MyBank regularly conducts job advertisement surveys in Australia. The average numbers of MyBank?s online newspaper job advertisements per week in Australian states and territories in July 2019 and July 2020 are given in the following table. Test the hypothesis that the number of online newspaper job advertisements in Australia did not change significantly during this period. Use ? = 0.01 and assume the differences are normally distributed.

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State/territory July 2019 July 2020 New South Wales 1256 1202 Victoria 535 397 Queensland 446 375 South Australia 470 194 Western Australia 711 739 Tasmania 207 206 ACT 202 132 Northern Territory 349 502