2.1 The cost (US dollar: $) of a hotel room in 15 different locations in Bangkok is shown in the table below.

145	99	178
120	188	180
155	185	200
220	175	140
145	170	165

The average cost of a hotel room is said to be$140 per night. To determine if this is true, a random sample of 15 different room rates (in different locations) is taken. Test the appropriate hypotheses at alpha () = 0.05. Two-Tail Tests is selected. Do we reject the null hypothesis?Write a hypothesis test conclusion.

Remark: Show the detailed calculation

2.2 From question 2.1, testing using a confidence interval (Connection Between Two-Tail Tests and Confidence Intervals). Write a hypothesis test conclusion.

Remark: Show the detailed calculation

Question 3

From question 2 (same parameters), the population standard deviation = 30 is givenin this case. Test of Hypothesis for the Mean.Do we reject the null hypothesis?Write a hypothesis test conclusion.

Remark: Show the detailed calculation