Questions from Essentials of Statistics

Q: Refer to Exercise 10.86 and find a 99% confidence

Refer to Exercise 10.86 and find a 99% confidence interval for the difference between the mean wing lengths of the two subspecies. Data from Exercise 10.86: D. Cristol et al. published results of the...

Q: In the article “Sleep Apnea in Adults With Traumatic Brain Injury

In the article “Sleep Apnea in Adults With Traumatic Brain Injury: A Preliminary Investigation” (Archives of Physical Medicine and Rehabilitation, Vol. 82, Issue 3, pp. 316– 321), J. Webster et al. in...

Q: L. Grossback et al. examined mandate perceptions and their causes

L. Grossback et al. examined mandate perceptions and their causes in the paper “Comparing Competing Theories on the Causes of Mandate Perceptions” (American Journal of Political Science, Vol. 49, Issu...

Q: A mutual fund is a professionally managed investment that can be sold

A mutual fund is a professionally managed investment that can be sold to the general public. Mutual funds can be specialized into different categories such as healthcare-related or technology-related...

Q: You conducted a non-pooled t-test to decide whether

You conducted a non-pooled t-test to decide whether the mean number of acute postoperative days spent in the hospital is smaller with the dynamic system than with the static system. Use the technology...

Q: In the article “Trophic Interaction Cycles in Tundra Ecosystems and the

In the article “Trophic Interaction Cycles in Tundra Ecosystems and the Impact of Climate Change”, R. Ims and E. Fuglei provided an overview of animal species in the northern tundra. One threat to the...

Q: We conducted a non-pooled t-test, at the

We conducted a non-pooled t-test, at the 5% significance level, to decide whether the mean operative time is less with the dynamic system than with the static system. Use the technology of your choice...

Q: L. Petersen et al. evaluated the effects of integrated treatment

L. Petersen et al. evaluated the effects of integrated treatment for patients with a first episode of psychotic illness in the paper “A Randomised Multicentre Trial of Integrated Versus Standard Treat...

Q: An independent golf equipment testing facility compared the difference in the performance

An independent golf equipment testing facility compared the difference in the performance of golf balls hit off a regular 2-3/4’’ wooden tee to those hit off a 3’’ Stinger Competition golf tee. A Call...

Q: Repeat parts (b)–(e) of Exercise 11.9

Repeat parts (b)–(e) of Exercise 11.9 for samples of size 1. Data from Exercise 11.9: This exercise involves the use of an unrealistically small population to provide a concrete illustration for the...