In a test of a sex-selection technique, results consisted of 263 female babies and 7 male babies. Based on this result, what is the probability of a female being born to a couple using this technique? Does it appear that the technique is effective in increasing the likelihood that a baby will be a female

In a test of a sex-selection technique, results consisted of 263 female babies and 7 male babies. Based on this result, what is the probability of a female being born to a couple using this technique? Does it appear that the technique is effective in increasing the likelihood that a baby will be a female

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

See similar textbooks

Similar questions

For a particular species of wolf, 48% are female, 30% hunt in medium-sized packs, and 10% are both female and hunt in medium-sized packs What is the probability of selecting a wolf that is female, given that it hunts in a mediumsized pack?
A company did a study of available vacation time for their staff employees over the past years. They determined the probability a staff employee selected at random has 2 weeks’ vacation was 45%, 1 week vacation 10%, 3 weeks’ vacation 20%, and more than 3 weeks’ vacation was 25%. The company randomly selects 20 employees. What is the probability that out of the 20 selected, at least 2 workers have 1 week vacation time?
Suppose a certain breed of piglets have a sex-ratio of 0.54 (that is the probability of male piglets). If 5 piglets were born, what is the probability that 3 of them are male?
A survey showed that 7575% of adults need correction (eyeglasses, contacts, surgery, etc.) for their eyesight. If 2222 adults are randomly selected, find the probability that no more thanno more than 11 of them need correction for their eyesight. Is 11 a significantly lowlow number of adults requiring eyesight correction?
One light bulb is selected at random from a lot of 140 light bulbs, of which 5% are defective. What is the probability that the light bulb selected is defective?
In a study of 349,212 cell phone users, it was found that 26 developed cancer of the brain or nervous system. Assuming that cell phones have no effect, there is a 0.000109 probability of a person developing cancer of the brain or nervous system. We therefore expect about 39 cases of such cancer in a group of 349,212 people. Estimate the probability of 26 or fewer cases of such cancer in a group of 349,212 people. What do these results suggest about media reports that cell phones cause cancer of the brain or nervous system? (a) P(xs 26) = (Round to four decimal places as needed.) (b) What does the result from part (a) suggest about the media reports? O A. The media reports appear to be correct because one would expect that more than 26 cell phone users would develop cancer and the study offers significant evidence to support this. B. The media reports appear to be incorrect because one would expect that more than 39 cell phone users would develop cancer. In fact, the study may offer…
In a study of 308,183 cell phone? users, it was found that 30 developed cancer of the brain or nervous system. Assuming that cell phones have no? effect, there is a 0.000138 probability of a person developing cancer of the brain or nervous system. We therefore expect about 43 cases of such cancer in a group of 308,183 people. Estimate the probability of 30 or fewer cases of such cancer in a group of 308,183 people. What do these results suggest about media reports that cell phones cause cancer of the brain or nervous system? P(x less than or equal 30)=
A poll conducted on the proposed bonus plan for employees indicated that 40% of all female employees and 65% of all night-shift employees supported the plan. Also, 34% of all employees are women, 51% of all employees are night-shift workers, and 24% are day-shift females. If two employees are randomly selected, what is the probability that the first, a male is a night-shift worker and the second, a female is a day-shift worker? Answer:
In a test of a gender-selection technique, results consisted of 294 baby girls and 272 baby boys. Based on this result, what is the probability of a girl born to a couple using this technique? Does it appear that the technique is effective in increasing the likelihood that a baby will be a girl?
In a study of 235,722 cell phone users, it was found that 109 developed cancer of the brain or nervous system. Assuming that cell phones have no effect, there is a 0.000477 probability of a person developing cancer of the brain or nervous system. We therefore expect about 113 cases of such cancer in a group of 235,722 people. Estimate the probability of 109 or fewer cases of such cancer in a group of 235,722 people. What do these results suggest about media reports that cell phones cause cancer of the brain or nervous system? (a) P(x ≤ 109) = (Round to four decimal places as needed.)
An accounting firm has found that 8 out of 12 companies audited contain minor errors in their books. What is the probability that rd the 3 company audited contained the 1 minor error found.