Answer:
The statement is false
Step-by-step explanation:
The lines mean the absolute value of whatever is inside of them. Therefore you can never get a negative number equal to it.
Answer:
The data is a simple random sample from the population of interest.
Step-by-step explanation:
Conditions necessary to consider when constructing a confidence interval include using a large sample size, which should be greater Than or equal to 30 for n and a sample proportion of np ≤ 10. Importantly the sample must be a random sample drawn from the population, meaning that all the population of interest must have equal chances of being a part of the sample data. However, the scenariomabiveb, violates this condition as the sampling design is not completely randomized. Those who do not ply the route on that certain day have no Chaves of being part of the sample.
9514 1404 393
Answer:
- 14/9
- -3.6
- 5/4
- 11/2, 7/8, 5/18
Step-by-step explanation:
1. n = (11/6 -2/3)(4/3) = (7/6)(4/3) = 14/9
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2. x = (9.82 -28.18)/5.1 = -3.6
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3. y = 3/2 -1/4 = 5/4
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4a. t = 2(3 -1/4) = 11/2
4b. y = (1/5 +1/2)(5/4) = ((2+5)/10)(5/4) = 7/8
4c. x = (11/3 -2)/6 = (5/3)(1/6) = 5/18
Answer:
12,000psi
Step-by-step explanation:
Given the 7 days strength of a concrete to be 3000psi, to calculate the estimated mean28-day strength of this concrete the following equality equation is applied
7 days strength = 3000psi
28days strength = y
To get y, we will Cross multiply
7 × y = 28×3000
7y = 28×3000
7y = 84000
Divide both sides by 7
7y/7 = 84000/7
y = 12000
hence the estimated mean 28-day strength of this concrete is 12,000psi