The data below are yields for two different types of corn seed that were used on adjacent plots of land. Assume that the data are simple random samples and that the differences have a distribution that is approximately normal. Construct a 95% confidence interval estimate of the difference between type 1 and type 2 yields. What does the confidence interval suggest about farmer Joe's claim that type 1 seed is better than type 2 seed?

Type 1

2167

1990

2060

2497

2178

1922

2173

1518

Type 2

2062

1994

2095

2433

2118

1921

2132

1486

In this example,

mu Subscript d is the mean value of the differences d for the population of all pairs of data, where each individual difference d is defined as the type 1 seed yield minus the type 2 seed yield.

The 95% confidence interval is

nothing

less thanmu Subscript dless thannothing.

(Round to two decimal places as needed.)