Automobile racing, high-performance driving schools, and driver education programs run by automobile clubs continue to grow in popularity. All these activities require the participant to wear a helmet that is certified by the Snell Memorial Foundation, a not-for-profit organization dedicated to research, education, testing, and development of helmet safety standards. Snell "SA" (Sports Application)-rated professional helmets are designed for auto racing and provide extreme impact resistance and high fire protection. One of the key factors in selecting a helmet is weight, since lower weight helmets tend to olace less stress on the neck. Suppose the following data show the weight and price for 18 SA helmets. (a) Develop a scatter diagram with weight as the independent variahlo (b) Does there appear to be any relationship between these two variables? There appears to be a negative linear relationship between weight (oz) and price ($). There appears to be no noticeable relationship between weight (oz) and price (\$). There appears to be a positive linear relationship between weight (oz) and price (\$). slope to two decimal places.) y^ (d) Test for the significance of the relationship at the 0.05 level of significance. (Use the F test.) State the null and alternative hypotheses. H0:0=0 H0:10Ha:1