A manufacturer of washing machines claims that only 5% of the units it sells suffer failures during the chart year of no

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A Manufacturer Of Washing Machines Claims That Only 5 Of The Units It Sells Suffer Failures During The Chart Year Of No 1 (175.83 KiB) Viewed 82 times

A manufacturer of washing machines claims that only 5% of the units it sells suffer failures during the chart year of normal operation. A consumer organization has asked 20 families of equal number of members who have purchased these washers, who report any malfunction during the first year. At the end of this, only three families reported a malfunction. The consumer organization believes that the proportion of washing machines that will suffer a failure is higher than the manufacturer's stated value = (a) Use the previous exercise to show that HO: 0 = 0.05 can be rejected with a type I error size of 0.1. (b) Calculate the p-value for this problem and test the null hypothesis with respect to the alternative using this method