Question: Can someone please answer this question that is due 4/24/18 @6pm please thank you Chapter 6, Section 5, Exercise 256 Do Hands Adapt to Water?
Can someone please answer this question that is due 4/24/18 @6pm please thank you
Chapter 6, Section 5, Exercise 256Do Hands Adapt to Water?
Researchers in the UK designed a study to determine if skin wrinkled from submersion in water performed better at handling wet objects.1They gathered20
participants and had each move a set of wet objects and a set of dry objects before and after submerging their hands in water for30
minutes (order of trials was randomized). The response is the time (seconds) it took to move the specific set of objects with wrinkled hands minus the time with unwrinkled hands. The mean difference for moving dry objects was0.85
seconds with a standard deviation of11.5
seconds. The mean difference for moving wet objects was-15.1
seconds with a standard deviation of13.4
seconds.
1Kareklas, K., Nettle, D., and Smulders, T.V., "2013 Waterinduced finger wrinkles improve handling of wet objects."Biol. Lettvol 9 (2013).
(a) Perform the appropriate test to determine if the wrinkled hands were significantly faster than unwrinkled hands at moving dry objects.
State the null and alternative hypotheses.
Use1
ford
in the response area.
(b) Calculate the relevant test statistic.
Round your answer to two decimal places.
t
-statistic=
the absolute tolerance is +/-0.03
(c) Find thep
-value.
Round your answer to three decimal places.
p
-value=
the absolute tolerance is +/-0.1
(d) What is the conclusion?
RejectH0
.
Do not rejectH0
.
(e) Do we have evidence to conclude wrinkled hands are significantly faster at picking up dry objects?
Yes
No
(f) Perform the appropriate test to determine if the wrinkled hands were significantly faster than unwrinkled hands at moving wet objects.
State the null and alternative hypotheses.
Use1
ford
in the response area.
(g) Calculate the relevant test statistic.
Round your answer to two decimal places.
t
-statistic=
the absolute tolerance is +/-0.5
(h) Find thep
-value.
Round your answer to five decimal places.
p
-value=
the absolute tolerance is +/-0.00005
(i) What is the conclusion?
RejectH0
.
Do not rejectH0
.
(j) Do we have evidence to conclude that wrinkled hands are significantly faster at picking up wet objects?
Yes
No
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