Can somebody please explain thoroughly how to do question #3. I have worked through to get the z score 2.02 but am unsure how to use this to get the critical value for the one tailed test and then what to do with that. Also what H0 or Ha means. Please explain every step involved and why it is being done/where values are coming from.I've read through the textbook and online over and over but just dont get it. Thank you

Q1:	What is the standard error of the mean?												Week	Number of People Staying at the Hotel
																	1	200
				Answer:			15.3492										2	300
																	3	380
					Standard deviation/square root of sample #								4	250
																	5	350
Q2:	How would the standard error change if the sample size had been 100 instead of 35?								6	320
	(Assume that the sample standard deviation did not change.)										7	300
																	8	220
	The standard error will decrease if the sample size is increased to 100.									9	220
	Standard error and sample size are inversely proportional. This means that as the sample size increases, the standard error will decrease.			10	420
																	11	340
																	12	140
Q3:	Test the marketing manager's claim, and provide your conclusion about whether or not the new plan						13	440
	increased the number of people staying at the hotel.											14	320
	Note: The population standard deviation = 82 is assumed known, and the level of significance is = .05.					15	440
																	16	290
																	17	290
											Original average	300				18	480
											Sample average	328				19	350
																	20	440
				Z=(x-)/(/n)												21	300
				Z=(328-300)/(82/35)											22	110
																	23	260
				Z=2.02													24	320
																	25	480
																	26	310
																	27	280
																	28	400
																	29	410
																	30	390
																	31	420
																	32	260
																	33	290
																	34	320
																	35	440