Question

2) A company making mattresses wants to test two different designs on elderly people who typically have more trouble sleeping through the night, to see which is more effective at keeping people asleep for more hours. One is a mattress that conforms to the body (mattress #1) the other is a mattress that elevates to different levels to help with sleep apnea and snoring (mattress #2). The company wants to know which mattress makes more of a difference in helping elderly people sleep, mattress 1 or 2. Two groups of elderly people (10 in each) are asked to sleep in each mattress for 2 weeks and how many hours they slept altogether is recorded. Is one mattress significantly more helpful than the other? Mattress 1 Sleep Mattress 2 Hours of Sleep 12 9.5 7 10 6 10 14 13 5 5 2 10 17 19 12 18 15 8 7 a. What is the independent variable? b. What is the dependent variable? c. What test did you use to analyze the data? d. Is the test significant? How do you know? e. Write the statistical notation in APA style

Answer 1

solution from the given data mean (*1 = 14 standard deviation sid, B. 1972 > na 10 yamean? - 6.05 Standard deviation ,sod2 = 2.9293 n2 = 10 null hypothesis Ho: ll, all 2 alternate hypothesis , Hii Ho 742 OOS normal table, Standard From the taly = 1.833 right tailed since test is right-tailed Reject Ho it to 7 1.833 Stat'so'c (t) = (2-4) Visdp 14 (58222 Test 14- 6.05 to a 10.2209 10 85808 + 10 5.798 itol 5798

coitical Value The min (ni-i, n-1) ice, a dif value of Ital with is 18 33 & Ital= 1.833 got Ito 1= 5.798 Make decision we here valice > Ital and Ito / of Hence reject Ho p-value ! digni tait. Ha ; (P251977) -0.00013 here we Hence po value of Poos > 0.00013 reject Ho. variable is the amount @ The independent because this is do the of chores you have Control Over variable you A dependent variable value whose quantity the independent variable represents depends on how is manupulated. null, Ho : 4,242 . M, 742 alternate, Ha test stao'st'c :5.798 critical value :1.833

Decision : Reject Ho : 0.00013 p-value to support the have © we is 2 more mean other out a enough evidence mattress Claim that of helpful fhan O a. Statistical methods involved in Carrying Study include planning designing Collecting data, analysing, drawing meaningful interpretation and Sieposting of the research findings. The stab's b'cal analysis gives meaning meaningless numbers thereby life lifeless data. breathing The independent variable is the because this variable chores you control gau A dependent variable he presents value depends how manipulated for difference of to the into a amount 8 b. do is the oved have quantity the independent on whose is variable oneans T-test we use . we have to NOTE: AS per cheag guidelines solue first four Sub parts remaining parts in give a like if it helps post another please post: please you. Thanle