The amount of water consumed each day by a healthy adult follows a normal distri

Question

The amount of water consumed each day by a healthy adult follows a normal distribution with a mean of 1.54 liters. A sample of 10 adults after the campaign shows the following consumption in liters: 1.35 1.68 1.76 2.00 1.84 1.84 1.50 1.82 1.86 1.60 At the 0.05 significance level, can we conclude that water consumption has increased? Calculate and interpret the p-value. (b) State the decision rule for .05 significance level. (Round your answer to 3 decimal places.) (c) Compute the value of the test statistic. (Round your intermediate and final answer to 3 decimal places.)

Explanation / Answer

mean= 1.72 sd=.194 t=(1.72-1.54)/(.194/sqrt(10))= 2.93 t(.05,10)=1.812 water consumption has increased

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