The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 121 and standard deviation of 15 . Someone qualifies as having Stage 2 high blood pressure if their systolic blood pressure is 160 or higher. a. Around what percentage of adults in the USA have stage 2 high blood pressure? Give your answer rounded to two decimal places. :96 b. If you sampled 2000 people, how many would you expect to have BP> 160? Give your answer to the nearest person. Note: I had a bit of an issue encoding rounded answers, so try rounding both up and down if there's an issue! c. Stage 1 high BP is specified as systolic BP between 140 and 160. What percentage of adults in the US qualify for stage 1? :h d. Your doctor tells you you are in the 30th percentile for blood pressure among US adults. What is your systolic BP? Round to 2 decimal places. The manager of a computer retails store is concerned that his suppliers have been giving him laptop computers with lower than average quality. His research shows that replacement times for the model laptop of concern are normally distributed with a mean of 4.4 years and a standard deviation of 0.4 years. He then randomly selects records on 35 laptops sold in the past and finds that the mean replacement time is 4.3 years. a. Find the probability that 35 randomly selected laptops will have a mean replacement time of 4.3 years or less. Round your answer to four decimal places. P(M g 4.3 years) = C] b. Based on the result above, does it appear that the computer store has been given laptops of lower than average quality? 0 Yes. The probability from the sample shows that there's a possibility that the owner is given laptops lower than average quality. 0 No. The probability from the sample shows it is unlikely that the owner is given laptops lower than average quality