(1 point) (a) Find the size of each of two samples (assume that they are of equal size) needed to estimate the difference between the proportions of boys and girls under 10 years old who are afraid of spiders. Assume the "worst case" scenario for the value of both sample proportions. We want a 99% confidence level and for the error to be smaller than 0.08.

Answer:

(b) Again find the sample size required, as in part (a), but with the knowledge that a similar student last year found that the proportion of boys afraid of spiders is 0.7 and the proportion of girls afraid of spiders was 0.69.

Answer:

(1 point) (a) Find the size of each of two samples (assume that they are of equal size) needed to estimate the difference between the proportions of boys and girls under 10 years old who are afraid of spiders. Use the conservative estimate for the value of both sample proportions. We want a 9696% confidence level and for the error to be smaller than 0.05.0.05.

Answer:

(b) Again find the sample size required, as in part (a), but with the knowledge that a similar student last year found that the proportion of boys afraid of spiders is 0.64 and the proportion of girls afraid of spiders was 0.83.

Answer:

Describe historical as well as current perspectives on the period of adolescence.

Discuss the changes that accompany puberty for both girls and boys, and describe the secular trend.

Discuss the implications of early maturation for girls and boys.

Describe the major changes seen in adolescent brains and how that affects behavior.

Describe sexually transmitted infections, and discuss the implications of providing students with condoms.

Discuss the leading causes of death in adolescence.

Describe adolescent nutritional needs and weight problems.

Explain the most prominent eating disorders as well as gender differences in their occurrence.

Describe substance use and abuse in adolescence.

(1 point)

(a) Find the size of each of two samples (assume that they are of equal size) needed to estimate the difference between the proportions of boys and girls under 10 years old who are afraid of spiders. Assume the "worst case" scenario for the value of both sample proportions. We want a 99% confidence level and for the error to be smaller than 0.02. Answer:

(b) Again find the sample size required, as in part (a), but with the knowledge that a similar student last year found that the proportion of boys afraid of spiders is 0.51 and the proportion of girls afraid of spiders was 0.82. Answe

Suppose that the birth rates in two hospitals (one rural and one urban) in one week were compared. Would you expect there to be a difference between the percentage of boys and girls born in the two hospitals? Why or why not? In which hospital would it be more likely for the birth rate of boys to be 70%? explain

Q1) Suppose you are a farmworker couple, recently married, living in Pakistan. In a good year, you might make $600. Infant mortality rates are high—your children will have a one in ten chance of dying during their first year. The likelihood of your children attending more than a couple of years of school is also very small. Nationwide, only 38% of boys and 27% of girls attend primary school, and you are among the least likely to have access to such services. Systems of public welfare, “social security” retirement pensions, and public health care are very limited.

a) What are the economic benefits and costs to you, the parent, of having children?

b) On strictly economic terms, would you prefer to have two babies or five?

If a couple has six boys and six girls, how many gender sequences are possible?
(Also, is there a way to do this with a T-83 plus calculator?)

To study whether or not handedness (being left or right handed) is affected by gender, 65 people were sampled. A contingency table is presented below:

Gender/Handedness
Right Left Total
Boys 21 8 29
Girls 24 12 36
Total 45 20 65

a) We wish to test the null hypothesis that the percentage of right-handed boys is the same as the percentage of right-handed girls. Test this hypothesis with a chi-square test using α = 0.05. (Don’t forget to state the null and alternative hypotheses. Don’t forget to write a conclusion.) b) Again test the

Code is only reading the last line from the text files. How would I resolve? This is for the Name Search problem in Starting out with Python book. def main(): #open a file for reading infile = open('GirlNames.txt' , 'r') #Read the contents into a list Girls = infile.readlines() #open another file for reading infile = open('BoyNames.txt', 'r') #Read the contents into a lits Boys = infile.readlines() #Get a name to search for Name = input('Enter a name: ') #Determine if name is in list if Name in Girls or Name in Boys: print( Name, "is one of the popular names.") else: print(Name, "was not found in the list.") main()