width of the confidence interval to increase

sample size to increase

width of the confidence interval to remain the same

width of the confidence interval to decrease

The researcher surveys the first 100 students who arrive at the cafeteria on a Monday morning.

The researcher surveys the first 100 students who arrive at the cafeteria on a Friday morning.

The researcher surveys 100 students who volunteer to participate in the survey.

The researcher assigns a unique number to each student and uses a random number generator to select 100 students.

The most common reported profit of NZ companies listed on the NZX was $0.104 billion

The range of the profits was $7.94 billion, indicating there may be some outliers in the data 

On average, profit values deviate from the mean by $0.249 billion

The mean is greater than the median, indicating that there is a large negative skew

The standard error of the mean will remain exactly the same

The standard error of the mean will likely become smaller.

It's impossible to predict the effect on the standard error

The standard error of the mean will likely become larger.