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’n Opname ondersoek die proporsie studente wat ʼn skootrekenaar besit. ’n Ewekansige steekproef van 100 studente word gekies en 56 van hulle het aangedui dat hulle wel ʼn skootrekenaar besit. Die 90% vertrouensinterval vir die proporsie van alle studente wat skootrekenaars besit is / A survey investigates the proportion of students who own a laptop. A random sample of 100 students results in 56 who indicate that they do own a laptop. The 90% confidence interval for the proportion of all students who own laptops is