A grassroots group opposed to a proposed increase in the gas tax claimed that the increase would hurt working-class people the most, since they commute the farthest to work. Suppose that the group randomly surveyed 24 individuals and asked them their daily one-way commuting mileage. The results are in Table below. Using a 5% significance level, test the hypothesis that the three mean commuting mileages are the same. working-class professional (middle incomes) professional (wealthy) 17.8 16.5 8.5 26.7 17.4 6.3 49.4 22.0 4.6 9.4 7.4 12.6 65.4 9.4 11.0 47.1 2.1 28.6 19.5 6.4 15.4 51.2 13.9 9.3

Q: A toy company claims that their building blocks have a certain color distribution, shown below. Use…

A: The claim is building block has a certain color distribution. The hypothesis is, H0: The proportion…

Q: A polling company contends that an agent conducts a mean of 53 in-depth home surveys every week. A…

A:

Q: In a certain school district, it was observed that 35% of the students in the element schools were…

A: Solution

Q: Twenty years ago, 53% of parents of children in high school felt it was a serious problem that high…

A:

Q: Compute the value of the test statistic. Round your answer to two decimal places.

A:

Q: Radio Shack reported that they sell 21% of all home computers. a) Is this claim supported at the 1%…

A: GivenNo. of computers (n)=700x=120p^=120700=0.171α=0.01

Q: Test the claim that the proportion of men who own cats is larger than 50% at the .025 significance…

A: Given that  Claim :  The proportion of men who owns cats is larger than 50%  Hypothesized proportion…

Q: A random sample of n1 = 148 people ages 16 to 19 were taken from the island of Oahu, Hawaii, and 14…

A: a) The level of significance, denoted by α, is defined as the probability of incorrectly rejecting…

Q: A study considered whether greater levels of television watching by teenagers were associated with a…

A: The z test are used to measure the mean significance between the two sample. It is used when the…

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

A:

Q: In another Harris poll, adults were asked if they are in favor of abolishing the penny. Among 200…

A: From the given information,                        Sample size (n) =200 Probability of success…

Q: he Wall Street Journal Corporate Perceptions Study 2011 surveyed readers and asked how each rated…

A: Given data is: Quality of Management Reputation of Company   Excellent Good Fair Excellent 40…

Q: In a recent Gallup poll, 507 adults age 18 and older were surveyed and 269 said they believed they…

A:

Q: Listed below are the heights (inches) for the simple random sample of supermodels Lima, Bundchen,…

A: Given,sample size(n)=10sample mean(x¯)=69.825standard deviation(s)=0.7997α=0.01

Q: 1. A Pew Poll taken in 2010 surveyed 830 randomly selected people ages 18 – 29, and found that 166…

A:

Q: Many people believe that criminals who plead guilty tend to get lighter sentences than those who are…

A: The null hypothesis for testing is defined as, H0: The sentence (sent to prison or not sent to…

Q: A student wants to see if the number of times a book has been checked out of the library in the past…

A: The given table represents the number of times a book checked out of the library and the number of…

Q: A student wants to see if the number of times a book has been checked out of the library in the past…

A: As given, the" number of times checked out " will be a predictor of the " number of pages ".…

Q: Twenty years ago, 54% of parents of children in high school felt it was a serious problem that high…

A:

Q: Twenty years ago, 57% of parents of children in high school felt it was a serious problem that high…

A: The single proportion  binomial test is used to compare a proportion of responses or values in a…

Q: In a certain school district, it was observed that 25% of the students in the element schools were…

A: Since you have posted question with multiple subparts, we will solved first three subparts for you.…

Q: Can you reject the claim that the proportion of 18 to 24-year-olds living in their parents' homes…

A: Given that  Sample sizes n1=248 , n2=244 Sample proportion p1^=0.515 , p2^=0.412

Q: The owner of Beach Front Snow Cones Inc. believes the median number of snow cones sold per day…

A: Let M denotes the median. The test is that it is reasonable to conclude that the median is actually…

Q: Test the claim that the proportion of men who own cats is significantly different than 40% at the…

A: Given that  Claim : The proportion of men who owns cats is significantly different than 40%…

Q: For Americans using library services, the American Library Association claims that at most 70% of…

A: Here, One sample Z test is applicable. x = 85 , n = 100

Q: The American Library Association claims that at most 67% of library patrons actually borrow books.…

A:

Q: A health psychologist was interested in people's weight-reduction strategies. Of the 56 participants…

A: The degrees of freedom is, The degrees of freedom is 3. The significance level is 0.05. The…

Q: The Township Board of Meridian Township wants to know how much public support there is for rezoning…

A: 1. Assume that p is the true proportion of Township residents, who are in favor of the rezoning…

Q: A university dean is interested in determining the proportion of students who receive some sort of…

A:

Q: For a certain year, a study reports that the percentage of college students using credit cards was…

A:

Q: Twenty years ago, 54% of parents of children in high school felt it was a serious problem that high…

A: Given n=850 P0=0.54 so n*P0(1-P0) = 850*0.54*(1-0.54) =211.1

Q: Twenty years ago, 54% of parents of children in high school felt it was a serious problem that high…

A:

Q: 2. For Americans using library services, the American Library Association claims that at most 70% of…

A: Given: The random sample of patrons selected are n=100. The number of patrons who borrowed books are…

Q: Rachel, a city employee, would like to make the claim that the average amount that residents spend…

A: Q1)  |Test - stats| < Critical value    P-value = P( Z < -0.52)

Q: Espaí A nationwide job recruiting firm wants to compare the annual incomes for childcare workers in…

A:

Q: A 2018 General Social Survey asked "Do you/Does your family own your home/apartment, pay rent, or…

A: Note: Hey, since there are multiple subparts posted, we will answer first three subparts. If you…

Q: Is the proportion of wildfires caused by humans in the south different from the proportion of…

A: Given : x1= 350.0 n1= 519 x2= 383.0 n2= 500 significance level, 0.01

Q: Since an instant replay system for tennis was introduced at a major tournament, men challenged 1413…

A: Q = 1 - P = 0.7063 Test Statistic is given by:Z = (0.2951 -0.291)/0.0205 = 0.20 So, Z = 0.20

Q: Many people believe that criminals who plead guilty tend to get lighter sentences than those who are…

A: Expected count (E) = Row sub total ×Column sub totalGrand total

Q: In the General Social Survey, respondents were asked "If your party nominated a woman for President,…

A:

Q: Listed below are the heights (inches) for the simple random sample of supermodels Lima, Bundchen,…

A: Given data is70,71,69.25,68.5,69,70,71,70,70,69.5sample size(n)=10α=0.01

Q: Twenty years ago, 57% of parents of children in high school felt it was a serious problem that high…

A: Denote p as the true proportion of parents, who think that high school students were not being…

Q: Twenty years ago, 52% of parents of children in high school felt it was a serious problem that high…

A: Given: Hypothesized population proportion(p0)=0.52Number of parents in survey(n)=800Total parents…

Q: The alternative hypothesis for this test( in words) is?

A: Test is that whether supermodels are taller than the typical woman.

Q: Many people believe that criminals who plead guilt tend to get lighter sentences than those who are…

A: The observed values are

Q: A college entrance exam company determined that a score of 25 on the mathematics portion of the exam…

A:

Q: The Wall Street Journal Annual Corporate Perceptions Study surveyed readers and asked how each rated…

A: Given Information :  The Wall Street Journal Annual Corporate Perceptions Study surveyed readers and…

Q: A polling company contends that an agent conducts a mean of 53 in-depth home surveys every week. A…

A: Correct option is (e)

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.