4. (填空题, 2.0分) Give the sample space of rolling a six-sided die_
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- According to AC Lens, green eye color is one of the rarest with only 2% of the world's population having that eye color. A random sample of 1000 people from around the world are selected. Let ?ˆp^ be the proportion of the sample which has green eyes. What is the mean of the sample proportion? AnswerVariability between cells is partitioned into three additional sums of Squares. What are they?A researcher selected 100 passengers from each of 3 airlines and asked them if the airline had lost their luggage on their last flight.The number of passengers who lost luggage at airline 1 is 2, airline 2 is 14 and airline 3 is 1 You want to test the daim that the proportion of passengers from each airline who lost luggage an the flight is the same for each airline. What is the value of test statistic? Your answer: O chi^2 0 -21.15 O chi^2 0 10.77 O chi^2_0 =19.58 Ochi^2 0 =13.31 chi^20 =16.25 Clear answer
- A company that manufacturers wooden products (e.g. garden furniture, ladders, benches) regularly maintains its lathe machines, which are used for cutting and shaping The manager would like to know whether the cost of machine maintenance is related to the age of the machines. For a random sample of 12 lathe machines in the company’s factory, the annual maintenance cost (in R100s) and age of each machine was recorded. Machine Age (years) Annual cost (Rand) 1 4 45 2 3 20 3 3 38 4 8 65 5 6 58 6 7 50 7 1 16 8 1 22 9 5 38 19 2 26 11 4 30 12 6 35 Identify the independent variable and the dependent Show the data graphically in a scatter plot. What relationship is observed? Calculate the correlation coefficient between the age of lathe machines and their annual maintenance costs. Comment on the strength of the Is the correlation statistically significant? Test at the 5%…Please do not give solution in image format thankuLet X be a random variable representing the number of times that you have to roll two dice until you get ten 11's. Calculate the mean and variance of X.
- please only help me identify: the indivisual the sample the population the variable info that is collected from each indivisual type of variable wording in context, and random variable. *(comes from one question.) thanks!Prove the general formula for interval estimation of ratio of population variance.A bank recieve average 6 bad cheks per a day what is probabilty that bank recieve 4 bad cheks