Recent content by kulmser

Historical data shows that 4% of the components produced at a certain manufacturing facility are defective. A particularly harsh labor dispute has recently been concluded, and management is curious about whether it will result in any change in this figure of 4%. A random sample of 500 items...

Since it is np(1-p) Shouldnt it be Sqrt(np(1-p))/(n^0.5))? However the answer I got from the lecturer was as following. Sample standard error of xbar = [(0.51*0.49)/n]^0.5 How could this be?

Mr. Grumpy and Mr. Happy are both running for Governor. Mr. Grumpy will eventually win the election with 51 percent of the vote. A day before the election, a state-wide newspaper surveys 100 people about their choice for governor. Assume that survey respondents accurately report who they will...