The reasons that the sample is representative:
The builders were chosen at random
The population included only builders who build in Vicki's town
Vickie wanted to determine the cost of building a house in her home, so the fact that the builders were from her town makes the sample more representative. Moreover, the random choosing of the builders helps to remove any biases that may be present.
Answer:
The interpretation is that we are 90% sure that the true average salary of the district is in this interval.
Step-by-step explanation:
x% confidence interval:
A confidence interval is built from a sample, has bounds a and b, and has a confidence level of x%. It means that we are x% confident that the population mean is between a and b.
In this question:
The 90% confidence interval for the average salary of the district is [41500,49750].
This means that we are 90% sure that the true average salary of the district is in this interval.
10 dimes
The $2 are exchanged for 10 dimes and 4 quarters, which make 14 coins total.
Answer:
Step-by-step explanation:
can be broken down into three fractions, coefficients, powers of p, powers of q.
Simplify the first fraction, then simplify the others by subtracting numerator exponents minus denominator exponents.
Answer:
9yx
Step-by-step explanation:
product means multiply.
nine, y and x
9yx
