Just how accurate are the weather forecasts we hear every day? The table compares the daily forecast with a city’s actual weather for a year. Actual Complete parts a through d. Rain No Rain Forecast Rain No Rain 67 va 266 a) On what percent of days did it actually rain? | % (Round to one decimal place as needed.) b) On what percent of days was rain predicted? | % (Round to one decimal place as needed.) c) What percent of the time was the forecast correct? | % (Round to one decimal place as needed.) d) Do you see evidence of an association between the type of weather and the ability of forecasters to make an accurate prediction? Write a brief explanation, including an appropriate graph. On the charts below, the bars are RC for days when it actually rains that are correctly forecasted, R INC for days when it actually rains that are incorrectly forecasted, NR C for days when it actually does not rain that are correctly forecasted, and NR INC for days whe actually does not rain that are incorrectly forecasted. Which bar chart is appropriate for representing these data? 97.4% 78.1% 79.9% 72.8% 21.9% 20.1% 27.2% 2.6% RCR INC NRC NR INC RCR INC NRC NR INC Is there any evidence of association between the type of weather and the ability of forecasters to make an accurate prediction? O O No, because the accuracy rates for forecasting the different types of weather appear to be very close. Yes, because the percentage of accurate forecasts for not rainy days is much higher than the percentage of accurate forecasts for rainy days
