Invalid expression. When calling a function or indexing a variable, use parentheses. Otherwise, check for mismatched delimiters. Can anyone help in this error?

prompt = " Mean Values:";
M = input(prompt)
prompt = "Range Values:";
R = input(prompt)
Mean = mean(M);
Mean
Range = mean(R);
Range
d = 2.326
n = 5
SE = Range/(d*(sqrt[n]);

Answer 1

[VBBV]

M = 1:10;
R = 200:300;
Mean = mean(M);
Range = mean(R)

Range = 250

d = 2.326;
n = 5;
SE = Range./(d*sqrt(n))  % check the parenthesis and  [ ] is used for concatenating numbers /arrays

SE = 48.0668