Using the variance values obtained, you might determine if the spread of the data within each of the two years has changed between 2022 and 2023. What does this mean for Mr Sweet's contention that sales have stabilised? , discuss which three factors influence the width of the confidence interval and - in general terms - how changes in each factor would change the resultant interval

2022
	Confidence levels	Confidence Interval
Lower bound	Upper bound
95%	89.97	102.64
90%	91.02	101.59
2023
	Confidence levels	Confidence Interval
Lower bound	Upper bound
95%	101.42	113.88
90%	102.46	112.85