Mathematics, 03.08.2021 22:40 ghwolf4p0m7x0
Suppose we are interested in analyzing average cost of a wedding. We know that on average, weddings cost $30,350 with a population standard deviation of $6650. Suppose we take a sample of 25weddings and we find that the average wedding cost is $33,900. We are interested in seeing if the average wedding cost is increasing.
a. What is the standard error?
b. What is the margin of error at 90% confidence?
c. Using my sample of 25, what would be the 90% confidence interval for the population mean?
d. If I wanted to control my margin of error and set it to 2,000 at 90% confidence, what sample size would I need to take instead of the 25?
e. What are the null and alternative hypotheses?
f. What is the critical value at 90% confidence?
g. Calculate the test statistic (using the sample of 25 and NOT the answer from part d).
h. Find the p-value.
i. What conclusion would be made here at the 90% confidence level?
Answers: 1
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What is the value of x in the equation 6(x + 1) โ 5x = 8 + 2(x โ 1)?
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Multiplying an even number of negative numbers gives an answer that is choose from:
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Consider the polynomials given below. p(x) = x4 + 3x3 + 2x2 โ x + 2 q(x) = (x3 + 2x2 + 3)(x2 โ 2) determine the operation that results in the simplified expression below. 35 + x4 โ 573 - 3x2 + x - 8 a. p+q b. pq c.q-p d. p-q
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Mathematics, 21.06.2019 22:10
Given: ae โ
ce ; de โ
be prove: abcd is a parallelogram. we have that ab || dc. by a similar argument used to prove that โณaeb โ
โณced, we can show that โณ โ
โณceb by. so, โ cad โ
โ by cpctc. therefore, ad || bc by the converse of the theorem. since both pair of opposite sides are parallel, quadrilateral abcd is a parallelogram.
Answers: 1
Suppose we are interested in analyzing average cost of a wedding. We know that on average, weddings...
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