According to an article in Newsweek, the natural ratio of girls to boys is 100:105. In China, the birth ratio is 100:114 (46.7% girls). Suppose you don't believe the reported figures of the percent of girls born in China. You conduct a study. In this study, you count the number of girls and boys born in 150 randomly chosen recent births. There are 64 girls and 86 boys born of the 150. Based on your study, do you believe that the percent of girls born in China is 46.7? Conduct a hypothesis test at the 5% level. Note: If you are using a Student's t-distribution for the problem, you may assume that the underlying population is normally distributed. (In general, you must first prove that assumption, though.)State the distribution to use for the test. (Round your standard deviation to four decimal places.) P' ~     What is the test statistic? (Round your answer to two decimal places.)      What is the p-value? (Round your answer to four decimal places.)

Q: A Pew Research study estimates that 803 million people live in poverty today, after the 2020 global…

A: It is given that 803,000,000 people live in poverty today, out of 7,754,000,000 people worldwide.

Q: Students at Neilson Middle School are asked if they prefer watching television or listening to the…

A: Given that, The total number of students at Neilson Middle School is 150. The number of students,…

Q: In 1945​, an organization surveyed 1100 adults and​ asked, "Are you a total abstainer​ from, or do…

A: Given α=0.05         n1=1100       (for recent survey)n2=1100       (for in 1945 survey) x1…

Q: According to statistics reported on CNbC, a surprising number of motor vehicles are notcovered by…

A: Solution: a. Let X be the number of vehicles were not covered by insurance and n be the sample…

Q: In 1950​, an organization surveyed 1100 adults and​ asked, "Are you a total abstainer​ from, or do…

A: Given data,   x1= 396                                                  x2= 319 n1=1100…

Q: We would like to know: "What percentage of college students read the college newspaper every day?"…

A: There are two ways to draw conclusion about a population.

Q: Among the people in the age class "18 - 24", what is the percentage of people who prefer "Soft…

A: Given that Number of people who prefer soft drinks and in the age class 18 - 24 = 90 Number of…

Q: (b) Has the proportion of adults who totally abstain from alcohol changed? Use the a = 0.10 level of…

A: Here it is given that , of the 1100 adults surveyed, 352 indicated that they were total abstainer.…

Q: Does this statement make sense or not? our study measured the birth weights and incidents of…

A: Here we want to Know that the given statement make sense or not.

Q: A sample selected from a population gave a sample proportion equal to 0.60.

A:

Q: Based on the Nielsen ratings, the local CBS affiliate claims its 11 p.m. newscast reaches 41% of the…

A: From the given information, The sample size is 100 viewers. Among 100 viewers, 36% indicated that…

Q: According to The Census Bureau, 60% of adults buy clothing online. a) How many adults did they…

A: Solution: a. From the given information, p=0.60 and E=0.03. The confidence level is 0.95.

Q: When 3,011 adults were surveyed in a Pew Research Center poll, 73% said that they use the internet.…

A: Given Information: n = 3011 ¾ of all adults use the internet (p)  = 75% = 0.75   = 73% = 0.73 Step…

Q: Here are the fuel efficiencies (in mpg) of 8 new cars. 45, 20, 45, 14, 34, 22, 18, 28 What is the…

A: Given information- We have given the data of the fuel efficiencies of 8 new cars (arranged in…

Q: In a shipment of 500 light bulbs, 25 of them were broken. What percentage of the light bulbs were…

A: Given ,  In a shipment of 500 light bulbs , 25 of them were broken . We have to find the  percentage…

Q: What is the estimate of the common population proportion?

A: To find: The estimate of common population proportion

Q: If a researcher measures two individuals on a ratio scale, then it is impossible to determine how…

A: Ratio scale is a form of quantitative variable measurement scale. Ratio scale makes it possible for…

Q: In 1945​, an organization surveyed 1100 adults and​ asked, "Are you a total abstainer​ from, or do…

A: In 1945 survey, among 1100 adults 407 indicate that they were total abstainers. The number of…

Q: Given that Germany has a death rate of 11.6 per 1000 and a population of 80,722,792, about how many…

A: The Germany has a death rate of 11.6 per 1000. That is 11.6%, and a population of 80,722,792.

Q: In 1945, an organization surveyed 1100 adults and asked, "Are you a total abstainer from, or do you…

A: Null and alternative hypotheses: The hypothesis which is tentatively fixed up under and tested for…

Q: What percentage of pets are Rabbits?

