normality assumption - If my histogram shows a bell-shaped curve

I created a histogram for Respondent Age and managed to get a very nice bell-shaped curve, from which I concluded that the distribution is normal. Then I ran the normality test in SPSS, with n = 1

Normal probability plot - Wikipedia

1.2 - Population Distributions

Normal Distribution Examples, Formulas, & Uses

Statistics column

The normality assumption in linear regression analysis — and why you most often can dispense with it, by Christer Thrane (christer.thrane@inn.no)

Use SAS to Quickly Simulate and Graph Data from Different Distributions

How to graphically test normality?

The Normal Distribution: Understanding Histograms and Probability - Technical Articles

Bell Curve Definition: Normal Distribution Meaning Example in Finance