The proportion of commuters on PSU – Berks campus is purported to be 65%. A professor believes this to be inaccurate.  He randomly selects 300 students on campus and determines 200 of them to be commuters.  Can the professor reject the campus claim of 65%?

Q: Last year at Townsburg High School, 28% of the graduating seniors took the ACT exam, 34% of the…

A: It is given that the proportion of the graduating seniors took the ACT exam is 0.28, the proportion…

Q: A market researcher's claim is that women spend more time each day on Facebook than men.  If p1…

A: Here let p1 denote the proportion of women and p2 denote the proportion of men. The claim is that…

Q: In order to have a margin of error of 2%, people should be surveyed.

A: we are given that 24% people consider summer as their favourite season (p) = 0.24 to find  number of…

Q: A questionnaire is sent to 10000 persons. 5000 responded to the questionnaire. 3000 of the…

A: From the provided information, the survey is based on questionnaire sent to 10,000 persons. This…

Q: A city with 8000 registered voters has 4 candidates running for the city Mayor. Last week, 650…

A: Probability is a measure of certainty and uncertainty. Probability is the one of the oldest branch…

Q: A local radio station has a fan base of 20,000 listeners. THe station wants to know if its audience…

A: Given: The fan base having the value of 20,000 listeners in which the station based on the audience…

Q: A national health survey weighed a sample of  530  boys aged  6 - 11  and found that  78  of…

A: Given : Claim : The proportion of boys who are overweight is greater than the proportion of girls…

Q: A total of 120 high school students were surveyed about their winter break shopping habits. The…

A: Given that a total of 120 high school students were surveyed about their winter break shopping…

Q: In a class of 50 students, there are 30 males. Among the male students 10% a students. 20% of the…

A: Given data,Number of students =50No of Males =30No of Females =2010% of male students are honor…

Q: The class president collected data on 150 randomly selected 17-year-olds at his school. He surveyed…

A:

Q: A survey of 225 residents of a neighborhood indicates that 135 of them are in favor of having a…

A: Given, total residents = 225 135 are in favor of block party.

Q: About 2% of the population has a particular genetic mutation. 600 people are randomly selecte Find…

A: Given data,p=2%=0.02n=600Mean=?

Q: Helga scored in the 70th percentile rank on an exam. If 300 students took the exam, how many…

A: Given: percentile rank of Helga: 70th           total number of students who took exam: 300 students…

Q: The lottery commissioner's office in a state wanted to find if the percentages of men and women who…

A: It is given that the sample of 490 men, in that 150 play the lottery often and the sample of 315…

Q: There are 360 students and 2/3 went to a field trip. Of these students, 40% were wearing t- shirts…

A:

Q: In a crop of blueberries, there will be an average of 6500 berries with stdev = 318 %3D berries. The…

A: Given : Mean , μ= 6500 standard deviation, σ = 318

Q: Maci is a social networking maniac! Although she prefers Instagram, she also spends a lot of time…

A: Introduction A variable is a no., characteristic which can be counted or measured.

Q: According to FBI data, 12% of burglaries.   What should we conclude if the detective clears all…

A: Introduction to binomial distribution: Consider a random experiment involving n independent trials,…

Q: You know that 70 percent of the subs at theme parks in the US are yellow.  There are 220 subs in…

A: Solution Given that  We have total sub parks in the US = 220 we know , 70% of them are yellow = 154

Q: Demetra has taken nine quizzes in an environmental conservation course, and the mean of her scores…

A: Given mean score is 77 and two lowest score which are thrown out are 62 and 64. we have to calculate…

Q: Allstate claims 92% if it's customes are happy with their service. You randomly call 57 customers…

A: From the given information we conduct Z test for proprtion.

Q: In a recent poll, 360 people were asked if they preferred cats or dogs. 49% said they preferred dogs…

A:

Q: A survey was conducted by a website on which online music channels subscribers use on a regular…

A: 11 listened to rap, heavy metal, and alternative rock. 18 listened to rap and heavy metal. 20…

Q: A city official would like to know if there is public support for increasing funding for arts…

A: Here the city official is collecting the data by standing the concert hall after a show and surveys…

Q: A fundraiser is offering a small gift to people making a donation. The donor can choose one of four…

A: The data shows four gifts with a mug, a t-shirt, a plush toy, and a water bottle.

Q: If four out of every seventeen students prefer to write with pens over pencils, what proportion of…

A: Given that four out of every seventeen students prefer to write with pens over pencils.

Q: . A. Ventura is interested in determining what kinds and how many pets people own in Bakersfield. He…

A: Provided information is, Dr. A. Ventura is interested in determining what kinds and how many pets…

Q: Suppose that the results of a survey show that 53% of people consider summer as their favorite…

A: Given that Results of a survey show that 53% of people consider summer as their favorite season.…

Q: a town of 3,000 people, 600 are over 50 years of age and 400 are left-handed. It is also known that…

A:

Q: Suppose that a local band is looking to increase its social media presence. The band's manager hopes…

A: Here the given information is Suppose that a local band is looking to increase its social media…

Q: If a coin is flipped 225 times and the number of Hs is 75. Compute the proportion of Hs. Round to…

A:

Q: Identify the population being studied and the sample chosen. The final exam scores of 44 out of the…

A: Solution: Sample is the subset of population. Population is the entire set of units under study.

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.