The definition of the arguments in the function is incorrect. It should say that x-bar and y-bar are the sample means, not x and y.
Correct the text
CORREL Part 4, Section 3.17.7.49
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Proposed Disposition of DIS 29500 Comment GR-0107 (Modified: 2007-10-17) Agreed; the following changes will be made to the formulas indicated at the start of each change: 1. STDEV, STDEVA, STDEVP, STDEVPA, VAR, VARA, VARP, VARPA, and ZTEST: Replace "x is the sample mean" with "x is the sample value, and x-bar is the sample mean". 2. CORREL, COVAR, FORECAST, INTERCEPT, PEARSON, RSQ, SLOPE, and STEYX: Replace "x and y are the sample means" with "x and y are the sample values, and x-bar and y-bar are the sample means". 3. LINEST: Replace "x and y are sample means" with " x and y are the sample values, x-bar and y-bar are the sample means". 4. KURT: Append to "where s is the sample standard deviation" the text ", n is the number of data points in the range, x is the sample value, and x-bar is the sample mean”. Similar Comments: AU-0029 , CA-0052 , CL-0156 , CL-0157 , CL-0160 , CL-0161 , CL-0162 , CL-0163 , CL-0164 , CL-0165 , CL-0167 , CL-0168 , CL-0169 , CL-0170 , CL-0181 , CL-0183 , CO-0173 , CO-0193 , ECMA-0028 , FR-0461 , FR-0465 , FR-0469 , FR-0470 , FR- 0478 , FR-0479 , FR-0483 , FR-0484 , FR-0485 , FR-0486 , FR-0487 , FR-0488 , FR-0491 , FR-0492 , FR-0493 , FR-0494 , FR-0504 , FR- 0506 , GB-0385 , GB-0387 , GB-0406 , GB-0410 , GB-0412 , GB-0413 , GB-0420 , GB-0422 , GB-0425 , GB-0426 , GB-0427 , GB-0428 , GB-0429 , GB-0430 , GB-0432 , GB-0433 , GB-0434 , GB-0435 , US-0184 , US-0186 , US-0203 , US-0207 , US-0209 , US-0210 , US-0217 , US-0218 , US-0221 , US-0222 , US-0223 , US-0224 , US-0225 , US-0226 , US-0228 , US-0229 , US-0230 , US-0231 , UY-0013
Dupe of Ecma 28