In a test of a gender-selection technique, results consisted of 282 baby girls and 300 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? The probability that a girl will be born using this technique is approximately nothing. (Type an integer or decimal rounded to three decimal places as needed.)
In: Statistics and Probability
In (300+ words)
It is widely believed that testosterone levels play a
significant role in how violent a person may be. Because of this,
boys and girls are socialized in different manners.
Different cultures have dissimilar views on violence
and how it is tolerated in their societies.
What other factors (e.g., exposure to violence as a
child) influence the amount of violence that is seen in society?
Research and provide support for your views.
In: Psychology
You believe that requiring students to attend a series of presentations on study skills will improve their grades. You are concerned that boys and girls might react differently to such a series, and that students in grades 9 and 10 might react differently than those in grades 11 and 12. You set up an experiment involving 100 students in ninth and tenth grade and 100 students in eleventh and twelfth grade. (Assume there are equal numbers of girls and boys in each grade.) You intend to measure improvement based on pre- and post-treatment grade-point averages.
Describe the design of an experiment to help you determine if a set of presentations on study skills is effective in improving grades.
Answer:
Suppose you have 50 students and need to assign them to two groups of equal size. Describe a randomization procedure that would achieve this.
Answer:
Suppose you have 50 students and need to assign them to two independent groups. Describe a randomization procedure that would achieve this.
Answer:
Describe an appropriate method of analysis for the data you collect from this experiment.
Answer:
In: Statistics and Probability
You believe that requiring students to attend a series of presentations on study skills will improve their grades. You are concerned that boys and girls might react differently to such a series, and that students in grades 9 and 10 might react differently than those in grades 11 and 12. You set up an experiment involving 100 students in ninth and tenth grade and 100 students in eleventh and twelfth grade. (Assume there are equal numbers of girls and boys in each grade.) You intend to measure improvement based on pre- and post-treatment grade-point averages a.
a. Describe the design of an experiment to help you determine if a set of presentations on study skills is effective in improving grades.
b. Suppose you have 50 students and need to assign them to two groups of equal size. Describe a randomization procedure that would achieve this.
c. Suppose you have 50 students and need to assign them to two independent groups. Describe a randomization procedure that would achieve this.
d. Describe an appropriate method of analysis for the data you collect from this experiment.
In: Statistics and Probability
You believe that requiring students to attend a series of presentations on study skills will improve their grades. You are concerned that boys and girls might react differently to such a series, and that students in grades 9 and 10 might react differently than those in grades 11 and 12. You set up an experiment involving 100 students in ninth and tenth grade and 100 students in eleventh and twelfth grade. (Assume there are equal numbers of girls and boys in each grade.) You intend to measure improvement based on pre- and post-treatment grade-point averages a.
a. Describe the design of an experiment to help you determine if a set of presentations on study skills is effective in improving grades.
b. Suppose you have 50 students and need to assign them to two groups of equal size. Describe a randomization procedure that would achieve this.
c. Suppose you have 50 students and need to assign them to two independent groups. Describe a randomization procedure that would achieve this.
d. Describe an appropriate method of analysis for the data you collect from this experiment.
In: Statistics and Probability
Question 3: Suppose the height for girls is distributed normally with a mean (μ1) of 66 inches and a standard deviation of 3.5 inches. The height for boys is distributed normally with a mean (μ2) of 68 inches and a standard deviation of 4 inches.
a) Using R, simulate a sample of n1 = 50 boys and n2 = 50 girls and compute ?̅1 − ?̅2. Repeat 5,000 times. Plot the histogram of the sampling distribution of ?̅1 − ?̅2.
b) Estimate Var(?̅1 − ?̅2) based on the results of your simulation. Does this match the expected variance of ?̅1 − ?̅2?
c) Compute a 95% confidence interval for the difference of the means (μ1 - μ2). What percentage of the time does the 95% confidence interval contain the true difference in (μ1 - μ2) of -2? Assume unequal variances.
d) Compute a 95% confidence interval for the difference of the means (μ1 - μ2). What percentage of the time does the 95% confidence interval contain the true difference in (μ1 - μ2) of -2? Assume equal variances.
e) Compare your results in (c) and (d).
In: Statistics and Probability
What is the difference between a woman with 45, X and one with 46, XX given that in all of the cells of a 46, XX individual one X chromosome is inactivated anyway?
Girls with Turner's syndrome are a little shorter than average, have a thicker neck, usually can't have children and can be socially inept - they butt into conversations, misread body language, are insensitive to others' feelings… In essence they act a lot like boys. Why might this be? (Hint: where do boys get their X chromosome?)
