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Assume that total carbohydrate intake in 12 to 14 year old boys is normally distributed with mean 124g /1000cal and standard deviation 20g/1000cal. Determine percentage of boys in this age range have carbohydrate intake above 140g/1000cal and carbohydrate intake below 90g/1000cal?
Find a 90% confidence interval for the mean amount left by all groups.
2 laptops are chosen at random without replacement, what is the probability that both are high priced?
Using a significance level of 0.05 I want to conduct 3 hypothesis tests using the data below. I need to state my alternative and null hypotheses and test a claim about a proportion.
How would a decrease of $1 in the x1 coefficient of the objective function affect the optimal values of the decision variables?
What information is provided by the numeral value of the Pearson correlation? What is the major distinction between the Pearson and Spear man correlations?
At the .05 significance level, is there a difference in the proportion of viewers watching the three channels?
The analysis needs to be re-run adding the error into the regression sum of squares.
A company has just manufactured 1295 CDs, and 492 are defective. If 10 of the CD's are randomly selected for testing, what is the probability of the entire batch will be accepted
Twelve case of leukemia are reported in people living in a particular census tract over a five year period. Is this number of cases abnormal if only 6.7 cases would be expected based on national cance-incidence rates?
In an online survey of 4001 respondents, 8% were classified as productivity enhancers who are comfortable with technology and use the internet for its practical value. Suppose you select a sample of 400 students at your school, and the population ..
Failure times for a randomly failing component are 3.3, 14.3, 27.1, 41.3, and 92.2 hours. Find the MTTF and standard deviation using: a) moment estimation. b) maximum likelihood estimation.
Can the researcher conclude that humidity has a significant effect on eating behavior? Use a two-tail test with α = .05.
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