Question

(9) Jessix how to sx + N: Assignmm x → C Written x Get Hom X C Tha Folk x AMS 110 x table.p x SZ table X Gradebox Roviow! * how to fix https://blackboard.stonybrook.edu/bbcswebdav/pid-5153460-dt-content-rid-37899722 1/courses/1198-AMS-110-SEC03-90411/Written%20HW%204.pdf Written HW 4.pdf 2/6 AMS 110.03 WRITTEN HOMEWORK 4 Problem 2: Complete the following lypollesis lest single critical valueella. w = 0.01 0.3 H, H: = 0.15 > 0.15 x = 150 Z-0.18 Critical values): Test statistic: Conclusion Problem 3: A major discount stuck Lokerage claim that customers calling in to make trees uu de stock market are left on hold for an average of about 22 seconds. Suppose an executive is concerned about the satisfaction levels of the company's clients and selects a random sample of 100 clients who phoned. The length of time that a client was left on bold was recorded. Assume that the sample can was 23.5 xxxmom hold. Supec it is known that the standard deviation of all hold times is 8 sends. Is there sufficient evidence to indicate that customers are left on bold for an average length of time w ter than 22 ronds? (1.rw of sinificare and the Pyx rhod.

the top one

Answer 1

Given that n-150 C-O.5 X-O.18 To test the hpothals Ho -O45 The mhcal Value known large n Z&Zo.01 2.5+5 Test Statishcs O.48-0.45 O.0408 Z=0.735 Ho. Here, Z<Za we fail to Rjet There is not Sutficient evidane to Support that ur0.45