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1a. If correlation coefficient r = 0.65, what does the coefficient of determination equal? Interpret your result.
b. A study of 20 worldwide financial institutions showed the correlation between their assets and pretax profit to be .86. At the .05 significance level, can we conclude that there is positive correlation in the population? Show how you arrived at your answer.
c. A hypothesis test is conducted at the .05 level of significance to test whether or not the population correlation is zero. If the sample consists of 25 observations and the correlation coefficient is 0.60, what is the computed value of the test statistic? Round to two decimal places.
d. In the least squares equation, Y = 10 + 20X, explain what the value of 20 indicates.
In a sample of 18 belts, suppose x¯ = 1049. Should the assembly line be shut down? Justify your answer using the Z distribution and the appropriate.
A survey was conducted to measure the height of men. In the survey, respondents were grouped by age. In the 20-29 age group, the heights were normally distributed, with a mean of 67.8 inches and a standard deviation of 4.0 inches. A study particip..
The Schur recursion is a mapping from the autocorrelation sequence rx(k) to a set of reflection coefficients.
Let X be the number of heads in 20 fair coin tosses, Y a number picked uniformly at random from {0, 1, . . . 20}, independently of X. Let Z = max(X, Y).
Which of the four combinations (I, M ), (NI, M ), (I, NM ), and (NI, NM ) are permissible? -Construct an example for those combinations that are permissible.
a survey of 100 recent fatal traffic accidents showed that 60 were alcohol-related. find the 95 confidence interval of
Normally distributed with a mean of $ 1750 and a standard deviation of 300. What's the probability that a randomly selected state has a per capita GNP at or below $950?
1. If the sampled population has a mean 48 and standard deviation 18, then the mean and the standard deviation for the sampling distribution of X (X-bar) for n=9 are:
Identify at least 2 variables for which you would utilize a repeated-measures ANOVA in your analysis. Describe the variables and their scale of measurement.
A poll found that 329 out of 763 adults said they would travel to outer space in their lifetime, given the chance. Estimate the true proportion of adults who would like to travel to outer space with 92% confidence.
Using the five steps of hypothesis testing and the 5% significance level (alpha), does showing the film change students' attitudes towards the chronically mentally ill?
Consider the following regression output†: ˆ Yi = 0.2033 +0.6560Xt se =(0.0976) (0.1961) r2 = 0.397 RSS=0.0544 ESS=0.0358 where Y=labor force participation.
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