A baby dolphin is born into the ocean, which is a fairly cold environment. Water has...
A baby dolphin is born into the ocean, which is a fairly cold environment. Water has a high heat conductivity, so the thermal regulation of a newborn dolphin is quite important. One measure of the effectiveness of blubber is its “conductance.” This value was calculated on 6 new dolphins and 8 adult dolphins (Dunkin et al. 2005). The newborn dolphins had an average conductance of 10.44, with a standard error of the mean equal to 0.69. The adult dolphins’ conductance averaged 8.44, with the standard error of this estimate equal to 1.03. All measures are given in watts per square meter per degree C.
(1) What are the standard deviations?
(2) What is the appropriate null hypothesis for a two sample t-test?
a. There is a difference in means. b. The means of the difference is zero. c. The mean differences is not zero. d. There is no difference in means.
(3) What is the pooled sample variance?
(4) What is the standard error of the difference of means?
(5) What is the test statistic?
(6) What is the Critical value?
(7) What is the P-value and associated conclusion?
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A baby dolphin is born into the ocean, which is a fairly cold
environment. Water has...
For the independent-measures t test, which of the following describes the estimated standard error of M1 - M2 (whose sy...
For the independent-measures t test, which of the following describes the estimated standard error of M1 - M2 (whose symbol is )? O The variance across all the data values when both samples are pooled together O A weighted average of the two sample variances (weighted by the sample sizes) O The difference between the standard deviations of the two samples O An estimate of the standard distance between the difference in sample means (M, - M2) and the difference...
For the independent measures ttast, which of the following describes the estimated standard error of the...
For the independent measures ttast, which of the following describes the estimated standard error of the difference in sample means (whose symbolis )? The difference between the standard deviations of the two samples A weighted average of the two sample variances (weighted by the sample stres) An estimate of the standard distance between the difference in sample means (M. - Me) and the difference in the corresponding population means (Hi-Pa) The variance across all the data values when both samples...
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