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Our test statistic is F =21.2, the p-value (.0003) is very small. There is very strong evidence of an interaction among the two factors in their effects on the mean GSI level. This is not surprising, the profile plots showed that the lines didn"t appear to be too parallel. What does a statistically significant interaction mean? It implies that the effect of temperature upon the mean GSI is different at the the various photoperiod levels. Similarly, the effect of photo-period upon the mean GSI index is different at the two temperature levels. If you detect an interaction, it usually doesn"t make much sense to continue along to test main effects because, by definition, these are not consistent - e.g. the effect of temperature is different at the two photo-periods. What to do if an interaction is present?
Test for single Proportion - Are the data consistent with the model? Answer yes or no, and explain briefly.
The library is to be given 3 books as a gift. The books will be selected from a list of 16 titles. If each book selected must have a different title, how many possible selections are there.
According to the patient's history and physical examination. What are the chances of herniation if the MRI is positive?
The Department of Labor wants to estimate the percentage of females in the U.S. labor force to within ±5%, with 90% confidence. How many employment records should be sampled?
Find the mean and standard deviation for the number of left-handed students in such classes of 25 students.
Identify each variable in the formula for the binomial probability density function. Also, explain what the fraction: n! / (n-x)!x! calculates.
A sample of 25 concession stand purchases at the October 22 matinee of Bride of Chucky showed a mean purchase of $5.29 with a standard deviation of$3.02.
Solve the following questions involving fundamental operations on polynomials. Solve the following problems involving applications of polynomials.
For a one tailed hypothesis test (upper tail), the p-value is computed to be 0.034. If the test is being conducted at a 95% confidence, the null hypothesis.
Can the value 0.64 be rejected if a survey of 495 homes in Omaha yields 332 with one or more lawn mowers? Use = 0.05.
Confidence interval for the average weight of a nickel. How many nickels does he need to weigh to obtain an average accurate to within 10 milligrams?
Vehicles heading west on Front Street may turn right, left, or go straight ahead at Elm Street. The city traffic engineer believes that half of the vehicles will continue straight through the intersection.
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