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This is also given Exercise. The CNN website sometimes has a small box called "Quick vote" that contains a question about an interesting topic in the news that day. For example, one question in February 2010 asked, "Should the U.S. military let gays and lesbians serve openly?" Visitors to the website are invited to click their response and to view the results. When the results are displayed, they contain the message, "This is not a scientific poll."
a. What type of sample is obtained in this "Quick vote?"
b. What do you think is meant by the message that "This is not a scientific poll?"
Exercise The CNN website sometimes has a small box called "Quick vote" that contains a question about an interesting topic in the news that day. For example, one question in February 2010 asked "Should the U.S. military let gays and lesbians serve openly?" Visitors to the website are invited to click their response and to view the results. When the results are displayed they contain the message "This is not a scientific poll."
a. What type of sample is obtained in this Quick vote?
A certain medication is known to increase the pulse rate of its users. The variance of the pulse rate is known to be 10 beats per minute.
If f is upper semicontinuous on a compact space S, show that for some t ∈ S, f (t ) = sup f := sup{ f (x ): x ∈ S}. Hint: Let an ∈ R, an ↑ sup f . Consider f -1((-∞, an )), n = 1, 2,... .
The forecast for the third quarter is 3,000 units; the seasonal index for the quarter is 1.05. What are the seasonally adjusted sales for the quarter?
question for a population of 17 year old boys the mean subscapular skinfold thickness is 9.7 mm and the standard
For a continuous random variable x, the probability density function f(x) represents the probability at a given value of x. the area under the curve at x.
A 'good' correlation is data-context driven. For example, I did a project correlating sales volume per state and customer demographics (pretty 'hard' data) and got a .92 correlation.
indicates that the data provides a strong evidence against the null hypothesis. So reject the null hypothesis." - but what is H0 that we are rejecting?
Throughout the early 1800's the influence of industrialization and the repeated subjugation of Native Indians and slaves caused people to reflect on their role in society and attempt to reform elements of their daily lives.
As part of an ANOVA that compares three treatments, you carry out Tukey pairwise tests at the overall 5% significance level. The Tukey tests find that µ1 is significantly different from µ2 but that the other two comparisons are not significant. You..
Why don't researchers who want to test hypotheses about the relationships between variables worry a great deal about random sampling?
the amount of time it takes adults to fall asleep at night is approximately normally distributed with a mean of 23.45
Carrying intermediate computations at least 3 decimal places what is the the lower and upper limits of the 90% confidence interval?
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