C) Choose the critical value(s) for the test: O -1.282 O -1.645 O -1.96 0 -2.326 O -2.576 1.282 0 1.645 1.96 2.326 0 2.576 Submit part 1 mark Unanswered d) The librarian will the null hypothesis and conclude that the percentage of students who are studying at the library is 55%. not significantly different from significantly less than significantly different from Submit part not significantly less than not significantly more than 2 marks significantly more than Unanswered Calculate the estimated standard error of p.Bb https:/... U Exam N. The librarian at the university claims that 55% of the students are studying in the library. To test this claim a random sample of 50 students is selected and it was found that 20 of the 50 students are studying in the library. The librarian decides to use a = 0.1 as the level of significance. Let: p = proportion of students who are studying in the library. Given: The value of the test statistic is z = -2.13. a ) Give the null hypothesis. O Ho : P > 0.55 Ho : p