Statistics and Probability Answers

Consider the composition of a 3-child family in which the children were born at different times but a girl is as likely as a boy at each birth. What is the probability that the oldest child and the youngest child are of the same gender

There are 250 dogs at a dog show that weigh an average of 12 pounds,with a standard deviation of 8 pounds.if 4 dogs are chosen at random what is the probability that the average weight is greater than 8 pounds?

Consider the composition of a 3-child family in which the children were born at different times but a girl is as likely as a boy at each birth. What is the probability that the oldest child and the youngest child are of the same gender?

The graduate record exam is standardized test recquired to be admitted to many graduate schools in the United States. A high score in GRE makes admissions more likely. According th the educational testing service, the mean score for takers of GRE who do not have training courses is 555 with standard deviation of 139. Brain Philippine offers expensive GRE training courses, claiming their graduates score better than those who have not talen any training courses. To test the company's claim, a statisticiam randomly selected 30 graduates of BP and asked their GRE scores. 

Suppose the desicion rule is “Reject Ho if the mean score of the sample d BP graduates is greater than 590 otherwise, accept Ho". Compute for the level of significance for this test. Also, find the risk of concluding that the BP graduates did not score better than 555 when in fact the mean score is 600. Use 95% confidence level.

If the degree of freedom is 20, what is the 96th percentile of t-distribution

The proportion of eligible voters in the next corporation election (in tumkur) who will vote for the incumbent is assumed to be 55%. What is the probability that in a random sample of 500 voters less than 49% say they will vote for the incumbent? Write your conclusion.

The weight 250 senior high school average 60 kg and the standard deviation is 6 kg how many children weigh between 50 kg and 75 kg

The probabilities that the costumer will buy 1,2,3,4,5 items in a grocery store are 1/6,1/6,1/6,2,/6,1/6 respectively. what is the average number of item that

a costumer will buy?

Monthly income of the families is continuous or discrete and explain with supporting your answer

The average time it takes a group of college students to a certain examination is 57.3 minutes . The standard deviation is 9 minutes . Assume that the variable is normally distributed. What is the Probability that a randomly selected college student will complete the examination in less than 54 minutes