The monthly rainfall for Adelaide and Sydney was recorded over the course of a year.Adelaide was found to have a mean monthly rainfall of 45.645.6 mm with a range of 6767 mm, while Sydney had a mean of 86.886.8 mm with a range of 5757 mm.Which city has more consistent rainfall throughout the year?

Weekly rainfall data was collected from thirty different locations across the south coast area. The weekly rainfall(in mm) at each site was:

This year, the following five cities received more than average rainfall: London, Budapest, Venice, Barcelona and Paris. Over the nation, the cities are spread over five distinct regions: the forest, the valley, the mountains, the coast and the desert. The amount of rainfall in these places is 12, 27, 32, 44 and 65 inches, respectively. The city in the forest received the greatest rain, while the city in the desert received the least. Venice is in the mountains; Barcelona got 44 inches of rain, which is less than London. Paris got less rain than Budapest, which got less rain than Venice. The coastal city got 27 inches of rain.

1. The daily rainfall for each day of a weekin a certain city is given in millimetres.Find the average rainfall during the week.9, 11, 8, 20, 10, 16, 12

“What is the predicted rainfall my garden will receive this Spring?” will be the question investigated.Below is the statistics for rainfall for each month of the years of 2014-2017. Use the data to explore therelationship between month and rainfall. This data was collected from the Perth Metro Weather station.Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec2014 0.2 0.0 7.4 24.6 152.6 93.6 151.2 107.0 77.0 37.0 23.8 0.02015 18.6 23.4 15.6 54.0 83.8 100.4 102.4 113.0 52.0 20.6 20.4 13.62016 15.2 0.6 16.8 68.2 112.0 109.4 139.6 123.2 68.8 37.4 14.4 10.22017 45.4 137.2 23.6 0.0 70.8 88.0 172.6 151.6 77.4 42.0 4.8 40.6Source: bom.gov.au,http://www.bom.gov.au/jsp/ncc/cdio/weatherData/av?p_nccObsCode=139&p_display_type=dataFile&p_startYear=&p_c=&p_stn_num=009225STATISTICAL INVESTIGATION PROCESS INVESTIGATION QUESTIONHow can I predict the rainfall at my house this September? DATA COLLECTION [1 mark]Explain why the data given in the table above is secondary data.Why would I expect the data collected from BOM to be accurate?Is there sufficient data for accurately answering the investigation question?Give 3 ways the selection of data be improved? DATA REPRESENTATION [1 mark]Represent this data using a suitable graph. Label the graph appropriately.

Based on a sample of 30 randomly selected years, a 90% confidence interval for the mean annual precipitation in one city isfrom 123.7 cm to 129.5 cmDetermine the margin of error involved in this confidence interval.