consider the accompanying data on X = research and development expenditure thousands of dollars and Y = growth rate % per year for eight different industries.

X 2027 5033 906 3567 1157 327 378 191

Y 190 3.96 2.44 0.88 0.37 -0.90 0.49 1.01

b.) use 90% confidence interval to estimate the average change in growth rate in % per year associated with a $1000 increase in expenditure. use a table or technology. round your answers to six decimal places.