The concentrations of particulate matter of diameter 2.5 micrometers or smaller (known as PM2. particles) were recorded for 5 randomly selected major cities before and during the Covid-19 lockdowns. The results are summarized below (in micrograms per cubic meter). Pollution Rates in Major Cities Before and During 2020 Pandemic Lockdown Beijing (march) Delhi (april) London (april) Las Vegas (april) San Paulo (april) Pre-lockdown 112.5 156.3 71.3 19.3 52.3 During lockdown 93.8 112.5 55.3 18.8 48.3 Use a 95% confidence level to test the claim that pollution levels of PM2.5 were reduced during Covid-19 lockdowns. You may assume this sample comes from a population that is normally distributed. *let the sample of scores before lockdown be sample 1* For the null and alternative hypothesis you may write words, don't spend a ton of time on symbols. The null hypothesis is The alternative hypothesis is If you use tables please complete the critical value and test statistic section, if you use a TI-84, please complete the p-value and alpha section. Leave the other sections blank. Critical value or values are If there is more than one answer, write them from smallest to largest and separate answers with a comma. Round to 2 decimal places. The test statistic is Round to 2 decimal places. OR The p-value is Round to 4 decimal places. The alpha value is Round to 2 decimal places. Do you REJECT or FAIL TO REJECT the null hypothesis