An agricultural field test compares two varieties of corn, silver queen and country gentlemen. the researches takes 10 plots and divides each of these plots in half. each plot has a similar amount of sun light, shade, quality of soil and irrigation. the variety of corn is randomly chosen for each half of a plot. after the harvest, the yield of corn is measured for each half plot at each location. the yield from silver queen was compared to the yield of country gentlemen. note: differences were taken by taking silver queen - country gentlementhe 95% confidence interval for the mean is (-0.223, 0.988).what is the correct interpretation of this interval? a. there is convincing evidence that variety a has a higher mean yield. b. there is not enough evidence to say that variety a has a higher mean yield then variety b. c. we have sufficient evidence to show that variety b has a higher mean yield than variety a. d. there is evidence to show that there is a difference between variety a and variety b.