Question:

As an international development researcher, you would like to know African Citizen's perceptions about current levels of democracy. Your working hypothesis is that a series of reforms have increased African views of the level of democracy today. You do not have a good research design to compare attitudes before and after the reforms, but know that leaders and development experts would like to see a value of 6, on the scale of 1-10. Using the data from the 2015 Afrobarometer, determine whether perceptions about current levels of democracy statistically differ from a value of 6.?

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\fYou are trying to develop a strategy for investing in two different stocks. The anticipated annual retum for a $1 r000 investment in each stock under six different economic conditions has the probability distnbution shown to the light. Complete parts (a) through ((1) below. a. Compute the expected return for Stock X and for Stock '1'. The expected return for Stock X is $ 56.2 . (Type an integer or a decimal} The expected return for Stock Y is $ 40.21 . (Type an integer or a decimal} b. Compute the standard deviation for Stock X and for Stock Y. The standard deviation for Stock X is $ 58.85 . (Round to two decimal places as needed.) The standard deviation for Stock Y is $ 203.61 . {Round to two decimal places as needed.) c. Compute the covariance of Stock X and Stock Y. The covariance of Stock X and Stock Y is 11 ,16110'. (Round to two decimal places as needed.) d. Would you invest in Stock X or Stock Y? Explain. Returns Probability Economic Condition Stock X Stock '1' 0.01 Extreme recession 100 0T9 0.09 Recession T0 300 0.25 Stagnation 30 120 0.35 Slow growth 80 120 0.20 Moderate growth 120 150 0.10 High growth 140 350 D. It is better to invest in Stock because it has a lower standard deviation while yielding a higher expected return. \fWith n = 175 and p = 0.34, find the probability P(X = 50) using the binomial distribution and the normal approximation to the binomial distribution if the conditions for normal approximation to the binomial distribution are met. With n = 175 and p = 0.34, find the probability P(X