Data available regarding how much college students paid for textbooks per year showed an at $1,302 per year . A student researcher hypothesizes that in 2021 expenditures have decrease primarily due to the introduction of free online textbooks. To test the hypothesis, a sample of students are selected and their expenditures on textbooks is recorded. It is found that the mE sample studied was $1250, with a standard deviation of 5350. Use a 5% level of signicance. Is there statistical evidence of a reduction in expenditures on textbooks in 2021? a] State the appropriate test {Type 2 or t) [1 mark] b) State the null hypothesis. Which is correct: a)H0 : p. 2 1302 blHU I p. Z 1302 c)Ho 1p. 2 1250d)HQ :p. g 1302 Type a, b, c or d. Do not use brackets[1 mark] c) State the alternate hypothesis. Which is correct: adlfql I p. Z 1250 b}HA I p. Z 1302 CLHA 2 ,u. > 1302 d]HA 2 ,u.