4. The average cost of a hotel room in Al Kharj is said to be SAR 190 per night. A random sample of SAR 5. Test the hypotheses at significance level a = 0.05 25 hotels resulted in x = SAR 191.5 and S...

Question 4 and 5


Extracted text: 4. The average cost of a hotel room in Al Kharj is said to be SAR 190 per night. A random sample of SAR 5. Test the hypotheses at significance level a = 0.05 25 hotels resulted in x = SAR 191.5 and S = 5. A advertising company claims that it receives 15 % responses from its mailing. To test this claim, random samples of 200 were surveyed with 40 responses. Test the hypotheses at a =0.05.