Use image to answer part 1-8

Part 2 To find the 99% confidence interval for the difference between the two populations, what tabulated value should be used? Hint: Using equation 7.19a the degree of freedom (df) is 11Section 8 A study was carried out to compare the salaries of first and second year forestry students during the summer of 1980. The random samples taken from the two populations are summarized below: Salary/Month 1st Year 2nd Year X $1,125 $1,310 S $300 $130 10 21 Answer the following questions (Part 1 to Part 8) using this description. Question 45 1 pts Part 1 To find the 90% confidence interval for the difference between the two populations, what distribution should be used? O t distribution F distribution O Z distribution O Chi square distributionPart 5 What is the standard deviation of the mean difference? Hint: When calculating the standard deviation of the mean difference, please assume that the variances of the two populations are unequal Part 6 What is the 90% confidence interval for the difference between the two population means? Lower confidence limit Upper confidence limit Hint: Please use two decimal places for your answer Question 51 1 pts Part 7 What is the 99% confidence interval for the difference between the two population means? Lower confidence limit Upper confidence limit Hint: Please use two decimal places for your answerPart 3 To find the 90% confidence interval for the difference between the two populations, what tabulated value should be used? Hint: Using equation 7.19a the degree of freedom (df) is 11Part 8 Based on your answers from Part 2 to Part 7 which of the following statements are correct or true? i. There is sufficient evidence to conclude that 1st Year students made less on average than 2nd Year students at alpha = 0.1 ii. There is not sufficient evidence to conclude that 1st Year students made less on average than 2nd Year students at alpha = 0.1 iii. There is sufficient evidence to conclude that 1st Year students made less on average than 2nd Year students at alpha = 0.01 iv. There is not sufficient evidence to conclude that 1st Year students made less on average than 2nd Year students at alpha = 0.01 i and iv None of the above i and iii i and