In Juneau Alaska the 30 year annual snowfall average is 86 7

Last updated: 3/6/2023

In Juneau Alaska the 30 year annual snowfall average is 86 7 inches with a standard deviation of 40 4 inches The last four years saw an average annual snowfall of 115 7 inches 62 9 inches 168 5 inches and 135 7 inches Hia performs a hypothesis test on this data to determine if the next 30 year norm will have a different average if the trend from the last four years continues She uses a significance level of 5 Which of the following is a conclusion that she may make O The z statistic is 1 44 so the null hypothesis cannot be rejected O The z statistic is 1 68 so the null hypothesis cannot be rejected O The z statistic is 1 85 so the null hypothesis should be rejected O The z statistic is 4 6 so the null hypothesis should be rejected