From July 5-7, 2017, the Gallup Organization asked a random sample of 1,021 adults– aged 18 and older living in the United States and Washington D.C. – “In general, how harmful do you feel secondhand smoke is to adults?” and found that 59% believe that secondhand smoke is very harmful. The margin of sampling error was ±4 percentage points at the 95% confidence level. Calculate a 95% confidence interval for the percentage of all adults - aged 18 and older living in the United States and Washington D.C.- who believe that second smoke is very harmful.  % to  %

Q: In a survey, 10 people were asked how much they spent on their child's last birthday gift. The…

A: Here we need to construct an 80% CI for the mean amount of money spent on child's last birthday…

Q: In a survey, 8 people were asked how much they spent on their child's last birthday gift. The…

A: The sample size, i.e., the sampled number of people, n=8.The sample mean, x¯=$37.The sample standard…

Q: Thirteen out of the 137 randomly selected faculty members who were surveyed at a community college…

A: Obtain the 90% confidence interval for the proportion of all faculty member at the community college…

Q: what would be the 90% confidence interval of the true proportion of young adults who have received…

A: Given that sample size is n = 190 And the sample proportion is 70% = 0.7 At 90% confidence level,…

Q: A national air traffic control system handled an average of 47,189 flights during 29 randomly…

A: The sample size is 29The sample mean is 47189The sample standard deviation is 6351We have to…

Q: joint USA Today/CNN/Gallup Poll in July 2020 indicated that of 832 white adults, 46% thought…

A: Given n=832 P=0.46

Q: In a survey, 28 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: We wish to estimate what per cent of 18 to 25-year old's that own a Samsung phone. Out of 400…

A:

Q: In a survey, 20 people were asked how much they spent on their child's last birthday gift. The…

A: The random variable X is the amount people spent on their child's last birthday gift The sample size…

Q: confidence inferval for the actual percentage of students who want to pursue a college course.…

A: here from given  n = sample size  = 600 x= no of student expressed interest to purchase a college…

Q: In a survey, 26 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: In a survey, 14 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: Star and Tribune newspaper, there is an article entitled “1 in 8 school buses fail tests.”   The…

A: Formula for the sample size needed to estimate a population proportion is

Q: According to a report on sleep deprivation by the Centers for Disease Control and Prevention, the…

A: Reviewing information, Group A p1=7.8%=0.078 n1=11506 Group B p2=9.1%=0.091 n2=4792

Q: In a survey, 28 people were asked how much they spent on their child's last birthday gift. The…

A: Since population standard deviation is unknown, Use t-distribution to find t-critical value. Find…

Q: In a survey, 15 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: A couple wants to rent an unfurnished apartment room in New York next month. The mean monthly rent…

A:

Q: deprivation by the Centers for Disease Control and Prevention, the proportion of California…

A:

Q: In a survey of 3115 adults aged 57 through 85​ years, it was found that 86.1​% of them used at…

A:

Q: What proportion of the sample reported that they had been cyberbullied?

A: Givensample size(n)=14795No.of respondents say yes they had been cyberbullied(x1) = 2219No.of…

Q: Pew Research Center survey asked a variety of science questions of independent rande public…

A: The value of z at 98% confidence level is 2.326, which can be obtained by using the standard normal…

Q: On September 14, 2000, a cross-sectional survey of 24,000 residents of a western state revealed that…

A: Given: n = 24000 Number of tuberculosis cases X = 145 Proportion p^ = Xn Formula Used: Confidence…

Q: In a survey, 28 people were asked how much they spent on their child's last birthday gift. The…

A: It is given that  Sample mean = 46 Sample standard deviation = 10 Sample size = 28

Q: A survey of 20 people asked, “If you’ve ever been married, how old were you when you were first…

A:

Q: It is believed that slightly over 50% of Americans own pets. A 95% confidence interval for the…

A: Confidence Interval: The form of the confidence interval is, CI = Point estimate ± Margin of error…

Q: In a randomly selected group of 650 automobile deaths, 180 were alcohol-related. Construct a 95%…

A:

Q: In 2015 as part of the General Social Survey, 1131 randomly selected American adults responded to…

A:

Q: survey conducted by Gallup in 2020 asked 1,102 randomly selected U.S. adults, "What do you think is…

A: We have given that  Sample size n=1102 90% confidence interval.  = (0.6773, 0.7227)

Q: In a survey, 14 people were asked how much they spent on their child's last birthday gift. The…

A: Given information- Sample size, n = 14 Mean, x-bar = $32 Standard deviation, s = $20 Confidence…

Q: If the mean flying time for a sample of 65 pilots was 15.6 hours per month, and the population…

A:

Q: In a survey, 31 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: A sanatorium conducted a study on 3,500 women over 35 years of age, of whom 220 reported having…

A: Step 1: State the given data: number of favorable cases, x = 220sample size, n = 3500confidence…

Q: In a random sample of 184 college students, 97 had part-time jobs. Find the margin of error for the…

A: Given : Sample Size, n = 184 Number of successes, x = 97 confidence level,c=0.99

Q: Construct a 95% confidence interval for the population proportion of students who graduate within…

A: The sample size is n = 400 And the number of students who graduate within six years, X = 108 The…

Q: In a survey of 74 US females, 56 said they had gone to the dentist within the past year. What is…

A: Given X=56 n=74

Q: In a survey, 29 people were asked how much they spent on their child's last birthday gift. The…

A: Answer  Given  Confidence interval CI = 80%   α=1-0.80    =0.2 sample size [n] =29  degree of…

Q: In a survey, 23 people were asked how much they spent on their child's last birthday gift. The…

A: Givensample size(n)=23sample mean (x) = 31standard deviation (s) = 8α = 1-0.95=0.05α2=0.025degrees…

Q: In a survey, 13 people were asked how much they spent on their child's last birthday gift. The…

A: From the provided information, Sample size (n) = 13 Sample mean (x̄) = 50 Sample standard deviation…

Q: In a sample of 95 recommendations, it is found that 56% of them made money. Determine the upper…

A: Proportion is almost similar to the concept of probability. Proportion is a fraction of population…

Q: In a survey, 22 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: A Gallup poll of 1487 adults showed that 43% of the respondents have Facebook pages.  Construct a…

A: Confidence Interval: In statistics, we can say a range of values of the specified population…

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.