Use the following information to answer the questions: Suppose that an accounting firm does a study to determine the time needed to complete one person's tax forms. It randomly surveys 145 people. The sample mean and standard deviation respectively are 20.3 and 7.8 hours. There is a known standard deviation of 7.8 hours. The population distribution is assumed to be normal. Find the 89% confidence interval. Round all answers to the nearest hundredth. (a) = (b) s = (c) σ= (d) n = Enter DNE if this is unknown. Enter DNE if this is unknown. (e) Critical Value ? (f) Find the 89% confidence interval and complete the sentence below. Conclusion: We estimate with needed is between and % confidence that the population mean time hours.

Q: Sadly, i do not understand the solution, can you write it down step by step, tutor? please

A: The answer is in step 2.

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A: To determine the number of solutions of the below equation. n2-13n=-40

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A:

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A:

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A:

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A: To find the solution of the provided function:

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A: As we know that the number of roots is equal to the highest power of the polynomial.

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A: We need to show Ax=B have no solution or infinite solutions.

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A:

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A:

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A:

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A: From the given inequality; x2-3x-4x2-4x+5&lt;0

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A: The standard form of the quadratic equation is: roots of the quadratic equation is given by:

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A: Here A = 21-14 Let λ be the eigen value of A, then A - λI = 0 ⇒2-λ1-14-λ =0 i.e. (2-λ)(4-λ) + 1 =…

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A:

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A:

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A:

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A: We can find the answer as below

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A: Solution: The length of the tangent drawn from an external point to a circle is equal.

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A: The objective is to solve the above question.

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A: Recall the following fact.

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A: Solution : The given equation is    x=√x + 6