Bootstrap distribution
What is the center of Bootstrap distribution?
BPE
What is the center of a randomized distribution?
Null Value
Proportion of sample answers as extreme as or more extreme than the original sample.
How many dots are chopped off on which side to find the 80th percentile of a distribution if there are 1000 dots in the distribution?
800 dots from the left side.
200 dots from the right side.
A study concluded that the average home prices in the city of Canton is 265 (in thousands). A group of students conducted a study on a sample of houses and found the average home prices in Canton to be 146.8 (in thousands). Test to see if the average home price in the city of Canton is less than 265.
Write the null and alternative hypotheses. Also provide the null value.
Null value =
Find the p-value of the following graph if it is a right tailed test. The sample statistic is 12 and number of dots is 200.
0.045
Find the 95th percentile of the following dot plot if there are 1000 dots in the distribution:
9
Are the given hypotheses valid? Give reasons
Not valid
Valid
Not valid
Find the p-value if it is two tailed test.
Sample statistic = 0.79
Number of dots = 100
0.10
In a study conducted by the Atlanta and St Louis cities, 500 people from each city were asked how much time of the day they spend commuting from their house to the workplace. The average number of minutes spent commuting was calculated from the data gathered by asking those 500 people from each city. The average commute time for the group in St. Louis was 21.97 and that for the group in Atlanta was 29.11. Find a 95% confidence interval for the difference in average commute time between the two cities when the standard error is 1.148 and interpret it.
4.883 to 9.348
A study concluded that the average home prices in the city of Canton is 265 (in thousands). A group of students conducted a study on a sample of houses and found the average home prices in Canton to be 146.8 (in thousands). Test to see if the average home price in the city of Canton is less than 265.
What does it mean if the sample result is statistically significant?
What does it mean if the sample result is not statistically significant?
If the result is statistically significant, it means there is evidence that the average home prices in Canton is less than 265.
If the result is not statistically significant, it means there is evidence that the average home prices in Canton is not less than 265.
Chapter 4.2. Histogram
b) BPE = 0.2, P-value = 0.392.
BPE = -0.4, P-value = 0.066
C)BPE = -0.4
D) Assuming the two campaigning methods are equally effective, there is a 6.6% chance that the next sample proportion for a phone call and flyer will be different.