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Q1) Weights for students applying to Sumo wrestling school are normally distributed, with mean of 250 pounds and standard deviation of 25 pounds. To be qualified to enter, a person should weight in top 15%. Determine the lowest weight a student can have and still be qualified to enter the school

a) 224

b) 275

c) 226

d) 280

e) 276

Q2) Manufacturer of steel wishes to test effect of method of manufacture on tensile strength of a particular type of steel. 4 different methods have been tested and data shown in Table. Test significance of the effect at α = 0.05

Methods Tensile Strength

1	2650	2765	2750	2600
2	2985	2975	2865	2890
3	2775	2620	2690	2700
4	2900	2885	2850	2950

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Statistics and Probability, Statistics

Category:- Statistics and Probability
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