marketer belive that 92% of adult in germany own a cell phone . a cell phone manufacture believes that number is actually lower , 200 german adults are surveyed of which , 174 report having cell phones use a 5% level og significance . identity the type of error .

Q: A hospital found out that there is a higher incidence of food poisoning in adults than in children.…

A: Given that, A hospital found out that there is a higher incidence of food poisoning in adults than…

Q: A recent survey of 537 California college students found that 481 had taken an online class in the…

A:

Q: The General Social Survey is an annual survey given to about 1500 U.S. adults selected at random. A…

A:

Q: The Chancellor wants you to calculate a second sample size after sample 1 produced a 40% response…

A: From the provided information, Confidence level = 80% Margin of error (E) = 7% that is 0.07 Sample…

Q: Pierre's Restaurant announced that on Thursday night the menu would consist of unusual gourmet…

A: The hypotheses are given below: Null hypothesis: H0: p=0.50. Alternative hypothesis: H1:p>0.50.…

Q: A recent survey found that 68.6% ofthe population own their homes. In a random sample of180 heads of…

A:

Q: Do teachers find their work rewarding and satisfying? The article “Work-Related Attitudes” reports…

A: Given information- Significance level, α=0.05 Let, p1 = proportion of the elementary school teachers…

Q: In the past, 85% of a lawn-care service’s continue with the service the following year. Last year,…

A:

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: Miller Junior High is considering changing its school colors.  The results of a survey that 16 out…

A: Topic : unitary method

Q: It is thought that 12% of all students taking a particular course received a grade of A. In a sample…

A:

Q: Is there a difference in the mean satisfaction level among the four airlines? Use the .05…

A: The following table is obtained:   Group 1 = Air Waves Group 2 = Belle Air Group 3 = Cirrus…

Q: The Institute of Education Sciences measures the high school dropout rate as the percentage of 16-…

A: 1) The hypotheses for the test are given below. Null hypothesis: H0: p = 0.081 Alternative…

Q: A software company is interested in improving customer satisfaction rate from the 66% currently…

A: From the provided information, A software company is interested in improving customer satisfaction…

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

A: Given data A software company is interested in improving customer satisfaction rate from 61%…

Q: In a recent Gallup poll, 507 adults age 18 and older were surveyed and 269 said they believed they…

A:

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

A:

Q: A marketing manager for a cell phone company claims that more than 35% of children aged 10-11 have…

A: Assume that p is the true proportion of all children aged 10-11 that have cell phones.

Q: A hypothesis test is conducted to determine whether the percentage of US adults that think marijuana…

A: Given,n=400x=144p^=xnp^=144400=0.36

Q: A software company is interested in improving customer satisfaction rate from the 50% currently…

A: The null and alternative hypothesis is defined as:

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

A: We are testing single proportion in this problem. (a) Level of significance: 0.05 Null and…

Q: The General Social Survey is an annual survey given to about 1500 U.S. adults selected at random. A…

A: see the attachment...

Q: The Institute of Education Sciences measures the high school dropout rate as the percentage of 16-…

A: In 2009, high school dropout rate between 16-24 years olds was 8.1% . A pooling company took a…

Q: used their cell phone and 72 of 120 males did so. At the 0.01 level of significance, is there enough…

A: It has been found that many first-time interviewees commit errors that could very well affect the…

Q: A software company is interested in improving customer satisfaction rate from the 62% currently…

A: Population proportion is 0.62 Sample proportion is 90/135 =0.6667

Q: The General Social Survey is an annual survey given to about 1500 U.S. adults selected at random. A…

A: Given: Number of graduates respondents(n1)=222Number of graduates respondents that said Very…

Q: A software company is interested in improving customer satisfaction rate from the 55% currently…

A:

Q: A historian examining British colonial records for the Gold Coast in Africa suspects that the death…

A: The proportion of African that died is p1=x1n1=24534002=0.007205459 The proportion of Europeans that…

Q: The Institute of Education Sciences measures the high school dropout rate as the percentage of 16-…

A: As per our guidelines we are suppose to answer only one question. Given,sample size(n)=1000sample…

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: 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: What is the conclusion? A recent survey done by the Philippine Housing Authority found that 35% of…

A: The hypotheses are given below: Null hypothesis: H0:p=0.35 Alternative hypothesis: H1:p≠0.35 Since…

Q: ​Claim: Fewer than 95​% of adults have a cell phone. In a reputable poll of 1076​adults, 88​% said…

A: From the provided information, Sample size (n) = 1076 Sample proportion (p̂) = 0.88 The hypotheses…

Q: A software company is interested in improving customer satisfaction rate from the 75% currently…

A:

Q: Twenty years ago, 52% of parents of children in high school felt it was a serious problem that high…

A: The hypothesis tests, contain two hypothesis: null hypothesis and alternate hypothesis. The…

Q: 2) Estimate the difference between the ages of male and female respondents with 95% confidence.

A: Given information:   Female Male Mean 47.15625 44.16667 Sum 1509 795 S.D 14.14923 19.87979…

Q: Twenty years ago, 54% of parents of children in high school felt it was a serious problem that high…

A: Given n=850 P0=0.54 so n*P0(1-P0) = 850*0.54*(1-0.54) =211.1

Q: Another pilot study During routine screening, a doctornotices that 22% of her adult patients show…

A: Computing the sample size: The confidence level is 98%. Therefore, α = 0.02 and α/2=0.01. The margin…

Q: Twenty years ago, 53% of parents of children in high school felt it was a serious problem that high…

A:

Q: Twenty years ago, 57% of parents of children in high school felt it was a serious problem that high…

A: From the provided information, Population proportion (p0) = 0.57 Sample size (n) = 700 and x = 244

Q: Does having a non-significant P-value means that the means of the sample will be the same? explain

A: The hypotheses for the means is constructed as: H0: The means of the sample will be the same. H1:…

Q: An article reported a survey of patients with Parkinson's disease. Of 161 patients who said they…

A:

Q: In a small grocery, 23% of the bottled products were sold while 63% of the canned goods were not. If…

A: Solution To find the confidence interval we will use z distribution.

Q: A software company is interested in improving customer satisfaction rate from the 54% currently…

A: Given, A software company is interested in improving customer satisfaction rate from the 54%…

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

A: Given,sample size(n)=107no.of customers were satisfied (X)=73population proportion(P)=0.61

Q: The Institute of Education Sciences measures the high school dropout rate as the percentage of 16-…

A: Here to check the fact first we set null and alternate hypothesis, then we find p-value of the test.…

Q: A company claims that less than 30% of people who both work and live in Newcastle. A study revealed…

A: p̂=x/n,  X=62, n=200, p=0.30 we want to test the hypothesis

Q: A software company is interested in improving customer satisfaction rate from the 75% currently…

A: Given information, A software company is interested in improving customer satisfaction rate from the…

Q: 2. In the past, approximately 24% of workers said they brought work home with them, at least…

A: Let p be the population proportion p=24%, X=104, n=104, level of significance ɑ=0.05

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.