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One environmental group did a study of recycling habits in a California community. It found that 72% of the aluminum cans sold in the area were recycled. (Round your answers to four decimal places.)
(a) If 391 cans are sold today, what is the probability that 300 or more will be recycled?
(b) Of the 391 cans sold, what is the probability that between 260 and 300 will be recycled?
The conservative degrees of freedom for the t distribution are and The standard error, conservative degrees of freedom
For this assignment employ the data below which was taken from the previous online class. Find out if the data is qualitative or quantitative, continuous or discrete, and determine the level of measurement.
suppose the sediment density gcm of a randomly chosen specimen is known to have mean value 2.65 and standard deviation
a psychological test used to measure the level of hostility is known to produce scores which are normally distributed
Does there appear to be a linear relationship between the screen size and the price?b. Which variable is the "dependent" variable?
The probability of his passing english is 0.8, but the probability of his passing both is 0.6. What should be his estimate of the probability of his passing math?
The weights of adult male beagles are normally distributed with a mean of 25 pounds and a standard deviation of 3 pounds. A beagle is randomly selected. Find the probability that the beagle's weight is less than 23 pounds.
Estimated population variance of 2 hours; for University Y, M = 4, S² =1.5 ; and for University Z, M=6, S² = 2.5. What should you conclude? Use the .05 level. Use the steps of hypothesis testing.
200 students took a test. The scores were normally distributed. Your score was in the 60th percentile. How many people scored at or below your score?
Suppose a study is constructed to test a claim, at a 0.05 signifigance level that a population proportion is 40%. A simple random sample of 750 subjects has a proportion of 42%.
The management of a regional bus line thought its cost of gas might be correlated with its passenger/mile ratio. Comment on the data and correlation matrix below.
q1. the width of a confidence interval will bea. narrower for 95 confidence than 99 confidenceb. wider for a sample
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