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- An independent research group is interested in showing that the percentage of babies delivered through the the Cesarian section decreases. For the past years, 20% of the babies were delivered through the Cesarian section. The research group randomly inspects the medical records of 144 births and finds that 25 of the births were by Cesarian section. Can the research group conclude that the percent of births by Cesarian section has decreased at 5% level of significance?in agenetic experiment on peas one sample of offspring contained 366 green peas and 428 yellow peas based on those results estimate the probality of getting an offspring pea that os green is the result reasnably close to the value of 3/4 that was expectedIf the expected return on the market is 8% and the risk for your rate is 4%. What is the expected return for a stock with a beta equal to 2.00? 
- The time between arrivals of taxis at a busy intersection is exponentially distributed with a mean of 10 minutes. If this scenario was simulated, the random interarrival time variate in minutes calculated from the U(0, 1) random number generator value 0.4258 is closest toIf X is a continuous random variable, what is the value of X that will be exceeded 30% of the time, if X has a gamma distribution with a mean of 2 and a variance of 2? (just set up the equation in itssimplest form)A lumber company in East Texas is interested in the quantitative traits responsible for faster growth in trees. First they need to identify how many genes are involved in tree growth. The researchers of the company start by crossing trees that grow 6 inches per year (ipy) with trees that grow 24 ipy. From this cross trees that grow 15 ipy were obtained. If two 15 ipy trees are crossed, a binomial pattern is observed with 6 and 24 ipy trees occurring at a rate of 1/64. If a 15 ipy F1 individual is crossed to a 24 ipy individual, what is the probability of observing a 21 ipy individual?
- For a sample of 10 individuals, a researcher calculates residuals for the relationship between “number of delinquent friends” and “number of prior arrests” and finds that the positive residuals = 125. The researcher then collects a second sample of 10 individuals and calculates the residuals on the same two variables and discovers the sum of the positive residuals = 75. What can you conclude about the strength of the relationship between “number of delinquent peers” and “number of prior arrests” across these two random samples? How are they similar/different?A nutritionist believes that obesity is more prevalent among American adults than it was in the past. He discovers that in a study conducted in the year 1994, 380 of the 1630 randomly chosen adults were classified as obese. However, in a more recent study, he finds 726 out of 2350 randomly chosen adults were classified as obese. At α = 0.05, do these studies provide evidence to support the nutritionist's claim that the proportion of obese adults has significantly increased since 1994?For the past years, 20% of the babies were delivered through cesarean section. The research group randomly inspects the medical records of 144 births and finds that 25 of births were by cesarean section. Can the researcher group conclude that the percent of births by cesarean section has decreased at 5% level of significance?
- What value of the threshold (alpha) should be used so that the number of clicks are maximized, but a click-through-rate of 0.45 or greater is achieved.You have conducted a series of experiments to reduce the proportion of scrapped battery cells to 1% in your manufacturing plant. What is the probabilty of testing 51 cells without finding a defect until the last cell?The desired seeding rate of a farmer on his corn field is 90,000 seeds per hectare. If emergence of 90% is expected, what should be expected plant population?
