Quick questions on Estimation and confidence intervals: point estimates and intervals for a mean and a proportion - SQA Advanced Higher Statistics

2short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is q1?

Show answer

A large sample of

n = 100

has

\bar{x} = 30

and known

\sigma = 5

. Find a

95\%

confidence interval for

\mu

. [2 marks]

What is q2?

Show answer

State the degrees of freedom for a t-interval from a sample of size

20

. [1 mark]

Have a question we have not covered?

This dot-point answer is short enough that we have not extracted many short questions yet. Read the full dot-point answer or ask Mo, our study assistant, in the chat for follow ups.

All StatisticsQ&A pages