A student read that a 95% confidence interval for the mean age an American first drinks alcohol is 16 +/- 1.2 years.  When asked to explain what this means they said, "95% of all American first drank alcohol between 14.8 and 17.2 years of age."  Is the student's interpretation correct?   Explain why or why not.

Q: You read in a U.S. Census Bureau report that a 90% confidence interval for the median income in 2012…

A: It is given that 90% confidence interval for the median income in 2012 of American households was…

Q: You sample 100 people to see if they have been to the grocery store in the past week, and find that…

A: Obtain the 95% confidence interval for the true population proportion. The 95% confidence interval…

Q: Explain in what situations you can use the z statistic to construct a confidence interval for the…

A:

Q: Listed below are the blood pressure measurements taken from the right and left arm of 5 patients.…

A: From the provided information, The mean and standard deviation of the right arm data can be obtained…

Q: Several years ago, 36% of parents who had children in grades K-12 were satisfied with the quality of…

A:

Q: A survey of 1,000 adults showed 58% believed the driving age should be changed from 16 years of age…

A: Provided information: Number of adults in a survey = 1000 58% believed the driving age should be…

Q: If n = 220,p = 0.4,then what will be the 87.4% confidence interval for the population proportion?

A:

Q: find a 99% confidence interval for the proportion of us adults favoring taxes on soda and junk food.…

A:

Q: Students at Green River plans a study to stats Test scores. Previous research has shown the…

A: We have given that  Margin of error =E =0.5 Population Standard deviation = 1 99%confidence…

Q: We would like to know: "What percentage of college students drink alcohol every day?" In a random…

A: Given that, N=500 X=75

Q: uman resources managers, 71% of respondents felt they should hire new staff within the next three…

A: The Upper limit can be calculated as: Upper limit = Point estimate (sample proportion) + Margin of…

Q: Cameron and Bailey each take random samples and construct 90% confidence intervals for the…

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Q: The General Social Survey asked 1294 people whether they performed any volunteer work during the…

A:

Q: For the following statement explain what's wrong: A 95% confidence interval for the mean response is…

A: The statement is incorrect because the width of a confidence interval can vary depending on the…

Q: sample of 35 students was taken from the local university. These students spent an average of $180…

A:

Q: A department chair wanted to know whose students performed better on a common pass/fail final exam:…

A: p1 :  proportion of students passed in smith's  class p2 :  proportion of students passed in Jones's…

Q: In a survey with human resources managers, 71% of respondents thought they should hire new staff…

A: Given information: Denote the population proportion of all respondents who thought that they should…

Q: one with a 95% confidence level and the other with a 99.7% confidence level. Which interval is…

A: Confidence interval is probability, which refers that population parameter will fall within set of…

Q: Construct a 99% confidence interval to assess whether this represents evidence that parents'…

A:

Q: ed 1294 people whether they performed any volunteer work during the past year. A total of 517 people…

A: The sample proportion is computed as follows,

Q: Ten different families are tested for the number of gallons of water a day they use before and after…

A: From the provided information, The difference between before and after are as follow: Before…

Q: What proportion of college students earn their undergraduate degrees in four years? A college…

A: The formula of the margin of error when the limits given are,

Q: An interactive poll found that 397 of 2,391 adults aged 18 or older have at least one tattoo. A.…

A: Given data: Sample size (n) = 2391 x = 397 adults To construct: 1.95 % confidence interval 2.98%…

Q: n a survey, 25 people were asked how much they spent on their child's last birthday gift. The…

A: Givensample size(n)=25Mean(x)=38standard deviation(s)=19confidence interval(c)=98%

Q: A student organization conducted a statistical study to calculate a 95% confidence interval for the…

A: Hence,

Q: Several years ago, 44% of parents who had children in grades K-12 were satisfied with the quality of…

A: We have given that 44% of parents who had children in grades K-12 were satisfied with the quality of…

Q: Please answer math question

A: Solution: Let X be the diet lost. From the given information, n=42, x-bar=7.2 kg, S=3.9 kg and the…

Q: A new survey found that out of a random sample of 300 high school students throughout the country…

A: From the provided information, Sample size (n) = 300 83% of them still planned on taking the…

Q: Attitudes towards marriage. In a Time and CNN poll, 24% of 205 single women said they "definitely…

A:

Q: A learn-to-type software program claims that it can improve your typing skills. To test the claim…

A: Before After 52 47 44 42 40 46 50 43 46 34 38 50

Q: The report of a sample survey of 1,014 adults says, "With 95% confidence, the true population…

A: The objective of the question is to understand the meaning of the term '95% confidence' in the…

Q: If n= 220, p-hat= .4, then what will be the 87.4% confidence interval for the population proportion?

A:

Q: Several years ago, 50% of parents who had children in grades K-12 were satisfied with the quality of…

A: Given Data Sample Size, n = 1105 Number of successes, x = 491.0 confidence…

Q: What Z score would be used to construct a 90% confidence level? Is it ... a. 1.65 b. 2.33 c.…

A: Confidence Level = 90 Significance Level = α = (100-90)% = 0.1 Critical value = z* = 1.65   […

Q: Several years​ ago, 42​% of parents who had children in grades​ K-12 were satisfied with the quality…

A: Let p be the population proportion of parents satisfied with the quality of education the students…

Q: Several years ago, 43% of parents who had children in grades K-12 were satisfied with the quality of…

A:

Q: What is the effect on a confidence interval if one decreases both sample size and the level of…

A:

Q: 3. In a sample of 300 people, 154 said that they watched news on television. Find the 90% confidence…

A: Given : Sample size of people (n) = 300 Let X : No. of people from sample  who said they watched…

Q: Several years ago, 46% of parents who had children in grades K-12 were satisfied with the quality of…

A: Given  p=0.46, n=1055, X=488

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.