A publisher reports that 49% of their readers own a personal computer. A marketing executive wants to test the claim that the percentage is actually different from the reported percentage. A random sample of 200 found that 42% of the readers owned a personal computer. Is there sufficient evidence at the .10 level to support the executive's claim?

Q: A television executive claims that the percent of households that watch the Macy's parade on…

A: The null and alternative hypothesis is given by,H0:P=0.65Ha:P<0.65 Given: n=171, x=households…

Q: Which of these best describes the conclusion we could make using a 5% level of significance? Select…

A: The decision in the hypothesis testing can be made using two important methods. They are the p-value…

Q: In 2005, Health Canada claimed that 16.8% of Canadian adults are obese. A researcher wanted to check…

A: Given, The sample proportion is,

Q: A recent survey showed that from a sample of 500 packages delivered by a Postal Service, 480 were…

A: Given: p0=0.98α=0.01n=500x=480

Q: The sales rep of a waterbed claims that 25% of the Filipino died because of cardiovascular diseases.…

A:

Q: A psychologist claims that students are more attentive in classes taught by instructors rated as…

A: Given that  Based on the data given it is related to two sample proportion for hypothesis test The…

Q: A manufacturer wanted to know if more coupons would be redeemed if they were mailed to the female in…

A: Solution: Given information: n=50 Sample size  xd= 1.5   Difference of sample mean sd= 4.75…

Q: A researcher made a survey regarding the proportion of male and female college students who dropped…

A:

Q: Most adults would erase all of their personal information online if they could. A software firm…

A:

Q: Construct a 90% confidence interval for the true difference between the mean amounts of time spent…

A:

Q: Approximately 20.5% of the U.S. population 5 years old and older speaks a language other than…

A: sample size is 400 & Population Proportion =0.205

Q: A national health survey weighed a sample of 260 boys aged 6-11 and found that 45 of them were…

A: Hypothesis Testing

Q: The owner of a local nightclub has recently surveyed a random sample of n = 250 customers of the…

A: From the provided information, Sample size (n) = 250 She would now like to determine whether or not…

Q: In a survey of 1150 adult males, 805 said they use the Internet. In a survey of 1050 females, 746…

A: Let x1=The number of male internet users. And x2=The number of female internet users. With the usual…

Q: At the 0.05 level of​ significance, is there evidence of a difference in the proportion of males and…

A: For males, sample size n1 = 300, and proportion of males who make an impluse purchase is 62% = 0.62…

Q: The accompanying table contains the data for the amounts (in oz) in cans of a certain soda. The cans…

A: Given information- Median amount = 16 oz Significance level, α = 0.01 Claim: We have to test the…

Q: It has been claimed that at UCLA 43% of all students live on campus. Researcher Ebony Robinson…

A: Given X=112 n=250

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

A: Among 274 people over the age of 55, 76 dream in black and white, and among 323 people under the age…

Q: A software company is interested in improving customer satisfaction rate from the 61% currently…

A: It is given that x=176, n=267 and P=0.61.

Q: A software company is interested in improving customer satisfaction rate from the 61% currently…

A:

Q: The mean amount of money last year spent by customers at the Texas Roadhouse in Cedar Falls, Iowa…

A: Given : The mean amount of money last year spent by customers at the Texas Roadhouse in Cedar Falls,…

Q: reporter has claimed that the majority of Colleges in the United States are Private For-Profit…

A:

Q: Most adults would erase all of their personal information online if they could. A software firm…

A:

Q: Would you favor spending more federal tax money on the arts? Of a random sample of n1 = 236 women,…

A: From the provided information,

Q: o dream in black and white is greater than the proportion for those under 25. Complete parts (a)…

A: We have given that  Sample size n1 = 320 , n2= 306  Favorable cases x1= 74 , x2= 15…

Q: α is the observed level of significance whereas the p-value is the preset level of significance.…

A: We have given that, α is the observed level of significance whereas the P- value is the preset level…

Q: The XYZ company wants to evaluate whether it discriminates against men or women in its merit pay…

A: It is given that the XYZ company wants to evaluate whether it discriminates against men or women in…

Q: There is not enough evidence to show that population proportion of adults that have never been…

A: Given data number of success , x= 250.0 sample size, n = 97 population…

Q: in october 1947 the gallup organization surveyed 1000 adult americans and asked are you a total…

A: We have given thatn1 = 1000 , x1 = 378n2 = 1000 , x2 = 333Significance level (α) = 0.05Now,p̂1 =…

Q: Suppose you take a sample of 25 Reese's pieces. The proportion of orange is 0.4. What is the p-value…

A: Solution

Q: Explain how to calculate and interpret the p-value for a mean and a proportion, for both a one- and…

A: P-value is the probability of obtaining the value of the test statistic or a value even more…

Q: In a fishing lodge brochure, the lodge advertises that 75% of its guests catch northern pike over 20…

A: Given that, In a fishing lodge brochure, the lodge advertises that 75% of its guests catch northern…

Q: A research center claims that at least 23% of adults think their taxes will be audited.  A random…

A: Yes, there is a enough evidence to reject the claim Explanation:Step 1 : Formulate the hypothesis…

Q: Professor Jennings claims that only 35% of the students at Flora College work while attending…

A:

Q: A grassroots group opposed to a proposed increase in the gas tax claimed that the increase would…

A: Working classprofessional (middle incomes)Professional…

Q: An article reported a survey of patients with Parkinson's disease. Of 166 patients who said they…

A: Given data : x1= 75 n1= 166 x2= 49 n2= 96 significance level, 0.1

Q: One survey showed that among 766   randomly selected subjects who completed four years of​ college,…

A: Denote p as the true population proportion of smokers in the college.

Q: In a fishing lodge brochure, the lodge advertises that 75% of its guests catch northern pike over 20…

A:

Q: Past surveys showed that 44.2% of Filipino households have pets. A recent survey reported that 516…

A: Given: x = 512 n =1200 p= 44.2% = 0.442

Q: home improvement company is interested in improving customer satisfaction rate from the 58%…

A: We have given that  Sample size n=273 favorable cases x=171  Population proportion p=58%=0.58 Sample…

Q: A home improvement company is interested in improving customer satisfaction rate from the 51%…

A: Step 1:Suppose p is the customer satisfaction rate of the population.It is needed to test whether…

Q: What proportion of students have a meal plan on campus? A local university claimed that 70% of…

A: Given that, a local university claimed that 70% of students had a campus meal plan. A random sample…

Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.