he percentage of males 18 years and older who have never married is 30.4. For females, the percentage is 23.6. Looking at the records in a particular populous county, a random sample of 250 men showed that 89 had never married and 50 of 200 women had never married. At the 0.01 level of significance, is the proportion of men greater than the proportion of women? Use the P-value method and let p1 be the proportion of men.

Q: A local college recently made the news by offering foreign language-speaking dorms to its students.…

A: Given observed frequency(O) table : Expected frequencies and Test statistics can be calculated as…

Q: One sample of scores has a mean of M = 45 and a sample size of n = 10 scores.  A second sample of…

A:

Q: You would like to conduct a survey to estimate the proportion p of consumers who like a new brand of…

A:

Q: The proportion of defective items is not allowed to be over 12%.  A buyer wants to test whether the…

A: Shzhzjzhxvmb

Q: Use the p-value you found to answer the following: Does this provide evidence that the risk of…

A: Step 1: Null and Alternative Hypothesis Claim : Some people believe that an increase in the…

Q: Claim: Fewer than 93 ​% of adults have a cell phone. In a reputable poll of 1162   ​adults, 85 ​%…

A: Given information- Population proportion, p = 0.93 Sample size, n = 1162 Sample proportion is- We…

Q: Determine the sample proportion. It has been determined with 95% confidence that the proportion of…

A:

Q: Proctor & Gamble claims that at least half the bars of Ivory soap they produce are 99.44% pure (or…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: Claim: Most adults would erase all of their personal information online if they could. A software…

A: It is given that:

Q: The racial distribution for the state of Texas is shown below.   Race White Hispanic Black Other…

A: Given - H0:  The racial distribution at my college is the same as the racial distribution for the…

Q: The proportion of students at a large high school who live within five miles of the school is p =…

A: Given: Proportion of students who live within five miles of the school, p=0.19 Sample size, n=17

Q: Are our kids getting taller? The average height of kindergartners in 1950 was 39.5 in. The data…

A: From the given information, The average height of kindergartens in 1950 was 39.5. The sample data is…

Q: We know that teenagers (ages 12 to 17) are much more likely to use instant messaging online than…

A: Solution: Given  n1=981 Sample size of teens n2=1217 sample size of adults.x1=736 teens used instant…

Q: ​Claim: Fewer than 92​% of adults have a cell phone. In a reputable poll of 1172 adults, 86​% said…

A: The hypotheses for the test are given below. Null hypothesis: H0: p = 0.92 Alternative hypothesis:…

Q: In a recent year, the Better Business Bureau settled 75% of complaints they received. (Source: USA…

A: According to central limit theorem, if the sample size n is large enough such that np≥15 and…

Q: Mother smoking Infant colic Yes No Total status Yes 15 167 182 No 111 2477 2588 Total 126 2644 2770

A: The given data is as follows:Mother smoking statusInfant…

Q: A veterinarian is interested in the habits of the dogs who come in. He wants to estimate what…

A: The objective of the question is to conduct various statistical tests and intervals based on the…

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: Solution

Q: In a test for equality of two proportions, the sample proportions were p1 = 32/60 and p2 = 20/60.…

A: p1 = 32/60 and p2 = 20/60. n1=60 ,n2=60

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A:

Q: Use the data below to test the claim that the weight loss was greater with the low fat diet compared…

A:

Q: Harley Davidson motorcycles make up 13% of all the motorcycles registered in the United States.You…

A: Approximate distribution is normal

Q: What is the standard error of the sample proportion of people that like a product if you have a…

A:

Q: A city has 4 voting districts. Records from previous years show the proportion of registered voters…

A: The chi square χ2 test statistic is used to compare the proportions among the two (or) more…

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: Given,margin of error(E)=0.025Assume sample proportion(p^)=0.5α=1-0.90=0.1α2=0.05Z0.05=1.645   (from…

Q: A study was conducted to determine the proportion of people who dream in black and white instead of…

A: (b) Obtain the 98% confidence interval for the difference between two proportions. The 98%…

Q: 2: The median age of the children is: 29 30.5 28.5 28

A: Given ages are, 36,42,18,32,22,22,25,29,30,31,19,24,35,29,26,36,24,28   Sort the data in Ascending…

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A:

Q: You want to compare the average working time of customer service from two companies. 9…

A: Two proportion z test used for camaring two proportion Two sample t test used to. campare the…

Q: ​Claim: Fewer than 91​% of adults have a cell phone. In a reputable poll of 1119 adults, 83​% said…

A:

Q: A nationwide study indicated that 80% of college students with the cellphone send and received text…

A: Concept of sampling distribution of sample proportion: Let a particular characteristic of a…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.