In a sample of 50 households, the mean number of hours spent on social networking sites during the month
of January was 45 hours. In a much larger study, the standard deviation was determined to be 8 hours.
Assume the population standard deviation is the same. What is the 95% confidence interval for the mean
hours devoted to social networking in January?

The academic affairs council is the highest expert body processing academic affairs, as stipulated by the university statutes. specialist aaro häkkinen (educational policy) took part in the council’s meeting. the agenda of the meeting included bachelors’ feedback, the timing of pedagogical studies, the grant system for tuition fees, the standardisation of administrative practices for internships and the situation of foreign-language and multilingual master’s programmes.

The answer is 9.7 cm

The right answer is option d.