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A company produces packets of soap powder labeled "Giant Size 32 Ounces." The actual weight of soap powder in such a box has a normal distribution with a mean of 33 oz. and a standard deviation of 0.4 oz. To avoid having dissatisfied customers, the company says a box of soap is considered underweight if it weighs less than 32 oz. To avoid losing money, it labels the top 5% (the heaviest 5%) overweight. How heavy does a box have to be for it to be labeled overweight? Round your answer to the nearest hundredth.
Then comment on the effectiveness of the presentation: Were the frequency distributions used effectively to report the results? Why or why not?
At the 0.10 significance level, can we conclude that the annual rates of return are higher on the big board?
With this information, by constructing a 2 by 2 table, compute the predicative value positive and predictive value negative of the ELA in hypothetical population of 1000000 blood donors.
An aptitude test has a mean of 220 and standard deviation of 10. find the corresponding z score for:
Find the probability taht exactly 6 are satisifed with the airlines. Find the probability that fewer than 4 are satisfied with the airlines. Find the probability that 5 or more are satisfied with the airlines. Find the probability that between 3 a..
Does this sample indicate a smaller average? Use α = 0.05 and assume a normally distributed population.
A cereal manufacturer seeks to test their newest product against competitor's. A group of 100 children was asked to measure each brand, and then to express a preference.
What proportion of the variability in steel shipments for motor vehicles is described by regression equation?
Suppose a doctor uses the average x bar for two tests taken about a week apart. what is the probability of x bar less than 3500? C. Repeat part B for n = 3 tests taken a week apart.
a) Do a test to see if workers attitudes on this matter have changed using a 90% alpha. b) Explain to management what your findings are and what this suggests about future decisions vs work options.
At the 0.05 level of significance, test whether the mean baseline body mass index for the population of middle aged men who develop diabetes is equal to 24.0 kg/m 2 , the mean for the population of men who do not. What is the p-value of the test?
Is this sample sufficient to conclude that the eye-spots have a significant influence on the birds' behavior? Use a two-tailed test with α= .05. Compute the estimated Cohen's d to measure the size of the treatment effect.
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