(b) A researcher wishes to test the claim that the average cost of buying a condominium in Cyberjaya, Selangor is greater than RM 480,000. The researcher selects a random sample of 70 condominiums in Cyberjaya and finds the mean to be RM 530,000. The population standard deviation is to be RM 75,250. Test at 1% significance level whether the claim is true.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 30PPS
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(b)
A researcher wishes to test the claim that the average cost of buying a condominium in
Cyberjaya, Selangor is greater than RM 480,000. The researcher selects a random sample of 70
condominiums in Cyberjaya and finds the mean to be RM 530,000. The population standard
deviation is to be RM 75,250. Test at 1% significance level whether the claim is true.
(c)
It has been found that 30% of all enrolled college and university students in the Malaysia are
postgraduates. A random sample of 800 enrolled college and university students in a particular
state revealed that 170 of them were undergraduates. At a = 0.05, is there sufficient evidence
to conclude that the proportion differs from the national percentage?
Transcribed Image Text:(b) A researcher wishes to test the claim that the average cost of buying a condominium in Cyberjaya, Selangor is greater than RM 480,000. The researcher selects a random sample of 70 condominiums in Cyberjaya and finds the mean to be RM 530,000. The population standard deviation is to be RM 75,250. Test at 1% significance level whether the claim is true. (c) It has been found that 30% of all enrolled college and university students in the Malaysia are postgraduates. A random sample of 800 enrolled college and university students in a particular state revealed that 170 of them were undergraduates. At a = 0.05, is there sufficient evidence to conclude that the proportion differs from the national percentage?
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