QUESTION 4 A Hi-Tech company has introduced a new fash disk. Some dealers and customers have complained that some of the new disks are defective. In order to investigate this the company randomly tested 300 disks and found that 30 were defective. A 99% confidence interval for the proportion of all fash disks that are defective was (5.54%, 14.46%). Which one of the following statements is the correct interpretation of the results? None of these are true. Of all the fash disks 99% of the fash disks in the sample are defective between 5.54% and 14.46%. We are 99% condent that (5.54%, 14.46%) contains the true population proportion. With probability 99%, the confidence interval (5.54%, 14.46%) contains the true population proportion. QUESTION 5 A survey of 18 adults in UAE found that the mean age for a person's primary vehicle is 1.2 years and a standard deviation of 0.8 year. Assuming that the population is normally distributed. Find the lower confidence limit (LCL) of the 95% confidence interval for the population mean age. Round your answer to three decinal places. -0.341 QUESTION 6 Suppose the age of cars on the road is normally distributed with a mean of 9.4 years. If the standard deviation is known to be 2.2 years, what is the probability that 16 randomly selected cars have been on the road between 7 and 8 years? Round your answer to four decimal places. 0.0055 QUESTION 7 The price of iPhone 13 pro max is recorded at a random sample of 40 electronics stores in UAE. The resulting 90% confidence interval for the mean price of iPhone 13 pro max was (3240 Dhs, 3871 Dhs). Find the margin of error (E) of the 90% confidence interval. Round your answer to m decimal place. 315.5 3 points Save Answer 3 points V Saved