Question

Question 4 (1 point) ✓ Saved Forty percent of all registered voters in a national election are female. A random sample of 5 voters is selected. The probability that the sample contains 2 female voters is 0 0.0778 O 0.7780 O 0.5000 0.3456 Question 5 (1 point) ✓ Saved A sample of 2,500 people was asked how many cups of coffee they drink in the morning. You are given the following sample information. Cups of Coffee Frequency. 700 900 600 300 2,500

Answer 1

Solution : Q. 4. We have 40% of all registered Voters in a national election are female. A random sample of 5 voters! is selected. Let X X: Noters in national election is female Here ere nr 5, no P-0.40 Thus, X . Binomical (P=0.40) and we want to find out the probability P (X=2). XCO,1,2,...,n. P(x=x) = () pacl-P)", X2031,2,..., n. 1.. P[X=2] = C) (0-40°C)-0.409 - JOXO 16 X 0.216 - 0.3 4 5 6 P[X=2] = 0.3456 Thus, contains the probubility that the sample 2 females voters is 0.3 456.