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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.
Using number of car wrecks as the x variable and ice cream sales as the y variable, an r value of r=0.923 is then computed and shown to exceed the critical value for this data. The data is double checked and verified. This shows that car wrecks cause ice cream sales.
A simple random sample of 1600 families is chosen. What is the chance that between 9% and 11% of the sample families will not own car?
A slot machine in Reno costs $1 to play. If the jackpot is $1,000 and the expected value is $ - 0.50 find the probability of winning.
Give a variable that could be used to stratify the population for each of the following studies. List at least four subcategories for each variable.
It is better to use the median rather than the mean for a distribution when:
Construct a 95% confidence interval estimate for the population proportion of adults who report that e-mails are easy to misinterpret.
Assume that a simple random sample has been selected from a normally distributed population and test the given claim. Use the p-value method for testing hypotheses.
Each egg was also measured for volume using a water displacement method. We wanted to know if the two methods agreed or not
A standard slot machine has three reels. The first reel has 3 walnuts, 7 cherries, 3 oranges, 5 lemons, 1 bell, and 1 jackpot bar. The second reel has 7 cherries, 6 oranges, 1 lemon, 3 bells, and 3 bars. The third reel has 4 walnuts, 7 oranges, 5 ..
If one person is selected at random, what is the probability that person is Female?
The 2010 Chevrolet Camaro with an eight-cylinder engine and automatic transmission has a combined gas mileage of 19 mpg. What percent of all vehicles have better gas mileage than the Camaro?
Given a normal distribution of data, we know from the Empirical Rule that in between 2 standard deviations from the mean
Plot Kaplan-Meier Survival curve estimates along with true survival curve for n=25,100,1000
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