Most government buildings are now smoke-free, and the trend is to ban smoking in all public places
Indicate whether the statement is true or false
T
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The _____ is made up of seven base units, including those for length, temperature, and weight.?
A. standard system? B. metric system? C. dimensioning system? D. fraction system?
A battery manufacturer claims that the lifetime of a certain type of battery has a population mean of 40 hours and a standard deviation of 5 hours. Let 
represent the mean lifetime of the batteries in a simple random sample of size 100.
a. If the claim is true, what is 
?
b. Based on the answer to part (a), if the claim is true, is a sample mean lifetime of 36.7 hours unusually short?
c. If the sample mean lifetime of the 100 batteries were 36.7 hours, would you find the manufacturer’s claim to be plausible? Explain.
d. If the claim is true, what is 
?
e. Based on the answer to part (d), if the claim is true, is a sample mean lifetime of 39.8 hours unusually short?
f. If the sample mean lifetime of the 100 batteries were 39.8 hours, would you find the manufacturer’s claim to be plausible? Explain.
A 95% confidence interval for a population mean is computed from a sample of size 400. Another 95% confidence interval will be computed from a sample of size 100 drawn from the same population.Choose the best answer to fill in the blank: The interval from the sample of size 400 will be approximately __________as the interval from the sample of size 100.
i. One-eighth as wide ii. One-fourth as wide iii. One-half as wide iv. The same width v. Twice as wide vi. Four times as wide vii. Eight times as wide
Draw an objective tree for the following:
If you drive in the state of Florida, you may notice some traffic congestion when crews trim trees on the state roads and freeways. Assume that the Florida Department of Transportation is the client. Usually, branches 6 inches or less in diameter are trimmed. The allowable horizontal distance from the edge of the road to the branches is 6 ft. The material removed from the trees must be collected and removed from the roadside. To reduce the cost of trimming, a maximum of only two workers can be assigned for each machine. The overall cost, which includes equipment and labor must be reduced by at least 25% from present cost. The state claims that the demand for your machines will follow the price reduction—that is, if you are able to reduce the cost by 40%, the demand will increase by 40%. Allowable working hours depend on the daylight and weather conditions.