Please help number 4

3) You measure the length of 5 radish seedlings at 7 days and 10 days and get the following results in mm (do NOT use R except for part (d)): seedling #: 1 2 3 4 5 12 S 5 days: 30 20 38 49 32 33.8 10.686 7 days: 35 27 46 58 34 40 12.145 difference: -5 -7 -8 -9 -2 -6.2 2.775 (a) Is there a difference in length? (b) Repeat (a), but now use a regular (unpaired) t-test. (c) What happened in (b)? (d) Verify the normal distribution assumption for the paired t-test you did in (a). (You may use R for this part). 4) Here are data on the lengths of male and female roaches (in mm). Your job is to find out if there is a difference between male and female roaches. males 15.4 13.9 12.7 9.6 6.6 10.7 9.9 13.3 16.2 9.0 11.4 16.6 12.2 females 16.7 16.3 12.8 16.9 15.1 12.8 18.7 18.3 8.6 13.6 15.3 16.2 13.4 It's up to you to figure out what the best procedure is, what kind of hypotheses to use, which a to use, what test to use, and so on. Make sure you follow all the appropriate steps. You should probably use R as you'll get done much quicker. Remember to very clearly state your results in writing. Never turn in just an R printout. Hint: how do you decide which test to use? What kind of distributions do the data have