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Explain what is wrong and why it is wrong.
1.If the claim says that the population mean is greater than 200 and the sample mean is 215, we can say that the claim is true even without a formal test.
2.A value of r = 0.851 shows that there is very little linear relationship between the two variables being compared.
3.A value of r = 0.158 shows that there is very little relationship of any kind between the variables being compared.
4. If a correlation coefficient of r = 0.642 was found between two variables in a sample of paired data that were measured in feet, the value of r would change by a factor of twelve if the data were converted to inches and r was computed again.
5.Using data from Boston, Massachusetts, a test of independence is run on the claim that ice cream sales per month and the number of car wrecks per month are independent. The claim is rejected.
In the publication Employment and Earnings, information on the ages of people in the civilian labor force was published. Seventy-five people in the civilian labor force are randomly selected.
At the end of 24 weeks of treatment, subjects were classified as responders or non-responders to treatment based on a battery of psychological tests.
The Swansons are planning to fly to Hawaii from Toronto with a stopover in Los Angeles. There are five flights they can take between Toronto and Los Angeles and ten flights between Los Angeles and Hawaii.
The population variances are 4.6 and 5.0 respectively. Using a level of significance of .05, is there evidence that the dual degree students are receiving lower grades?
The sameple you found that 114 of those adults sampled over the age of 24 smoke. Develop a 95% condience interval for the current porportion of adults over the age of 24 who smoke.
Two teams of workers assemble automobile engines at a manufacturing plant. Quality control personnel inspect a random sample of the teams assemblies and judge each assembly to be acceptable or unacceptable.
The p-value of the test is closest to:
If the standard deviation is 4.09, how large a sample is needed to get the desired information to be accurate within 0.53 decibels? Show all work.
SAT verbal scores are normally distributed with a mean of 423 and a standard deviation of 91. Use the Empirical Rule to determine what percent of the scores lies between 423 and 514.
Is there a relationship between whether or not someone completed and returned their 2011 census report and their opinion of gun control?
Approximately 65% of all marketing personnel are extroverts, whereas about 50% of all computer programmers are introverts.
Use descriptive statistics to summarize the data from the two studies. What are your preliminary observations about the depression scores?
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