Question

A primatologist wonders whether rhesus monkeys possess curiosity. She reasons that, if they do, they should prefer novel stimulation to repetitive stimulation, but if they fear the unexpected, they should prefer repetitive stimuli to novel ones. As of the time she is pondering this question, little research has been done in this area. An experiment is conducted in which 12 rhesus monkeys are randomly selected from the university colony and taught to press two bars. Pressing bar 1 always produces the same sound, whereas bar 2 produces a novel sound each time it is pressed After learning to press the bars, the monkeys are tested for 15 minutes, during which they have free access to both bars. The number of presses on each bar during the 15 minutes is recorded. The resulting data are as follows Subject Bar 1 Bar 2 20 18 24 14 26 15 29 15 9 25 31 40 25 38 27 31 21 32 38 25 18 32 28 10 12 What is the alternative hypothesis? H1: Rhesus monkeys a preference What is the null hypothesis? O Ho: In rhesus monkeys there is no difference in preference between novel and repetitive stimulation O Ho: Rhesus monkeys have a preference for repetitive stimulation O Ho: Rhesus monkeys have no preference or a preference for repetitive stimulation. O Ho: Rhesus monkeys have no preference or a preference for novel stimulation

Answer 1

Sample 1	Sample 2	Difference = Sample 1 - Sample 2
	20	40	-20
	18	25	-7
	24	38	-14
	14	27	-13
	5	31	-26
	26	21	5
	15	32	-17
	29	38	-9
	15	25	-10
	9	18	-9
	25	32	-7
	31	28	3
Average	19.25	29.583	-10.333
St. Dev.	8.024	6.895	8.752
n	12	12	12

null hypothesis : there is no difference in preferance between novel and repitive stimulation

alternate : rhesus monkeys have a preferance between novel and repitive stimulation

It is concluded that the null hypothesis Ho is rejected.  rhesus monkeys have a preferance between novel and repitive stimulation

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type 1 error can be occur.

that is rejecting the null hypothesis when it is true,

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rhesus monkey