Need results double checked

Data was retrieved from: https://www.kaggle.com/fedesoriano/heart-failure-prediction

Sample Data-

40	37	43	53	54
49	58	44	56	54
37	39	49	54	35
48	49	44	41	52
54	42	40	43	43
39	54	36	32	59
45	38	53	65	37
54	43	52	41	50
37	60	53	48	36
48	36	51	48	41

Computations-

1. The mean of my sample is 46.28
2. The standard deviation of my sample is 7.777623581

Confidence Intervals and Margin of Error-

1. The 80% confidence interval of my sample is
   1. (44.87, 47.69)

or

1. 46.28 plus or minus (+/-) 1.41
2. The margin of error for the 80% confidence interval is
   1. E = 1.41
3. This confidence interval means that there is an 80% chance (I am 80% confident) that a person will develop cardiovascular diseases between the ages of 44 and 47.

1. The 95% confidence interval of my sample is

1. (44.124, 48.436)

or

1. 46.28 plus or minus (+/-) 2.156 or 2.16 (when rounded 2 decimal places)
2. The margin of error for the 95% confidence interval is
   1. E = 2.156 or 2.16 (rounded)
3. This confidence interval means that there is an 95% chance (I am 95% confident) that a person will develop cardiovascular diseases between the ages of 44 and 48.

1. The 99% confidence interval of my sample is

1. (43.447, 49.113)

or

1. 46.28 plus or minus (+/-) 2.833 or 2.83 (rounded 2 decimal places)
2. The margin of error for the 99% confidence interval is
   1. E = 2.833 or 2.83 (rounded 2 decimal places)
3. This confidence interval means that there is an 99% chance (I am 99% confident) that a person will develop cardiovascular diseases between the ages of 43 and 49.

Trends-

The trend that takes place is as the confidence interval increases, the margin of error also increases.