Before 1918, approximately 60% of the wolves in a region were male, and 40% were female. However, cattle ranchers in this area have made a determined effort to exterminate wolves. From 1918 to the present, approximately 70% of wolves in the region are male, and 30% are female. Biologists suspect that male wolves are more likely than females to return to an area where the population has been greatly reduced. (a) Before 1918, in a random sample of 9 wolves spotted in the region, what is the probability that 6 or more were male? What is the probability that 6 or more were female? What is the probability that fewer than 3 were female?

Q: 8. Three thousand fifty-nine cases of AIDS had been reported in Santa Clara County, CA, through a…

A: event   A : obtained disease through hetero sexual contact B : female   P(A) = 0.064 P(B) = 0.074…

Q: 1.The National Academy of Science reported that 45% of research in mathematics is published by US…

A:

Q: The Gallup website reported results from a recent poll of American teachers and asked if they…

A: Givenx=88sample size(n)=120significance level(α)=0.05

Q: A news article estimated that only 5% of those age 65 and older who prefer to watch the news, rather…

A: Solution: The population consisting of all adult Americans age 65 and older who prefer to watch…

Q: A random sample of 113 felons convicted of nonviolent crimes in a state prison system completed a…

A: Given , n= 113 , x = 58 Here One prop Z test is applicable

Q: In a previous poll, 38% of adults with children under the age of 18 reported that their family ate…

A: The test statistic is -1.36 and the P-value is 0.088.

Q: In a previous poll, 38% of adults with children under the age of 18 reported that their family ate…

A: Population proportion, p = 0.38Sample size, n = 1186Number of successes, x = 428Significance…

Q: Historically, the proportions of all Caucasians in the United States with blood phenotypes A, B, AB,…

A: a)   Consider that pi’s are the proportion of A, B, AB and O blood phenotypes for American…

Q: A city official claims that the proportion of all commuters who are in favor of an expanded public…

A: Objective: To test whether this sample proportion is different from 50% or not. Setting of…

Q: In a previous poll, 31% of adults with children under the age of 18 reported that their family ate…

A: Population proportion, p = 0.31Sample size, n = 1199Number of successes, x = 350Significance level,

Q: It is generally assumed that alcohol consumption tends to make drinkers more impulsive. However, a…

A: The data set contains : Column 1 : Group number  1 = Remainder sober 2 = Flavored drinks with not…

Q: Study 3: Two hundred people were randomly selected from a list of all people living in Minneapolis…

A: Part A: In an experiment we assign people or things to certain group and apply treatment to one of…

Q: A sample of 750 children treated for injuries sustained from motor vehicle accidents was obtained,…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

Q: A report summarizes a survey of people in two independent random samples. One sample consisted of…

A: For young adults, n1 = 700, p1^  =0.37 p1^ = x1/n1   x1= p1^*n1  =0.37*700  = 259  For parent of…

Q: In a previous poll, 41% of adults with children under the age of 18 reported that their family ate…

A: Solution-: Given: x=429,n=1105,P0=0.41,α=0.05 Is there sufficient evidence that the proportion of…

Q: The National Academy of Science reported that 31% of research in mathematics is published by US…

A: Given : Hypothesized proportion : p0=0.31 Claim : Proportion is different from 0.31 . Sample size :…

Q: i) Test, at the 3% level of significance, whether the proportion of adults who experience an adverse…

A: For sample 1, we have that the sample size is N1= 733 the number of favourable cases is X1= 103, so…

Q: with children under the age of 18 were selected at random, and 501 of those 1163 adults reported…

A: We have given that p = 45% = 0.45  n = 1163 x = 501 p̂ = x/n = 501/1163 = 0.4308 Significance level…

Q: In a study of the demand for life insurance, Executive Insurers, Inc., is examining the factors that…

A: Hello, thanks for posting your question here.  Since you have posted a question with multiple…

Q: Find the test statistic, Zo Zo = (Round to two decimal places as needed.)

