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A random sample of 10 minature Tootsie Rolls were taken from a bag. Each piece were weighed on a very accurate scale. The results in grams were.
3.087, 3.131, 3.241, 3.41, 3.70, 3.353, 3.400, 3.411, 3.437, 3.477
a) construct a 90% confidence interval for the true mean weight.b) what sample size would be necessary to estimate the true weight with an error +/- 0.03 grams with 90% confidence?c) discuss the factors which might cause variation in the weight of Tootsie Rolls during manufacture.
Normal distribution with mean $60,000 and standard deviation $8000. Four electricians are selected at random from this population to be shipped to another region.
The following data resulted from a taste test of two different chocolate bars. The first number is a rating of the taste, which could range from 0 to 5, with a 5 indicating the person liked the taste.
At the 0.05 level of significance, test whether the software package has reduced the average time it takes to complete deliveries.
Formulate and present the rationale for a hypothesis test that Par could use to compare the driving distances of the current and new golf balls.
How would you apply radical expressions in everyday life? Give an example of the expression.
Derive the probability distribution of the completion times - For each of the distribution in (i) above, calculate their relevant statistics. A task is known to have the following time to completion
The top 25 companies ranked by market capitalization operating in the washington DC, area along with the year they were founded and the number of employees are given below.
Ace Machine Works estimates that the probability its lathe tool is properly adjusted is 0.8. When the lathe is properly adjusted, there is a 0.9 probability that the parts produced pass inspection.
The scores of college-bound senior men on the math part of the SAT followed a normal distribution with mean 527 and standard deviation 116.
Assume sps professors have the average life normally distributed of 82 years, with population standard deviation of 5 years. Determine percent of sps professors will not live more than 80 years?
Find the probability of committing a type I error.
Standard error for regression equation - determination and non determination and explain the meaning of each.
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