# Question: The sex distribution of new babies is close to 50

The sex distribution of new babies is close to 50% each, with the percentage of males usually being just slightly higher. In China in recent years, the percentage of female births seems to have dropped, a combination of policy limiting family size, the desire of most families to have at least one male child, the possibility of determining sex well before birth, and the availability of abortion. Suppose that historically 49% of births in China were female but birth records in a particular town for the past year show 800 females born and 1200 males. Conduct an investigation to determine if the current probability of a female birth in this town is less than 0.49, by using the mean and standard deviation of the probability distribution of what you would observe with 2000 births if it were still 0.49

**View Solution:**## Answer to relevant Questions

Lake Wobegon Junior College admits students only if they score above 1200 on the sum of their critical reading, mathematics, and writing scores. Applicants from ethnic group A have a mean of 1500 and a standard deviation of ...Simulate an exit poll of 100 voters, using the Sampling Distributions applet on the text CD, assuming that the population proportion is 0.53. Refer to Activity 1 for guidance on using the applet. a. What sample proportion ...A roulette wheel in Las Vegas has 38 slots. If you bet a dollar on a particular number, youâ€™ll win $35 if the ball ends up in that slot and $0 otherwise. Roulette wheels are calibrated so that each outcome is equally ...According to the 2010 U.S. Census Bureau Current Population Survey (www.census.gov/population/www/socdemo/hh-fam/cps2010.html), the average number of people in family households which contain both family and non-family ...Suppose a baseball player has a 0.200 probability of getting a hit in each time at-bat. a. Describe the shape, mean, and standard deviation of the sampling distribution of the proportion of times the player gets a hit after ...Post your question