Statistics and Probability Answers

Suppose that 63.6% of brides are younger than their grooms. Suppose one were to consider simple random samples of size 36 of brides.
What is the probability that the proportion of brides in a sample of size 36 who are younger than their grooms exceeds 0.646?

1. In a rabbit family with four offspring, find the probability that there will be at least 1 male and 1 female in the offspring.
2. T he probability that a trap will catch a rodent is 0.4. what is the probability that out of 5 traps set within a certain forest, at least;(a) 1 will catch a rodent, (b) all will catch a rodent.
3. in a fishing region, if the two standard Norman point are identified as z1 and z2. what is the area under the standard normal curve between z1=0.81 and z2=1.94?
4. if 20% of patient being treated with a type of malaria drug suffered a bad reaction, find the probability in the treatment of 10 patients, 2 will suffer a bad reaction.
5. In measuring the height of some rabbit, the mean was 72, and the standard deviation was 15. calculate the standard height of rabbits having a height of 93.
6. If the probability of a defective syringe is 0.4. find the mean for the distribution of defective syringes in a total of 500.

In a certain rabbit farm in the southern part of Nigeria 25% of the rabbits breed are of the type bauscat, determine the probability that, out of 5 rabbits chosen at random 2 are of the type bauscat.

Suppose a box contains 4 red balls and 3 black balls. Compute the probability that the second ball drawn is red if the first ball drawn was black.

in a card game with my friend, I pay a certain amount of money each time I lose. i win $4 if I draw a jack or a queen and I win $5 if I draw a king or ace for an ordinary pack of 52 playing cards. if I draw other cards I lose. what should I pay so that we come out even? (that is if the game is fair).

Find the probability function corresponding to the random variable x when a coin is tossed twice: assuming that the coins is fair?

if we draw 7 cards from a standard 52 card deck, what is the probability that all 7 cards are hearts?

Suppose that a shop has N boxes of chocolates, which will expire in a week’s time. The chocolates are priced at $4 per box. The shop owner is wondering if he should offer a 25% discount and price these chocolates at $3 instead. The probability of selling D boxes of chocolates in a week depends on the price as follows: $4:
P(D=1) = 0.5 P(D=2) = 0.4 P(D=3) = 0.1 $3: P(D=1) = 0.25 P(D=2) = 0.25 P(D=3) = 0.5
Determine the values of N where the shop owner should price the chocolates at $4 and $3, respectively.

Refer again to the regression analysis for average attendance and games won by American League baseball teams in exercise 44. Write the equation of the regression line.

1. A pair of dice are tossed. What is the probability of getting a total of:
a. 5;
b. At most 4