(a) Find the confidence limits at a 99% CI for these two independent samples. (b) Can we conclude that using hand gestures to count the dots resulted in quicker counting?
Nonverbal communication (e.g., the use of
hand gestures) is a common form of human
expression. Some researchers believe it may even
help people make quicker decisions. To test this
belief, a team of researchers conducted a study
in which they recorded the time it took 12 college students to count scattered dots on a computer screen. Half (n = 6) the students pointed
to the dots as they counted (Group Gesture); the
other half (n = 6) were told not to point as they
counted (Group No Gesture). The table lists the
time it took students in each group to correctly
count the dots (in seconds).
Speed of Counting (in seconds)
Group Gesture Group No Gesture
22 32
16 27
18 24
14 31
26 29
18 31
(a) Find the confidence limits at a 99% CI for
these two independent samples.
(b) Can we conclude that using hand gestures
to count the dots resulted in quicker counting? Explain and solve by hand step by step process alpha = .05
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