A: It is given that 428 of those 1186 adults reported that their family ate dinner together seven…

Q: he manufacturer of a new racecar engine claims that the proportion of engine failures ue to…

A: Given that  Sample size n1=185 , n2=160 Favorable cases x1=16 , x2=7

Q: In a previous poll, 43% of adults with children under the age of 18 reported that their family ate…

A: Step 1: Determine the population proportion (p0).In the given scenario:The population proportion is…

Q: According to a​ report, 61.3​% of murders are committed with a firearm. ​(a) If 400 murders are…

A: (a) If 400 murders are randomly​ selected, how many would we expect to be committed with a​ Firearm?…

Q: Homechooling has become very popular in the United States, and many colleges try to attract students…

A: Hypothesis testing is conducted for the parameters of the population like population mean,…

Q: 1. A researcher expects that the number of people (18 years and older) who report binge drinking in…

A: The hypothesized value of population proportion is p=0.25 i.e., proportion of people binge drinking…

Q: The National Academy of Science reported that 31 % of research in mathematics is published by US…

A: p=0.31 n=188 x=74

Q: In a previous poll, 35% of adults with children under the age of 18 reported that their family ate…

A: Given information n = 1088, x = 361

Q: From the U.S. Census Bureau's American Community Survey in 2019 it was found that 33.13% of United…

A: Note: Hi there! Thank you for posting the question. As you have posted multiple questions, as per…

Q: In a previous poll, 35% of adults with children under the age of 18 reported that their family ate…

A:

Q: In a previous poll, 38% of adults with children under the age of 18 reported that their family ate…

A: It is given that 38% of adults with children under the age of 18 reported that their family ate…

Q: A local school board wants to estimate the difference in the proportion of households with…

A: Given that  Sample sizes n1=40  , n2=45 Favorable cases x1=40 , x2=25

Q: 4. According to a recent report, 40% of high school students participate in some kind of music…

A:

Q: A local school board wants to estimate the difference in the proportion of households with…

A: To construct the confidence interval about difference in two proportions, we must use z –…

Q: 2. Based on a poll of registered voters in a large city, 120 out of a random sample of 250 women…

A: Null hypothesis: There is no difference in the proportion who intended to vote for Trump among male…

Q: In a previous poll, 35% of adults with children under the age of 18 reported that their family ate…

A: The p-value in hypothesis testing is the probability of obtaining a test statistic value at least…

Q: A local bus company is planning a new route to serve four housing subdivisions. Random samples of…

A: Let, X1:subdivision 1 X2:subdivision 2 X3:subdivision 3 X4:subdivision 4 Therefore, Given, n=40 for…

Q: 2. The drug Ritalin is designed to stimulate the central nervous system. In a random sample of 242…

A: Given Information: Sample size n=242 Number of successes x=68 Hypothesized value of population…

Q: A report describes a survey of 500 licensed drivers. Each driver in the sample was asked if they…

A: sample size (n) = 500Want to test if there is convincing evidence that fewer than 50% of licensed…

Q: Response to alarm call Enter or Stand up or run to burrow freeze Totals Days since weaning 1-5 21 18…

A: For performing the chi-square test, state the null and the alternative hypothesis: H0: The…

Q: According to the National Institute on Alcohol Abuse and Alcoholism (NIAAA), and the National…

A: As per honor code, we will only answer first three questions: Given information: P=0.37n=364x=136 A)…

Q: 3. Researchers Regine Dilla and associates wanted to determine whether consumption of cola is…

A: Introduction: It is required to explain the reason this is a cohort study, and to identify the…

Q: A. Headache Pain : There are many over-the-counter pain relievers. By the end of the semester, you…

A: Given: Placebo Drug A Drug B Drug C 70 30 10 10 30 60 40 20 50 40 10 10 60 30 10 10 40…

Q: re looking for the most effective pain relie lacebo to see which work best. You use on eadache to go…

A: Independent variable: Type of Drug and placebo Dependent variable: Amount of time take pain relief…

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.