uppose the proportion of all college students who have used marijuana in the past 6 months is p = 0.40. In a class of 125 students that are representative of all college students, would it be unusual for the proportion who have used marijuana in the past 6 months to be less than 0.34? Explain how you made your decision.

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A: Two sample z test for proportions: Two sample z test for proportions is the hypothesis test to test…

Q: The failure rate for taking the bar exam in Philadelphia is 41%.  If 375 people take the bar exam,…

A: Given that, The failure rate for taking the bar exam in Philadelphia is 41%  i.e. probability, p =…

Q: The median salary of the 1,073 teachers in a large public school district is $38,850. If the 65th…

A: The median salary of the 1,073 teachers in a large public school district is $38,850. If the 65th…

Q: Jerri collects data from 100 people about how much mileage they put on their vehicle each week.…

A: Given information: Jerri collects data from 100 people about how much mileage they put on their…

Q: A recent drug survey showed an increase in the use of drugs and alcohol among local high school…

A: Provided data are, x1 = 65   n1 = 100 x2 = 60   n2 = 100

Q: In a large data set, the 49th percentile is 523 and the 71st percentile is 675.  About what…

A:

Q: The proportion of Americans who have frequent migraines is 15.2% according to the CDC. An…

A:

Q: The U.S. Air Force requires that pilots have heights between 64in and 77in. The heights of women are…

A: Obtain the percentage of woman meeting the height requirement. The percentage of woman meeting the…

Q: Of 60 patients treated with a certain medication, 24 showed no improvement. What percent of patients…

A: Total patient=60 Patient who showed no improvement=24 To calculate: what percent of patients…

Q: Two factory plants are making TV panels. Yesterday, Plant A produced 4000 panels. Ten percent…

A: Given that Plant A produced 4000 panels and defective is 10% Defectives from plant B is 3%,  overall…

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: The median salary of the 1,073 teachers in a large public school district is $38,850. If the 65th…

A: Consider the given information in the problem, total number of teachers=1073 65th percentile=65% of…

Q: (c) If the average cost of travel by bus increases by 10%, but the travel time by bus de- creases by…

A: This is a problem related to percentage. Based on the general formula and concept we will answer the…

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A: Given Information: Country A: Sample size n1=1004 Sample proportion p^1=0.53 Country B: Sample size…

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: eart attack or stroke within one year, and of the ticagrelor patients, 565 suffered a heart attack…

A:

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A: There are two independent samples which are Country B and Country C. We have to test whether the…

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A:

Q: A pollster wishes to estimate the number of left-handed scientists. How large a sample isneeded in…

A:

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A:

Q: i) Test, at the 3% level of significance, whether the proportion of adults who experience an adverse…

A: For sample 1, we have that the sample size is N1= 733 the number of favourable cases is X1= 103, so…

Q: Which of the following is the correct expression for 70% of X? . For a number X, 40% of X is what…

A:

Q: In a recent study, 46% of people enjoy country music.  If 200 people are surveyed about their…

A: Given : Proportion (prop.) of people enjoy country music p = 46% = 0.46 Sample size of people n =…

Q: Use the figure to the right, which shows the percentages of adults from severa power plants in their…

A: Null hypothesis: H0: pl=p2 Alternative hypothesis: Ha: pl≠p2

Q: Two factory plants are making TV panels. Yesterday, Plant A produced 10,000 panels. Ten percent of…

A:

Q: A random sample of 302 Californians found that 129 support Measure A. Build a 88% Cl for the…

A: Given that  Random sample size (n) = 302 Supported measure A = 129   Sample proportion (p) =…

Q: A researcher is interested in maximum-security inmates. She groups inmates by the type of crime…

A: Here, the stratified random sampling method was used. Because the whole population was divided into…

Q: A Correctional Psychologist wants to compare the number of criminal convictions of Persons Deprived…

A: Given information: The data represents the values of the variables number of criminal convictions,…

Q: In a sample of 47 men, 36 said that they had less leisure time today than they had 10 years ago. In…

A: We have to perform test for difference in two proportion.

Q: A random sample of 144 residents in a community produced 88 residents testing positive for the…

A: Null Hypothesis: H0:p=0.5 Alternative Hypothesis: H1:p≠0.5 Given information:…

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A:

Q: In a survey, the median household income in a country was found to be £27000, and the mean household…

A: Given: Mean=53000Median=27000

Q: The results of a nationwide aptitude test in Mathematics are normally distributed with μ=80 and…

A:

Q: In many states, a 17% risk of a car accident with a blood alcohol concentration of 0.08 is the…

A: Since, it is given that in many states, a 17% risk of a car accident with ablood alcohol…

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A: We have to test the claim that "the proportion of adults in Country C who favor building new nuclear…

Q: A pharmaceutical researcher wants to determine the proportion of people who believes that branded…

A: Given that  Margin of error =E =1%=0.01 95% confidence.

Q: Using a random sample of 4000 TV households, a media research company found that 65.8% watched the…

A:

Q: Two factory plants are making TV panels. Yesterday, Plant A produced 8000 panels. Ten percent of the…

A:

Q: Two factory plants are making tv panels. Yesterday, plant A produced 8000 panels. Seven percent of…

A: It is given that plant A produced 8000 panels yesterday.The total production of panels will be 8000…

Q: What proportion of the population score above an 18 on the ACT? What proportion of students score…

A: Given: Let X denote the SAT score thus, X~ N(500, 1002) Let Y denote the ACT score thus, Y~ N(20,…

Q: Asians and Hispanics. At a=0.05, can you reject the claim that the proportion of newlywed Asians who…

A: Answer is explained below

Q: a) What proportion of the sampled wafers had (P 2 8)? b) What proportion of the sampled wafers had…

A: 5. a) The frequency is, Number of Particles Cumulative frequency Frequency Number of Particles…

Q: It is bleieved that the percent of convicted felons who have a history of juvenile deliquency is…

A: Solution: State the hypotheses Null hypothesis: That is, the percent of convicted felons who have a…

Q: Katrina must take five exams in a math class. If her scores on the first four exams are 71, 69, 85,…

A: Given that Katrina scores on the first four exams are 71, 69, 85, and 83 and suppose she scores x…

Q: For this year's mayoral election, voter dissatisfaction is very high. In a survey of 500 likely…

A: It is given that the number of voters who plan to write in an independent candidate is 240 and the…

Q: The proportion, po, of foraging bumblebees not exposed to pesticides who bring very little pollen…

A:

Q: A principal of a college wants to estimate the proportion of smokers among his students. What

A: Given : Margin of error, E = 10% = 0.10 Sample proportion = 0.30

Q: What is the percentage of players whose age is less than 32?

A: here given  mean = 33 year  standard deviation  =  2 year x= retirement age

Q: According to the Business and Financial Times newspaper, through January 25, 2018, majority of…

A: Given that there are 162 companies. The number of companies showed beat estimates is 104. The number…

Q: Students surveyed boys and girls separately to determine which sport was enjoyed the most. After…

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.