A:

Q: What percentage of the people who worked were males?

A: men women total work 15 23 80 not work 23 28 51 total 38 93 131 What percentage of the…

Q: Suppose that in a group of 800 women, the percentage who work is the same as in the sample here, how…

A: men women total work 15 23 80 not work 23 28 51 total 38 93 131

Q: Say that there are five populations, and we need to test for difference of population means.  If we…

A: Say that there are five populations, and we need to test for difference of population means. We test…

Q: In a comparison taste test of two juice drink 780 people preferred Cranberry Blast.Only 220 people…

A: In a comparison taste test of two juice drink 780 people preferred Cranberry Blast.Only 220 people…

Q: If in a village actually involved by anthrax, 70 per cent of the goats are attacked and pei cent…

A:

Q: A survey of Hoosiers found that 57% are Pacers fans, 44% are Colts fans, and 35% are Pacers fans but…

A: Let P= Pacer fans  C= Colt fans So, P(P)= 57% = 0.57  P(C)=44%=0.44 So, 57% - 35%=22%= 0.22 are…

Q: There are 1,000 students in a college. Out of 20,000 in the whole university, in a study 200 were…

A:

Q: In the study conducted by selecting 100 female and 100 male students in order to test the claim that…

A: given that  p- value=0.0228

Q: A sample of size 26 was gathered from high school seniors to estimate how many intended to attend…

A: Given that  Sample size (n) = 26 The proportion answering Yes (P) = 0.9 P = 0.9 ; Q=1-P = 1-0.9 =0.1…

Q: What percentage of people are men who like movies?

A:

Q: In 1941​, an organization surveyed 1100 adults and​ asked, "Are you a total abstainer​ from, or do…

A: In 1941​, an organization surveyed 1100 adults and​ asked, "Are you a total abstainer​ from, or do…

Q: The US population is 13% African American.  If you were to take a SRS of 500 Americans, above what…

A: Solution:From the given information, the proportion of African American is 0.13, random sample of…

Q: A state legislator wishes to survey residents of her district to see what proportion of the…

A: Answer:-  Given, Margin of error=7%=0.07 Confidence level=0.90 Let P=0.5 ( as we don't have sample…

Q: In a survey of 3121 people, 412 are under-vaccinated. What is the proportion of under-vaccinated…

A: Given data, Total no of people n=3121 No of people under vaccinated is x=412 What is the proportion…

Q: What proportion of the general population has an IQ of 70 or less?

A: It is an important part of statistics. It is widely used.

Q: A research report from an independent-measures study states that there are significant differences…

A: The degrees of freedoms are 2 and 36.

Q: Here are the fuel efficiencies (in mpg) of 15 new cars. 49, 35, 17, 21, 27, 23, 45, 50, 39, 51, 41,…

A:

Q: A population with a mean of 8 has a sum of 40. How many scores are in the population?

A:

Q: If 10 out of 30 students got 22.5, 15 got 40 and 5 got 80 in an exam, which is the weighted average…

A: Given information: Total number of students n=30 The scores achieved by the respective number of…

Q: If the proportion of Hs is .45 out of 200 flips, what is the p-value?

A: Solution-: Given : We find p-value=?

Q: In a pharmaceutical company, the proportion of injection bottles found defective were 0.2, 0.1, 0.8,…

A:

Q: If a person’s z score equals 1.61, what percentage of the observations are more extreme?

A:

Q: what percentage of the women did not work?

A: men women total work 15 23 80 not work 23 28 51 total 38 93 131 percentage of the women…

Q: In Ghana, all patients surviving a stroke are supposed to have their cholesterol levels measured…

A: (i) The hypotheses are; Null hypothesis: There is no association between an individual sex and the…

Q: With no preliminary estimate of the proportion known, how many young adults would you survey to…

A: It is given that margin of error (E) is 0.10 and the confidence level is 0.99.

Q: If the proportion of Hs is .45 out of 50 flips, what is the p-value? Round to three places.

A: We have given that Sample proportion =0.45 Sample size (n)=50 flips  Population proportion p=0.5…

Q: In a group of 50 children, 11 cannot swim. What percentage can swim?

A: Givenno.of children in a group=50no.of children cannot swim=11

Q: If the proportion of Hs is .25 out of 200 flips, what is the p-value? Round

A: Here proportion of head in fair coin should be 0.5 So take hypothesis with proportion p is 0.5 or…

Q: What percentage of people eat fruits and vegetables and abstain from smoking, but do not partake in…

A:

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.