Question

Need 18.12 answered please! :)

18.11 To compare monkey's responses to a pure tone and monkey call, 37 monkeys were randomly selected. The table below contains the responses from the 37 monkeys. The mean differences of the monkey calls and pure tones from this 38 monkeys is * =70.378, the standard deviation is s=88.447. Researchers suspected that the response to monkey calls would be stronger than the response to a pure tone. Do the data support this idea? Do a four-steps test. Call Call 42 Tone 500 59 Call Tone 182 97 Call 203 241 138 485 318 338 Tone 145 141 129 113 112 102 100 74 194 123 194 Tone 474 256 241 226 185 174 176 168 161 150 145 182 201 279 62 84 141 46 41 118 159 341 85 303 208 42 62 112 68 65 18.12 (continue to 18.11) How much more strongly do monkey brains respond to monkey calls than to pure tone (electrical spikes per second)? Giver a 99% confidence interval to answer this question.

Answer 1

Solution : The mean differences of the monkey calls and pure tones from this 38 monkeys is x = 70.378 & Standard deviation s = 88.447 6 X= 70.378 sa88.467. A 38 To find 99%. confidence interveel a = 0.01 Zah = o.oog = 2.576. The gg% confidence interval for is 1 = ( 70.378 - 88.447 Zomy 70378 + $8.8472 538 = 70.378 - 227.8395 √38 70.378 + 227.9395 - Jag Et ge 378-36.96370.378136.963 1 = ( $33.4151, 107.341 ) c scanned with CamScanner

he ggf. Confidence interval is ( 33.4151, 107.341 The more strongly do monkeys brains respond to monkey cause than to pure tone is lies between f 33.44st, 107-341 ) e. ( 33, 107 ) 1C Scanned with CamScanner