Estimate the popuation regrestsion model. In(TestScore) - Bo+ B,In(STR,) + BzIncome,+ Bylunch, + u, where ini denates the natunal kog ol x Note that Pe Rfunction logt) computes the nalural log ie, logla) computes the natural log of Choone the corect statement On We shoud not havn induded income nd Lưnch becnuso the hypothesin that 8,-0 and B,-0 and carnot be njected at the 5% sigificanon level O The madei here s woran than the modeh in Question t and Quention 4 because the model hete has the smralest 7 among the three modets Ot The mntimated elashcty of TestScoreo STR K appronimalely 00167 and ts significant at the 5% levet Od The estmaton resuts sugest that a 1% incroaso in STR wosd reduce TestScore by 1.67 points on the test O. The estmaton resuts sugpest thal decreasing STR ty one student woud induce a 1.67 percent increase in TestScore.

Q: What is the coefficient of x²wa³b in the expansion of (x+y+w+a+b)??

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A: factors of 24 that add up to 10

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A: Note: Since you have asked multiple questions, we will solve the first question for you. If you want…

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Q: 7. How many terms are there in the multinomial expansion of (x₁ + x₂ + ... .+x)"? ******..

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A: Sequence

Q: Find A.

A: Given

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A: