Statistics.

webassign.net Chapter 8 Quiz - Math 119, section 33153, Summer 1 2020 | WebAssign Course Hero Course Hero + 6. [0.06/1 Points] DETAILS PREVIOUS ANSWERS ILLOWSKYINTROSTAT1 8. HW. 118. MY NOTES Suppose that insurance companies did a survey. They randomly surveyed 400 drivers and found that 350 claimed they always buckle up. We are interested in the population proportion of drivers who claim they always buckle up. NOTE: If you are using a Student's t-distribution, you may assume that the underlying population is normally distributed. (In general, you must first prove that assumption, though. ) Part (a) (i) Enter an exact number as an integer, fraction, or decimal. X = (ii) Enter an exact number as an integer, fraction, or decimal. n = (iii) Round your answer to four decimal places. p' = ( rounded to four decimal places) + Part (b) - Part (c) Which distribution should you use for this problem? (Round your answer to four decimal places.) P'~ Explain your choice . The Student's t-distribution should be used because vnpq s 10, which implies a small sample. The Student's t-distribution should be used because we do not know the standard deviation . The normal distribution should be used because we are interested in proportions and the sample size is large. The binomial distribution should be used because there are two outcomes , buckle up or do not buckle up . Part (d) + Part (e) Submit Answer MacBook Air 4 DO