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According to a recent survey of 500 randomly selected residents of Popular City, it was found that 38% are in favor of raising city taxes in order to build a new stadium for the local baseball team.
a) What is the population of interest of the survey?
b) Is the 38% a statistic or a parameter?
For sample of size 100, what is the mean and standard deviation of the sample mean.
Think about a density curve that consists of two line segments. The first goes from the point (0, 1) to the point (0.7, 1). The second goes from (0.7, 1) to (0.9, 2) in the xy-plane. What percent of observations fall below 0.70?
Compute test statistic for sample data that you would use to test whether sample mean varies from population mean of 10 pounds at a 5 percent level of significance in two-tailed test.
Determine following probabilities where Z follows standard Normal distribution?
Write down the probability of that the median of the sample or average medians is greater or more than 320 minutes?
Make a scatter plot of Y and X1 using Word. To do this click on insert and then chart. Click on X Y (Scatter). Enter the data from the table.
A manager of a small store wanted to discourage shoplifters by putting signs around the store saying "Shoplifting is a crime!" However, he wanted to make sure this would not result in customers buying less.
Write up your results by using scientifically recognized form.
Assume that the standard deviation of college student IQ's is 10. A random sample of 100 students from a college showed an average IQ of 110. Compute a 95% confidence interval for the mean IQ of students attending this college.
Given what you've learned in this module about the meaning of "statistics", choose one of the examples from Part I (A-F), and raise a relevant question of your own that could be answered by a statistician.
Using a 5% level of significance, is there any difference in proportion of guests who would select the two resorts? What is your conclusion?
What does central limit theorem say about distribution of John's average payoff after 365 bets in a year?
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