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Q:1 Most penguin species are not sexually dimorphic, which means that there are no obvious outward body characteristics which indicate gender. Therefore, penguin gender must be determined by a blood test. A penguin researcher is interested in estimating the proportion of females in a large penguin population. She takes a random sample of n = 20 penguins, and determines the gender of each one using a blood test. She finds 12 males and 8 females. Let π be the proportion of females in the population.
Q:2 A university is conducting a survey in order to estimate the results of an upcoming local election. They intend to take a simple random sample of individuals from the population of eligible voters. Each selected individual will be asked whether they will vote for Candidate A, yes or no. The university intends to use the results to create a 95% CI for the population proportion of voters who will vote for Candidate A. They desire the interval to have a half-width of no more than 0.03. How many individuals must they sample? (Hint: the half-width of a CI for a population proportion is maximized when the sample proportion is set to p = 0.5.)
If it is known that Trish drew at least 1 black card, what is the probability that she drew no more that 2 black cards? Hint: Use your table from part (a)
suppose duration of human pregnancies are somewhat skewed with mean 263 days and standard deviation of 19 days.
Create a frequency table and histogram for each of the numerical variables in this data set. Indicate whether each of these distributions is approximately symmetric or skewed. Which, if any, of these distributions are skewed to the right? Which, i..
you want to develop a 90 confidence interval with a margin of error of 7. if the population standard deviation is 49
Whats the most appropriate procedure for evaluating the relationship between tenure and divorce and what is the correlation and how can it be interpreted in terms of magnitude, direction and practical importance?
Identify a decision process within your work or business interests that could be resolved based on data.
Is there a linear relationship between age and education, and if so, how strong is that relationship? Is it possible to predict educational level based on age? If so, what limitations exist for the developed method?
during ejection from a military airplane the pilots acceleration must not exceed 16g ig injury is to be avoided.
The estimated proportion nonconforming of the transmission systems is 0.003. Using Deming's kp rule, what inspection policy should be used?
He completed 1st seven times, 2nd three times, and one time each in 6th, 9th,12th, 15th, 22nd and 37t. Determine his median finishing position for the year.
a way to make screening tests more economical is to pool samples. suppose that we would like to screen for a rare blood
what distinguishes raw scores from difference scores besides the fact that difference scores are used in t-statistic
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