In a survey of 2450 golfers showed that 281 of them are left-handed. Construct a 98% confidence interval for the proortion of golfers that are left-handed.

Confidence intervals are used to find a region in which we are 100 * (1 - α) % confident the true
value of the parameter is within this interval.

For large sample confidence intervals about the population proportion you have:

Sp ± z * sqrt (Sp * (1- Sp) / n)

where Sp is the sample proportion
z is the score for having α% of...