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The International Bottled Water Association says that Americans on the average drink 4.6 (8-oz.) servings of water a day. Assume that the number of 8-oz. servings of water is approximately normally distributed with a standard deviation of 1.5 servings. (Give your answers correct to four decimal places.)
(a) What proportion of Americans drink more than the recommended 8 servings?
(b) What proportion of Americans drink less than half the recommended 8 servings?
q1 if light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500
What is the probability that next week's show will: Have between 30 and 37 million viewers? (Round z-score computation to 2 decimal places and your final answer to 4 decimal places.
A minority representation group accuses a major bank of racial discrimination in its recent hires for financial analysts. Exactly 10% of all applications were from minority members, and exactly 8% of the 900 open positions were filled by members o..
a statistician employed by a consumer testing organization reports that at 95 confidence he has determined that the
the specifications on an electronic component in a target acquisition system are that its life must be between 5000 -
Determine the relationships among data above? Analyze with charts/graphs/tables and a discussion.
Do students tend to improve their SAT Mathematics (SAT-M) score the second time they take the test? A random sample of four students who took the test twice received the following scores
Assuming these data are from two independent groups, calculate dfX, dfY, and dftotal for the data above. Determine the critical values for t based on the df you calculated for the question above, assuming a two-tailed test with a p level of 0.05.
The Atlanta Convention & Visitors Bureau just released a report on the percentage of available hotel rooms in Fulton County that were rented (occupied) in 2003.
There are four entrances to the Government Center Building in downtown Philadelphia.The building maintenance supervisor would like to know if the entrances are equally utilized.
Formulate null and alternative hypotheses about the slope of the true regression line. State a two-sided alternative, and perform a significance test.
On the basis of these results, do you think retailers and consumers have a right to complain to the manufacturers? Why?
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