Recent Homework Questions About Statistics
8600/(100*5) = ?
Monday, December 2, 2013 at 7:41am
Monday, December 2, 2013 at 5:32am
Yes. 5% of 300 = 15
Sunday, December 1, 2013 at 10:21pm
1. The Chi-square distribution, used in the Chi-square test of independence, varies in shape by degrees of freedom. What does the Chi-square distribution look like for 4 degrees of freedom. A) Unimodal and symmetric. B) Bimodal and symmetric. C) Unimodal and skewed to the left...
Sunday, December 1, 2013 at 8:14pm
We have a population of all adult women. We take a random sample from this population and create a confidence interval. If we take many, many, many different samples from this population we will obtain many, many, many different sample means and confidence intervals created ...
Sunday, December 1, 2013 at 8:09pm
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 13/52 * 12/51 * 11/50 * 10/49 * (13*3)/48 = ?
Sunday, December 1, 2013 at 4:26pm
Please only post your questions once. Repeating posts will not get a quicker response. In addition, it wastes our time looking over reposts that have already been answered in another post. Thank you. A
Sunday, December 1, 2013 at 2:05pm
(10+3 +4+ 25 + 1+4+ 4 + 12+ 6 +8 +10)/11 87/11 = 7.9 Answer B
Sunday, December 1, 2013 at 2:03pm
This is probably true, although it's just a guess on my part. "Reliable statistics on the prevalence of shaken baby syndrome do not exist. Estimates in the United States approach 50,000 cases each year." http://www.healthline.com/galecontent/shaken-baby-...
Sunday, December 1, 2013 at 1:02pm
Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score.
Sunday, December 1, 2013 at 11:34am
Math.stat help :(
Ho: mean1 = mean2 Ha: mean1 ≠ mean2 Since these are just samples rather than the whole population, µ is an inappropriate designation. µ is parameter rather than a statistic. Z = (mean1 - mean2)/standard error (SE) of difference between means SEdiff = √(...
Saturday, November 30, 2013 at 1:42pm
It is the Z test (google it). Where is your confusion centered?
Saturday, November 30, 2013 at 12:27pm
Using the telephone numbers listed in your local directory as your population, randomly obtain 20 samples of size 3. From each telephone number identified as a source, take the fourth, fifth, and sixth digits. a. Calculate the mean of the 20 samples b. Draw a histogram showing...
Sunday, June 30, 2013 at 7:58pm