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: 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

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Q: A random sample of n1 = 10 regions in New England gave the following violent crime rates (per…

A:

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…

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A: Given information Percentage of students taking distance learning class = 12% Percentage of…

Q: An anger-management course claims that, after completing its seminar, participants will lose their…

A: (1)

Q: A random sample of n1 = 10 regions in New England gave the following violent crime rates (per…

A: Let μ1 denote mean violent crime rate in New England and μ2 denote the mean violent crime rate in…

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

A: Given Information: Hypothesized value of population proportion is p0=41%=0.41 Sample size (n) = 462…

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,

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

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A:

Q: An anger-management course claims that, after completing its seminar, participants will lose their…

A:

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: A random sample of 10 regions in New England gave the following violent crime rates (per million…

A: Given Let X1 and X2 represent  a random sample of 10 regions in New England and 12 regions in the…

Q: In 2016, the New York Times reported that the average American spent 50 minutes per day on Facebook,…

A: From the given information, AverageFacebook=50 Average reading, exercising, or actually socializing…

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

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A: Population proportion is p=0.095 . Sample size is n=75 .

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A: The sample size n is 25.

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A: Given Information: Sample size n=2253 Sample proportion p^=0.19

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Q: In statistical surveys where individuals are randomly chosen and asked​ questions, experience has…

A: From the above given data the following solution is provided below:

Q: According to the National Institute on Alcohol Abuse and Alcoholism, and the National Institutes of…

A: From the provided information, Sample size (n) = 462 From which 166 admitted to having engaged in…

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Q: A random sample of n₁ = 10 regions in New England gave the following violent crime rates (per…

A: Sample sizes:x1x23.33.53.74.344.73.95.53.33.34.14.81.83.54.82.42.93.13.13.55.22.8

Q: x1:   New England Crime Rate 3.3 3.7 4.0 3.9 3.3 4.1 1.8 4.8 2.9 3.1 Another random sample of n2 =…

A: Given that, x1:   New England Crime Rate 3.3 3.7 4.0 3.9 3.3 4.1 1.8 4.8 2.9…

Q: random sample of n1 = 10 regions in New England gave the following violent crime rates (per million…

A: We have used the excel data analysis tool to run the regression analysis.

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A: Given information n = 1088, x = 361

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A: Null Hypothesis:   H0: All expected proportion of the number of children in certain family units…

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…

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A:

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: Fishing: Northern Pike Athabasca Fishing Lodge is located on Lake Athabasca in northern Canada. In…

A: The hypothesized proportion value is 0.75.

Q: A random sample of n1 = 10 regions in New England gave the following violent crime rates (per…

A: Introduction: Assume that the crime rate in Region NE and Region RM are independent. Further, the…

Q: A random sample of n1 = 10 regions in New England gave the following violent crime rates (per…

A: given, n1=10, n2=12 where n1 is the violent crime rate in New England Crime rate x1 =…

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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.