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1. The IQ scores of 30 children from under-privileged households, were measured before and a year after, a program of nutritional supplementation was instigated at a primary school. Use a two-tailed test. Is there an effect of nutritional supplementation? Submit your answers on a standard answer sheet.
Given a (alpha) =0.05, what is the critical value of t? (use a two tailed test)
Would an obtained value of t of 2.30 lie within the rejection region?
Does nutritional supplementation affect IQ scores (given that the obtained t =2.30)?
This result would be reported as: t ( ___ ) = _______, p _____ 0.05, r^2=
looking for some steps for e,f,g,h?
Use the normal distribution to approximate the following probability: According to the most recent Davenport student profile, 47% of students have children under 17 living at home with them.
Write a statistical laboratory report using the guidelines in the assigned article, "How to Write a Statistical Report."
Are the events "Republican" and "30-44" independent? Justify your answer. Are the events "Democrat" and "65+" independent? Justify your answer.
Bougainvilleas, mean growth rate was 2.23 inches/week and sample standard deviation was 0.77 inches/week. Determine a 90% confidence interval for mean growth rate of all Bougainvilleas.
A sample of 10 observations is selected from a normal population for which the population standard deviation is known to be 4. The sample mean is 23. (Round your answers to 3 decimal places.) (a) The standard error of the mean is_____?
Which of the variables below do you think will be roughly normally distributed? Please select all that apply.
Calculate the mean and the standard error of the sampling distribution of the sample means. Also, find the mean and standard error of the sampling distribution for samples of size 5.
During the war with Iraq in 1991 the Terraco Motor Company produced a lightweight, all terrain vehicle code named "J99 Terra" for the military. The company is now planning to sell the Terra to the public.
At the .01 significance level, is there a difference in the use of the four entrances?
A meat processing plant has processed an average of 100 tons per day for the last several years. Newer processing machines have been installed recently.
Create a scatter plot for those data. Based on scatter plot, how would you explain relationship between the two variable.
Describe the circumstances under which you should use ANOVA instead of t tests, and explain why t tests are inappropriate in these circumstances. Find a peer-reviewed article that reflects these circumstances, describe the research conducted (i.e...
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