The recidivism rate for convicted sex offenders is 14%. A warden suspects that this percent is higher if the sex offender is also a drug addict. Of the 359 convicted sex offenders who were also drug addicts, 65 of them became repeat offenders. What can be concluded at the a = 0.05 level of significance?

Q: A report from the Center for Science in the Public Interest-a consumer group based in Washington,…

A:

Q: If the statistical analysis shows that the percentage of men taking Vitamin E who de- veloped…

A: The researchers conducted a designed experiment by randomly selecting the healthy men from different…

Q: Past studies have indicated that the percentage of smokers is estimated to be about 33%. Given the…

A:

Q: tudies if age correlates with the average number of hours of sleep, so she selected a random sample…

A: Given: sample size(n)=10   Age(x) Hours of sleep(y) xy x^2 y^2   8 8 64 64 64   15 8 120 225…

Q: One sample has n = 6 and M = 10. A second sample has n = 4 scores with M = 15. If the two samples…

A: Combined mean = n1x1¯+n2x2¯n1+n2

Q: A sample of 20 engineers employed with a company for three years have been tested on a management…

A: Null Hypothesis; H0: The means of the three testing programs are equal. Alternative Hypothesis: H1:…

Q: Calculate the predicted self-control score for a person living in a good neighborhood who is 18…

A:

Q: an you conclude that the percentage of people aged 18-29 who have a tattoo is less than 25%

A: Given : n=830 , X=166 , p0=0.25 , α=0.01 The estimate of the sample proportion is ,…

Q: The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.35…

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Q: If my p-value is 0.062 should I reject it and support my claim?

A: Basic: Rejection or acceptance of null hypothesis  is totally depending  on p values and…

Q: An analysis was conducted to determine whether the average height of the 25 girls in the same class…

A: To test whether the average height of 25 girls is different from the general population of 15-year…

Q: kindly assist,   An epidemiologist who is working in Capricorn Department of Health investigated…

A: We have given that  Sample size n =10000 Favorable cases x =275 Sample proportion p^=x/n  =275/10000…

Q: In statistical analysis, the burden of proof lies traditionally with:

A: A test is said to be statistically significant if the null hypothesis is

Q: If a study determines the difference in average salary for sub populations of people with blue eyes…

A: Given, As the study determines that the difference in average salary for sub-populations of people…

Q: At the 5% significance level, which predictor variable(s) is(are) individually significant? Only X1-

A: For predictor variable x1: From the output, the P-value for x1 is 0.0286. The hypothesis is, Null…

Q: The recidivism rate for convicted sex offenders is 15%. A warden suspects that this percent is…

A:

Q: In the general population, Democrats are estimated to have an average mental health index score of…

A: The summary statistics of mental health index for the general population is mentioned in the table.…

Q: One sample with n=4 scores has a mean of 12, and a second sample with n=6 scores has a mean of 8.…

A: Given information Sample 1 n1 = 4, µ1= 12 Sample 2 n2 = 6, µ2= 8

Q: versity is trying to determine how many of their students have watched a bystander intervention…

A: Given: Total number of students = 3500 Number of students included in the survey = 1050 Percentage…

Q: A Social Psychologist is interested in finding out if there is a difference in the anxiety…

A: Hypotheses for the test are given below:

Q: A Plitical pollster wants to know what proportion of voters think james burger should go away and…

A:

Q: In examining the ability of users to complete a variety of information-seeking tasks on their mobile…

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Q: If you choose to work with a t-score, how many degrees of freedom would you have?

A: Here given  Sample mean = 87 Sample size = n = 25

Q: A software company is interested in improving customer satisfaction rate from the 80% ourrently…

A: Solution Given that , claim proportion of customer satisfaction p=80% That p=0.80 To test the…

Q: data has extreme scores, what is the best measure of average?

A: The mean is the average value of the data set. It is calculated by summing up all the observations…

Q: A Social Psychologist is interested in finding out if there is a difference in the anxiety…

A: Given: data set 1 : 10,12,8,14,9,10,11,15,6,7 data set 2 : 14,15,10,11,17,17,12,16,18,9

Q: A report from the Center for Science in the Public Interest-a consumer group based in Washington,…

A: Solve

Q: The claim is that the proportion of peas with yellow pods is equal to 0.25 or 25% the sample…

A:

Q: Blank are more representative of a population, but blank are easier to obtain

A: The sample is a set of units that is obtained from a population, which represents the population.…

Q: A teacher measured brain activity in all 60 seniors in her Statistics class in the first week of…

A: The null and alternate hypothesis are H0 : μd=0HA : μd<0 where, μd is the difference of the first…

Q: A Chinese cell-phone manufacturer exclusively uses robots in one of its factories. A random test run…

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Q: Only about 10% of all people can wiggle their ears. Is this percent different for millionaires? Of…

A: Here use single proportion z test Only about 10% of all people can wiggle their ears. Is this…

Q: The test scores for a class of 203 students are computed. What is the location of the test score…

A: Third quartile is above 75% of the observations.

Q: What percentage of the data in a sample falls below the third quartile Q3?

A: There are three quartiles Q1, Q2 ans Q3. 25% of observations lies between each two quartiles.

Q: In a sample of 88 children selected from a city, 8 children suffer from asthma. What is the P-value…

A: Statistical hypothesis testing is an important method in inferential statistics. Statistical tests…

Q: One sample of n = 10 scores has a mean of M = 8, and a second sample of n = 5 scores had a mean of M…

A:

Q: The housing market in the Bay Area is absolutely insane! The competition for houses is sometimes so…

A: From the provided information, 236 of the 339 houses sold involved buyers paying over the asking…

Q: If a newborn lab rat receives a hormone and its weight (in ounces) is converted into a z score that…

A: The standard normal variable is z, which follows the normal distribution with the mean of 0 and…

Q: In a 70 item test, Chloe got a score of 50 which is the third quartile. What does it mean?

A: We know that their are 75% data points are lies below the third quartile.

Q: The recidivism rate for convicted sex offenders is 9%.  A warden suspects that this percent is…

A:

Q: A Verizon researcher compared the number of text messages sent by a sample of teenage boys to the…

A: a) In this case, the Verizon researcher compared the number of text messages sent by a sample of…

Q: A researcher uses a repeated-measures design to compare individuals’ performance before treatment…

A:

Q: Suppose a study revealed 63% of all subjects possessed trait A, 31% possessed trait B, and 18%…

A: Solution

Q: So far, Walter has scores of 18, 17, 19, and 21 points for the first four science quizzes. What does…

A: Walter scores of first four science quizzes is 18, 17, 19 and 21 points.

Q: A study reported in the Journal of Small Business Management concluded that self- employed…

A: Null Hypothesis:   H0: There is no difference in the job satisfaction among the four professions.…

Q: Using a significance level of α = 0.05, state your conclusion in terms of H0.?

A: According to the provided information, the level of the significance level is 0.05. The level of…

Q: A clinical psychologist took a sample of four people from the population of people with anxiety…

A:

Q: Fifty people are selected randomly from a certain population and it is found that 12 people in the…

A: Sample size = n = 50 Sample number of events = x = 12 Sample proportion = p̂ = x/n = (12/50) =…

Q: In a class of 31 students, how many would be above the third quartile?

A: From the above data  Sample size n=31 How  many would be above the third quartile?

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.