. Asseming a two-ailed est ate the nall tyo ls, What hypen.othe prububilityofaType #emor? h Using the standard 4-alicp peocedure, conduct 5. The value of the -score in a hypothesis test is influ- two-tailed hypohesis led with α ïnaluie encod by a varicty of factors, Assuming that all other variables ane held constant, explain how the value of z is iafiluencel by each of the following the eflect of the supplemw 7. Babcock and Marks (2080) evicwed sarvcy dota from 3003-2005, and oheainod an average of p -14 hours per woek spent studying by full-time sluents 4yc colleges in the United States. To determine whether this average has changod in the past 10 years rescarcher selocted a sampk of n64 of today's collepe students and oteaned an average of M-125๒us Ifthe slandand deviation for the hours per woek, does this sample indicate a significant change in the umber of hours spent study ing?Usea twotailed wut with "x-as Increasing the difference etwees the sample mcan and the original populatioe mcan h Increasung the population standand deviation &Although there is a popular helief that herha remedies sach as Ginkpo biloba and Ginseng may imgrove learning and memory in healthy adults these effects are useally not supposted by well drdeb.hn sơ-48 and Nyberg. 2004 In a typical study, a rescancher

Answer 1