According to the Internal Revenue Service, 75% of all tax returns lead to a refund. A random sample of 100 tax returns is taken.    What is the probability that the sample proportion exceeds 0.8?

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A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

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Q: If SSR = 48 and SSE = 12, determine SST, then compute the coefficient of determination, 2, and…

A: We have given that SSR = 48, SSE = 12

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Q: 489 Section 9.2 9.11 Babies Weights (Example 20) Some sources report that the weights of full-term…

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Q: P 12 1 4 8 31 с 6 B 14

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A: Given: n = 8 Formula Used: The regression model  is: Y = a + bX b = n∑XY-∑X∑Yn∑X2-∑X2 a = ∑Y-b∑Xn

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A: Mean(µ) = 64260Standard deviations (σ) = 3643X ~ N (µ, σ )= N(64260,3643) n = 80

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Q: Suppose that in a random selection of 100 colored​ candies, 21​% of them are blue. The candy company…

A: We have given thatn = 100p̂ = 0.21p = 0.25Significance level (α) = 0.10 The null and alternative…

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Q: A quality control program is being developed for computer hard-drivers. The mean fraction defective…

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Q: Weights of statistics students were obtained by a teacher as part of an experiment conducted for the…

A: outcomes  0000000011223344555555555568899

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Q: For the data and sample regression equation shown below, do the following. a. Decide, at the 10%…

A: Given: n = 4 Y = -1.5 + 1.1X Formula Used: Test-statistic t = b-βSe Confidence interval = b ± t*se

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