Rework Exercise 16,6 by using the signed-rank test,
In Exercise 16,6
Two types of instruments for measuring the amount of sulfur monoxide in the atmosphere are beting compared in an air-pollution experiment. The following readings were recorded daily for a period of 2 weeks:

Using the normal approximation to the binomial distribution, perform a sign test to determine whether the different instruments lead to different results. Use a 0.05 level of significance.

Sulfur Monoxide Instrument A Instrument B Da 0.96 0.82 0.75 0.61 0.89 0.64 0.81 0.68 0.65 0.84 0.59 0.94 0.91 0.77 0.87 0.74 0.63 0.55 0.76 0.70 0.69 0.57 0.53 0.88 0.51 0.79 0.84 0.63 5 6 10 12 13 14