What is the flow rate per ton of refrigeration for geothermal heat pumps?
A. 3-7 gpm
B. 7-10 gpm
C. 10-15 gpm
D. 15-22 gpm
Answer: A
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Answer the following statement true (T) or false (F)
Animals in the United States are raised in _____
A) all but 10 states B) all but 15 states C) all but 27 states D) all 50 states
In high concentrations, CO is highly toxic to animals, including humans
Indicate whether the statement is true or false
A sample of 75 concrete blocks had a mean mass of38.3 kg with a standard deviation of 0.6 kg.
a. Find a 95% confidence interval for the mean mass of this type of concrete block. b. Find a 99% confidence interval for the mean mass of this type of concrete block. c. An engineer claims that the mean mass is between 38.2 and 38.4 kg. With what level of confidence can this statement be made? d. How many blocks must be sampled so that a 95% confidence interval will specify the mean mass to within ±0.1 kg? e. How many blocks must be sampled so that a 99% confidence interval will specify the mean mass to within ±0.1 kg?