Using the parental Meiotic Nondisjunction rates from the class powerpoint make an argument about the % of Turner’s individuals that are socially inept versus socially competent.
In: Biology
For this assignment, you will
(1) Find a chart showing the economic growth of an economy in long run.
(2) Briefly discuss the history of economic growth of that economy.
(3) Finally talk about the factors driving economic growth.
Please find below the sample assignment.
Hong Kong GDP per capita (1961 - 2018)
In general, we observed the rising trend of GDP per capita of Hong Kong from 1961 to 2018. Modern history of economic growth of Hong Kong can be broadly divided into 3 phases.
1940s to early 1990s - Rapid industrialization
industrialization accelerated after 1945 with the inflow of money from Mainland China. Immigrants from Mainland China developed textile industry of Hong Kong. Hong Kong’s industry was founded in the textile sector in the 1950s and gradually diversified to clothing, electronics, plastics and other labor-intensive production mainly for exports.
Textile sector was the prominent industry of Hong Kong in 1950s
Early 1990s to early 2000s – Surge in service sector and reintegration into Mainland China
Manufacturing moved out of Hong Kong during the 1980s and 1990s, there was a surge in the service sector. Hong Kong’s economy transformed from manufacturing to services. Furthermore, Hong Kong’s integration with the mainland accelerated and Hong Kong became the main provider of commercial and financial services. From 1978 to 1997, trades between Hong Kong and the PRC grew at an average rate of 28% per annum.
Handover of Hong Kong from UK to China in 1997. This highlights the integration of the economy of Hong Kong with Mainland China.
Early 2000s to 2010s - Deepened reliance on China
Over the recent 20 years, Hong Kong economy has transformed from enhanced integration with China to deepened reliance on China. The four key industries, including financial services, tourism, trading and logistics heavily depend on the businesses with Mainland China. Hong Kong can maintain its economic growth during the global financial crisis primarily due to the help from Mainland China.
Is the economy of Hong Kong nowadays too reliant on the help from Mainland China?
Key factors driving economic growth:
Institutions: Low taxes, lax employment laws, absence of government debt, and free trade are all pillars of the Hong Kong experience of economic development.
Education: The government also pursued an ambitious public education program. By 1966, 99.8% of school-age children were attending primary school, and free universal primary school was provided after 1971. Secondary school provision was expanded in the 1970s, and from 1978 the government offered compulsory free education for all children up to the age of 15.
In: Economics
At an early stage of clinical trials of a certain method of gender selection, 14 couples using that method gave birth to 13 boys and 1 girl. Complete parts (a) through (e) below.
a. Assuming that the method has no effect and boys and girls are equally likely, use the range rule of thumb to identify the limits separating values that are significantly low and those that are significantly high (for the number of boys in 14 births). Based on the results, is the result of 13 boys significantly high?
Significantly low values for the number of boys in 14 births are _____ and lower. Significantly high values for the number of boys in 14 births are ____ and higher. The result of 13 boys (is or is not?) significantly high. (Type integers or decimals rounded to one decimal place as needed.)
b. Find the probability of exactly 13 boys in 14 births, assuming that the method has no effect. _______ (Type an integer or decimal rounded to six decimal places as needed.)
c. Find the probability of 13 or more boys in 14 births, assuming that the method has no effect. _____ (Type an integer or decimal rounded to six decimal places as needed.)
d. Which probability is relevant for determining whether 13 boys is significantly high: the probability from part (b) or part (c)? Based on the relevant probability, is the result of 13 boys significantly high?
The probability from (Part C or Part B) is relevant for determining whether 13 boys is significantly high. Based on this probability, the result of 13 boys (is or is not) significantly high.
e. What do the results suggest about the effectiveness of this method of gender selection?
A. The results do not suggest anything about the effectiveness of this method of gender selection.
B. The results suggest that this method is not effective at transforming the distribution of genders to a binomial distribution.
C. The results suggest that this method is effective at transforming the distribution of genders to a binomial distribution. D. The results suggest that this method is not effective in increasing the likelihood that a baby is a boy.
E. The results suggest that this method is effective in increasing the likelihood that a baby is a boy.
In: Statistics and Probability
Ascaris nematodes shed their eggs in the feces of their hosts (including pets, farm animals, and humans). Behavioral observations on humans suggest that young boys eat dirt more frequently than young girls. Additionally data on public sanitations indicate that some parts of the southeastern United States lack public sanitation, thus the people of the area simply urinate and defecate outside.
Hypothesis
Prediction:
In: Biology