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Biology and Environmental Science
Rice is a staple food for much of the world's population. The height of a rice plant (usually 0.4-5 mm) depends on the rice variety and the environment. Genetic engineering is currently underway to protect rice plants from disease and to decrease the variability in plant height. In a controlled experiment, plant heights were measured (in millimeters); 30 natural rice plants had a sample variance in height of 1.5 mm, and 22 genetically engineered rice plants had a sample variance in height of 0.89 mm. Assume normality.
a. Find a 95% confidence interval for the true variance in height for natural rice plants.
b. Find a 95% confidence interval for the true variance in height for genetically engineered rice plants.
c. Is there any evidence to suggest the population variance is different for natural and genetically engineered rice plants?
a. an examination of the means of variables in the data set suggests that houses with more bedrooms tend to be more
(i) What percent of these bolts will withstand a stress of 90 ksi without breaking? (ii) What range covers the middle 50% of breaking strengths for these bolts?
one environmental group did a study of recycling habits in a california community. it found that 74 of the aluminum
Describe in your own words the difference between a means objective and a fundamental objective. Why do we focus on coming up with attribute scales that measure accomplishment of fundamental objectives, but not means objectives? What good does it ..
Given that the pair of hypotheses that correspond to the claim are H0=500. Find the critical value for the hypothesis test.Assume that the level of significance is 0.02.
What is the correlation between Age Difference and Year?- Interpret the slope of this line.- Predict the average age difference in 2015.
Two distinct even numbers are selected at random from the first ten even numbers greater than zero. What is the probability that the sum is exactly 30?
customer arrives at a checkout counter in a department store have a poisson distribution with average of 4 arrivals
Calculate the mean difference for the following data. The scores are the number of pictures the participants remembered correctly out of 20.
The company sells Mr. Brophy an insurance policy and he has an accident. What's the probability of Mr. Brophy being a good, medium or poor driver?
A random sample of eight cars from each manufacturer is selected, and eight drivers are selected to drive each automobile for a specified distance.
a multiple choice question consist of 8 questions with five choices abcd or e.if all 8 answers are random guesses what
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