[ ] c. What is the mean and variance of the number of defectives of the sample in part b) ? [ ] d. If we were to check the fuses one by one then, i) What is the probability of getting the first defective fuse? [ ] ii) What is the probability of getting […]
2.236) / 2.236 ___________ In H 503 calculate the mean of the 500 sample standard deviations: _________________ Assuming that the POPULATION STANDARD DEVIATION = 5, calculate the percent error in the mean of the 500 sample standard deviations: 100 (Actual Refer to the statement in Step 20 about an unbiased statistic. Does the sample standard […]
Assuming that the measurements are normally distributed with expectation equal to the correct percentage, each student calculates a 95% condence interval for the percentage based on his or her data. When the results are collected, two of the students discover that their condence intervals dont even overlap. A student in the course who is also […]
[4] In a past presidential election, the actual voter turnout was 61%. In a survey, 1002 subjects were asked if they voted in the presidential election.a)Find the mean and standard deviation for the number of actual voters in groups of 1002.b)In the survey of 1002 people, 701 said that they voted in the last presidential […]
13.If r = 0.84 and N = 5, the value of tobt for the test of the significance of r is ____.Student Response Feedback1. 1.962. 3.463. 2.684. 2.40
A company has 11 salespeople. A board member at the company ask for a list of the top 3 salespeople, ranked in order of effectiveness. How many lists are possible? Assume that the order of salespeople on the list is relevant.
1. The file housing.txt contains data on 28 houses. (a) Suppose we want to use linear regression to predict a house’s selling price based on the total area of the property (listed under site.area, in thousands of square feet). What least squares line do we obtain? (b) Construct a scatterplot of selling price vs. site area, and […]
1. A full house in poker is a hand where three cards share one rank and two cardsshare another rank. How many ways are there to get a full-house? What is the probability of getting a full-house?
Unoccupied seats on flights cause airlines to lose revenue. A large airline wants to estimate its average number of unoccupied seats per flight over the past year. To accomplish this, the records of 225 flights are randomly selected, and the number of unoccupied seats is noted for each of the sampled flights. The summary statistics […]
A Mountain Peak University instructor is interested in the average number of days Mountain Peak University science students are absent from class during a quarter. What is the population she is interested in?
