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Question: Merlins breeding The percent of an animal species in the wild that survives to breed again is often lower following a successful breeding season. A study of merlins (small falcons) in northern Sweden observed the number of breeding pairs in an isolated area and the percent of males (banded for identification) that returned the next breeding season. Here are data for seven years:
Make a scatterplot to display the relationship between breeding pairs and percent return. Describe what you see.
a company wished to study the effectiveness of a coffee break on productivity of its workers. the productiveness of
intelligence tests are designed to provide a normal distribution of iq scored whith a mean of 100 and a standard
In a test of a gender-selection method, 14 babies are born and 10 of them are girls. Find the number of different possible sequences of genders that are possible when 14 babies are born
Sketch a scatterplot in which the presence of an outlier decreases the observed correlation between the response and explanatory variables. Indicate on your plot which point is the outlier.
An independent random sample of 250 items made by supplier B reveals that 38 are defective. Is one supplier more reliable than the other? Explain.
Variance of 4.2 and mean of 23.2 were calculated. Find out 95% confidence interval on mean and standard deviation. Describe any potential problems with this analysis.
At the 5% significance level, do the data indicate that the interest rate received on a loan is dependent on race?
Assume you have received a class assignment to determine the attitude of students in your school toward the school's registration process. What are the validity issues you should be concerned with?
You are having a meeting with the employees of Financial Outsourcing, Inc. During the meeting, you were asked several questions. Give your opinion to the questions.
Teenage pregnancies. The U.S. National Center for Health Statistics reports for 2006 the distribution of teenage pregnancies by age range and ethnicity of the mother.
In a well-shuffled ordinary 52-card deck, what is the probability that the ace of spades and the ace of clubs are adjacent to each other?
In Excel use the Descriptive Statistics and comment on the mean, the skewness, the standard deviation and kurtosis.
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