Question: **NO PAPER EXPLANATION PLEASE. IMAGE DOES NOT LOAD SOMETIMES** 1. A car dealership claims that its average service time is less than 7 hours on

**NO PAPER EXPLANATION PLEASE. IMAGE DOES NOT LOAD SOMETIMES**

1. A car dealership claims that its average service time is less than 7 hours on weekdays. A random sample of 16 service times was recorded and yielded the statistics =6.75 hours and s= 1.62 hours. Assume service times are normally distributed, is there enough evidence to support the dealership's claim at 5% significance level?

Hypotheses:

Rejection Region:

Test Statistic:

Decision/Conclusion:

2.A certain factory consumes on average 1000 litres of water per day with a variance (2) of 625 litres2. A random sample of 100 days taken revealed a mean daily consumption of = 1006 litres. At = 0.01, test if the mean daily water intake remains 1000 litres against the alternative that the mean water consumption has changed.

Hypotheses:

Rejection Region:

Test Statistic:

Decision/Conclusion:

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