O candidato X a governador de certo estado afirma que detém mais de 45% das intenções de voto do eleitorado na próxima eleição. Para verificar a veracidade da informação, o candidato Y mandou realizar um levantamento estatístico utilizando, para tanto, uma amostra aleatória de 625 eleitores. O resultado do levantamento foi o seguinte:

Com as informações dadas, podemos concluir que:

Item 2 - Com a mesma confiança de 90%, o intervalo estimado para a verdadeira proporção de intenções de voto para o candidato X é (38%; 44%), arredondando para números inteiros as percentagens encontradas.

Assinale o item abaixo se é certo ou errado:

Item 0 - Segundo a concepção ricardiana da dívida pública, uma redução nos impostos não altera o consumo, mesmo que o governo reduza seus gastos, sinalizando que assim não irá aumentar os impostos no futuro.

Dizemos que uma função f:R!$ \rightarrow !$R satisfaz a propriedade C nos pontos a, b e c quando

!$ f( {\large{a+b+c \over 3}}) \le {\large{f(a)+f(b)+f(c) \over 3}} !$

Classifique como certo ou errado o item abaixo:

Item 3 - Se f(x) = x³ então f satisfaz à propriedade C se a, b e c são números reais negativos.

Sobre as distribuições de probabilidade podemos afirmar que:

Item 1 - As características da distribuição de Poisson são:
(i) n repetições de um experimento de Bernoulli;
(ii) as repetições são independentes;

(iii) cada experimento tem dois resultados possíveis que são mutuamente exclusivos;
(iv) a distribuição de probabilidade é definida como !$ P(X=x)= \dbinom{n}{x}.p^x.q^{n-x} !$, !$ x=1,2,...,n !$, onde n = número de repetições do experimento, p= probabilidade de ocorrência de sucessos e !$ q=1-p !$.

Com relação à Teoria da Produção, é correto afirmar que:

Item 3 - O caminho de expansão apresenta as combinações dos insumos que minimizam os custos para cada nível de produção da firma.

O candidato X a governador de certo estado afirma que detém mais de 45% das intenções de voto do eleitorado na próxima eleição. Para verificar a veracidade da informação, o candidato Y mandou realizar um levantamento estatístico utilizando, para tanto, uma amostra aleatória de 625 eleitores. O resultado do levantamento foi o seguinte:

Com as informações dadas, podemos concluir que:

Item 3 - A afirmação de que o candidato Y detém mais de 42% das intenções de voto é verdadeira, com base num teste de hipóteses com nível de significância de 1%.

Nos anos que antecederam a implementação do Plano Real (1992 a 1993) houve um expressivo crescimento do passivo externo bruto da economia brasileira. Tal processo:

Item 1 - resultou, em grande medida, das elevadas margens de arbitragem propiciadas pelas taxas internas de juros;

Certo ou errado:

Item 0 - Em relação a modelos matemáticos: parâmetros são constantes genéricas e variáveis exógenas não são determinadas pelo modelo

“Reconsideration of Import Substitution”, by Henry J. Breton, Journal of Economic Literature June 1998, pp. 903-936.

The following text contains two sections of the article above by Henry J. Breton. Your job is to agree or disagree with these statements. Read the definition and mark it right or wrong.

Section 3.2. Key Role of Capital Formation

These ideas put primary emphasis on capital formation as the source of growth. The most obvious difference between firms in rich countries and those in poor ones was the extent to which physical capital was available to work with the labor. There are virtually no data on capital/labor ratios for the early 195 Q's, but there is little doubt that this ratio was vastly higher in the North than in the South in virtually all sectors, except for foreign firms engaged in mining of one kind or another. Thus another policy objective eras to accelerate the rate of investment. This view was supported by a now-famous Arthur Lewis statement: "The central problem in the theory of economic growth is to understand the process by which a community is converted from being a 5 percent saver to a 12 percent saver"(Lewis 1955, pp. 325-26). Tae nearest thing available to a formal theory of growth was that of Roy F. Harrod (1939. 1949), in which the only specified source of growth was capital formation. Harrod specified a simple relationship between increased output and increased capital--the incremental capital/output ratio (ICOR). This ratio was assumed to be constant due to technological factors. There were numerous estimates of the ICOR, and most plans made specific assumptions about its value for sectors and for the economy as a whole. Such estimates were widely used to determine the amount of new capital required to achieve a given growth target. Most observers considered domestic saving the primary constraint, and the earliest arguments for foreign aid rested on the assumption that the savings of the poor countries had to be supplemented by foreign savings if acceptable growth rates were to be achieved.

The allocation of capital within the boundaries laid down with respect to structural change was an important issue. In some instances, the ICOR estimates were used as a criterion; that is; invest where the ICORs are smallest. There were efforts to identify specific objectives to be served by the new investment: for example to raise the saving rate, increase exports, maximize na employment effect, meet certain regional objectives, etc. Evidently this way of thinking revealed further doubts about an effective market answer.

The capital goods sector :vas small or nonexistent in the newly independent countries, and most capital goods had to be imported. An obvious way to encourage investment was to maintain an exchange rate that kept capital's domestic price low. This could be most easily done by maintaining an overvalued exchange rate (or, less frequently, multiple exchange rates). Overvalued exchange rates (relative to a free trade situation) appeared as a means to encourage investment. This produced balance of payment pressures, and to counter these

varieties of tariffs. import licenses, and exchange controls were put in place. Protection in many forms was afforded currently imported consumer durables (and now and then simple capital goods) behind which domestic production took place. Consumer goods (especially durables), rather than capital goods, were protected on the grounds that their costs of production in the developing country would be relatively less than those of capital goods, because production of the latter goods was assumed to be more capital intensive and to employ more complex technology. Where Mahalanobis' view strongly prevailed--India. Brazil, and possibly other large countries--domestic production of capital goods .:as encouraged by keeping out imports and by direct subsidies. Even in such countries. however, attention was given mainly to protecting the domestic market from importation of consumer durables.

Ideas and theories of some well-known economists reinforced the import substitution policies.

Item 1 - R.F. Harrod pointed out that the only source of growth was capital formation.

A intensificação do processo de globalização dos mercados financeiros nos últimos anos:

Item 4 - estimulou a adoção de taxas de câmbio flutuantes nos países em desenvolvimento.