Question
Asked Jul 5, 2019
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A group of students decide to participate in a national strength test. Assume a normal distribution and the following population parameters for the test:

μ = 580 and σ2 = 72.5

How many students would you expect to get below 70?

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Expert Answer

Step 1

Given mean number of students participated in national strength test = 580
Standard deviation = 72.5

The Z score with respect to probability to its left 0.6985 i...

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0.01 0.04 0.06 0.08 0.0 0.02 0.03 0.05 0.07 0.09 0.5080 0.5120 0.5239 0.5279 0.5319 0.5359 0.0 0.5000 0.5040 0.5160 0.5199 0.5398 0.5438 0.5557 0.5596 0.5636 0.1 0.5478 0.5517 0.5675 0.5714 0.5753 0.6064 0.2 0.5793 0.5832 0.5871 0.5910 0.5948 0.5987 0.6026 0.6103 0.6141 0.6406 0.3 0.6179 0.6217 0.6255 0.6293 0.6331 0.6368 0.6443 0.6480 0.6517 0.6700 0.6591 0.6772 0.6879 0.4 0.6554 0.6628 0.6664 0.6736 0.6808 0.6844 0.69500.6985 0.7123 0.5 0.6915 0.7019 0.7054 0.7088 0.7157 0.7190 0.7224 0.7357 0.7389 0.7324 0.7422 0.7517 0.6 0.7257 0.7291 0.7454 0.7486 0.7549 0.7611 0.7 0.7580 0.7642 0.7673 0.7704 0.7734 0.7764 0.7794 0.7823 0.7852 0.7910 0.7995 0.8 0.7881 0.7939 0.7967 0.8023 0.8051 0.8078 0.8106 0.8133 0.8212 0.8340 0.9 0.8159 0.8186 0.8238 0.8264 0.8289 0.8315 0.8365 0.8389

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