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A company's net sales is $ million from 1993-2002, determine the least squares equation and based on this info, what are the estimated sales for 2005?
93 - 9,239
94 - 12,477
95 - 15,470
96 - 19,535
97 - 24,156
98 - 30,219
99 - 38,434
00 - 45,738
01 - 53,553
02 - 58,247
Your company builds roads, bridges, schools and other multi-million dollar public construction projects. Competitive bids are made for the contracts to undertake these projects. For each project there are three costs:
It is suspected that the mean turnover has changed and is not 6.0. Use the .05 significance level.
Flu cases this past season in the Oshkosh school system were about 15 per week. For the entire state, the weekly average is 16 and the standard deviation, 2.35.
Determine the point estimate and 95% confidence interval for the mean family dental expenses of all employees of the company.
Test the hypothesis that the annual incomes of Teachers in areas of more than 500,000 are significantly more than those in areas of less than 100,000. Use the 5% level of risk.
Define the decision rule. Calculate the value of the test statistic.
what sample size should be used in the funding decision study? Use σ = $4000 as a planning value. ________________
Use the above information to calculate the number of watches (units) and the sales dollars we need in order for our flea market business to break even for the day.
A recent study claimed that 15% of all eighth- grade students are overweight. In a sample of 80 students, 9 were found to be overweight. At a= 0.01, is there enough evidence to reject the claim using critical values?
A health researcher is interested in determining whether or not the speed at which people walk is related to their cholesterol levels. He picks 100 adult volunteers at random, checks their cholesterol levels, and then times each one while they wal..
A large population of overdue bills has balances that follow a normal curve. When we take a sample of 100 of these the average is $500 and the SD is $100.
By using standard normal table, determine critical value (or values) for= 0.14 right-tailed test.
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