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%?

When conducting research, you take a portion of a larger group of participants and do the research with that smaller group. The larger group is referred to as a population and the smaller group selected from the population is referred to as answer

In a survey of 3088 adults aged 57 through 85​ years, it was found that 87.1​% of them used at least one prescription medication. How many of the 3088 subjects used at least one prescription​ medication?

A city has 4 voting districts. Records from previous years show the proportion of registered voters that voted in previous elections for each district. A political analyst wants to see if those proportions have changed for this year's upcoming elections. The political analyst randomly samples 123 registered voters and asks them which district they live in and if they have voted yet. H0: Pa = 0.3: Pb = 0.2; Pc = 0.2; Pd = 0.3 Test the claim that there is a difference in the proportions using a α =0.01. Round all answers to at least 4 decimal places. a.) Complete the table: District: A, B, C, D; Observed: 36, 32, 19, 36 ( Respectively, matching Category Letters. Total of Observed: 123) b.) What is the chi-square test-statistic for this data? X 2=______ c. For significance level alpha , what is the chi-square Critical Value? Critical Value = _________________ d. What would be the correct conclusion for this hypothesis test?

A survey was administered to 1000 Broward college students. 30% of the respondents indicated that they prefer online classes over face to face classes. How many respondents stated they prefer online classes over face to face classes?

As part of a sixth-grade class project the teacher brings to class a large jar containing 200 gumballs of two different colors: red and green. Andy is asked to draw a sample of his own choosing and estimate the number of red gumballs in the jar. Andy draws a sample of 25 gumballs, of which 15 are red and the rest are green. Use Andy's sample to estimate the number of red gumballs in the jar. Answer:

Suppose that 9% of all athletes in a sport use a banned drug. A test is available that detects 94% of athletes who use the drug. But the test also gives a positive result for 8% of those who do not use the drug. What percent of athletes who test positive for the drug are actually using the drug? Answer: 77.28 %

Dr. A. Ventura is interested in determining what kinds and how many pets people own in Bakersfield. He stands outside Petco and asks people what kind of pet they own. This is the result of his survey: dog=1; cat=2; bird=3; reptile=4; fish=5; other=6 1,1,2,2,2,1,1,3,2,3,1,1,1,2,2,4,4,2,2,1,1,1,5,4,3,4,1,1,1,2,2,6,1,1,2,2,1,2,1,2,6,3,4,5

Indiana has a population of about 7 million people and Ohio about 12 million. Is it possible for there to be a poll where over 50% of Hoosiers say "yes", over 50% of Ohioans say "yes", but over 50% of all residents of both states say "no"? If no, explain why not. If yes, give an example of how that could happen.

A professor wanted to study the number of hours statistics students spend studyingstatistics each week. Out of 19 statistics sections at Santa Ana College, the professorsurveyed each student from 3 randomly selected sections. What is the largest group ofstudents the results of this study can represent?a. All Santa Ana College studentsb. All Santa Ana College students taking a math classc. All Santa Ana College students taking a statistics classd. Students in the three sections the professor surveyed