Practice / Data & AI

Confidence interval for a mean

Easy · Whiteboard

You sample 400 users. Mean session length is 12 minutes, standard deviation 8 minutes. Give a 95% confidence interval for the true mean and explain what it means.

Create a free account to answer it and get scored on what a strong answer covers.

InterviewMe: practise job interviews out loudAnswer real interview questions by voice and get a score, what worked, and what to fix for every answer. Built for co-op students, new grads and career switchers in Canada.Behavioural interview practice · Interview questions by role · PricingYou need JavaScript enabled to use the practice tool.