A spectrophotometer used for measuring CO concentration ppm

Last updated: 5/12/2023

A spectrophotometer used for measuring CO concentration ppm parts per million by volume is checked for accuracy by taking readings on a manufactured gas called span gas in which the CO concentration is very precisely controlled at 69 ppm If the readings suggest that the spectrophotometer is not working properly it will have to be recalibrated Assume that if it is properly calibrated measured concentration for span gas samples is normally distributed On the basis of the six readings 69 77 68 85 72 and 82 is recalibration necessary Carry out a test of the relevant hypotheses using a 0 05 State the appropriate null and alternative hypotheses Ho 69 H 69 Ho 69 H 69 Ho 69 H 69 Ho 69 H 69 Ho 69 H 69 USE SALT Calculate the test statistic and determine the P value Round your test statistic to two decimal places and your P value to three decimal places t P value