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In a recent poll, 126 people were asked if they liked dogs, and 6% said they did. Find the margin of error of this poll, at the 90% confidence level. Give your answer to three decimals.
Is there a relationship between whether or not someone completed and returned their 2011 census report and their opinion of gun control?
Discuss whether this variable should be placed in the model as an ordinary quantitative variable or by means of four 0, 1 indicator variables.
State the appropriate set of hypothesis to test whether there is a relationship between the variables X and Y.
If the basket ball player is a 74% free throw shooter, then, on average, how many free throws will he or she make in a game with eight free throw attempts?
What percentage of the variation in y can be explained by the corresponding variation in x and the least-squares line? What percentage is unexplained?
The amount of time a bank teller spends with each customer has a population mean = 3.1 minutes and population standard deviation = 0.4 minute.
Use this poll result to give 70%, 80%, 90% and 99% confidence intervals for the proportion of all adults who feel this way. What do your results show about the effect of changing the confidence level? (Use Excel)
Six groups of randomly selected students matched for IQ and age were formed. Each student was taught a concept of time by using one of three methods: Lecture, demonstration
A psychologist interested in political behavior measured the square footage of the desks in the official office of four U.S. governors and of four chief executive officers (CEOs) of major U.S. corporations.
Assuming for a moment that 35% of all Ralph's customers have a discount card, what is the probability of getting a sample proportion at least this big?
A measure of central tendency, and variability. Report the findings in the APA format and write a brief paragraph describing your findings.
Using a previous exercise about Hallux abducto valgus (HAV) (deformation of the big toe that often requires surgery). Doctors used x-rays to measure the angle (in degrees) of deformity in 38 consecutive patients under the age 21 who came to a medi..
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