The Pew Forum on Religion and Public Life reported on Dec. 9, 2009, that in a survey of 2003 American adults, 25% said they believed in astrology. a. Calculate and interpret a confidence interval at the 99% confidence level for the proportion of all adult Americans who believe in astrology.b. What sample size would be required for the width of a 99% CI to be at most .05 irrespective of the value of p̂?

Q: We are interested in comparing the percentage of females versus males who expect their future to be…

A:

Q: In a survey of 3239 adults aged 57 through 85 years, it was found that 85.8% of them used at least…

A: Given : n=3239 p^=85.8%=0.858The formula for confidence interval for population proportion is…

Q: A survey of several 8 to 11 year olds recorded the following amounts spent on a trip to the mall:…

A: The amounts spent on a trip to the mall is 19.36,29.95,7.82,8.36,21.07,14.06,22.22

Q: In a survey of 3320 adults aged 57 through 85​ years, it was found that 83.5​% of them used at least…

A: Given that n=sample size= 3320  Point estimate=p^=83.5%=0.835a) The number of people who used at…

Q: By law, all new cars must have airbags on both the driver's side and the passenger's side. There is…

A: Given that  n=55 , X=35

Q: The Pew Social Media Update 2014 surveyed 1,597 adult internet users on which social media websites…

A: It is given that sample size (n) is 1597 and the value of x is 1134.

Q: A statistics instructor randomly selected four bags of​ oranges, each bag labeled 10​ pounds, and…

A: From the provided information, Sample size (n) = 4 Confidence level = 95%

Q: . How many of the 3335 subjects used at least one prescription​ medication? b. Construct a​ 90%…

A: n = 3335 p = 0.804

Q: In a poll of 29 randomly selected students showed that 29.2 % of the respondents believe in global…

A: Given,sample size(n)=29sample proportion(p^)=0.292

Q: malls were the exclusive focus of 10 percent of articles. The standard error of that proportion is 3…

A: From the provided information,Confidence level = 95%

Q: 829 adult were surveyed in one city, and 51% of them are opposed to the use of the photo-cop for…

A: Given data: n = 829 p = 0.51

Q: A survey of several 9 to 11 year olds recorded the following amounts spent on a trip to the mall:…

A: From the provided information,Sample size (n) = 7Confidence level = 95%

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

A: Using excel formula “=T.INV(1-(0.2/2),22)”, the critical value of 80% confidence level is 1.321.

Q: A genetic experiment with peas resulted in one sample of offspring that consisted of 443 green peas…

A: Find z-critical value:…

Q: A company revealed their latest survey about the population beliefs. The survey reported 28 % of…

A: Given Information: P = 0.28 Sample size (n) = 2003    a) The 95% confidence interval can be…

Q: The Pew Social Media Update 2014 surveyed 1,597 adult internet users on which social media websites…

A: Number of users (n) = 1597 Number of  users who use Facebook (x) = 1134 Find the sample proportion:…

Q: A statistics instructor randomly selected four bags of​ oranges, each bag labeled 10​ pounds, and…

A: Given X-bar=9.45 n=4

Q: hen constructing a confidence interval, a larger sample will ___ the margin of error and the…

A: The confidence interval can be calculated as: Confidence Interval =x¯±z×σn=x¯±E Here, x¯=…

Q: A company revealed their latest survey about the population beliefs. The survey reported that 22% of…

A: Introduction: The confidence interval measures the degrees of uncertainty in a sampling method. in…

Q: a. Interpret a contidence level of 94%. b. Construct and interpret a 94% confidenc interval to…

A: Sample proportion p = 775/1100 p = 0.7045   n = 1100

Q: Use the given degree of confidence and sample data to construct a confidence interval for the…

A: Given data,n=786x=10p=x/n=10/786 =0.0127z-value at 98% confidence is Zc=2.326

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

A: Sample mean = x̅ = 46 Sample size = n = 23 Sample S.D = s = 12 Standard Error = s/√n  = 12/√23…

Q: A March 2021 Gallup poll asked a nationally representative sample of randomly selected U.S. adults…

A:

Q: Find the margin of error and 95% confidence interval for the following study. A survey of 1974…

A: Given sample size(n)=1974sample proportion(p^)=88%=0.88confidence level=95%

Q: A trade magazine routinely checks the drive-through service times of fast-fod restaurants. A 95%…

A: Given : confidence level =95%Lower limit =163.3Upper limit =167.1

Q: In a survey of 3293 adults aged 57 through 85​ years, it was found that 80.8​% of them used at least…

A: Given Information Total adults(n) = 3293

Q: how many students do we need to construct a 95% confidence interval for the proportion of the…

A: here given ,  margin of error  = 3% = 0.03  confidence level = 95%  n = 150  p^= 0.68

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: If 64% of a sample of 550 people leaving a shopping mall claims to have spent over $25 create and…

A: Given,   Sample size = 550 Sample proportion = 0.64   Critical value: Using z-table, the z-critical…

Q: In the week before and the week after a​ holiday, there were 11,000 total​ deaths, and 5467 of them…

A: Find z-critical value:…

Q: Listed below are the amounts of net worth​ (in millions of​ dollars) of the ten wealthiest…

A: Sample size(n)=10sample mean(x¯)=171standard deviation(s)=33.79020degrees of…

Q: We take a sample of 218 men and find they have an average commute time of 32 minutes with a standard…

A: Given: a sample of 218 men and find they have an average commute time of 32 minutes with a standard…

Q: n a random sample of 800 men aged 25 to 35 years, 24% said they live with one or both parents. In…

A: For Men : Sample Proportion 1 (p^1)(\hat p_1) = 0.24 Sample Size 1 (N1)(N_1) = 800   For Women :…

Q: In a poll of 26 randomly selected students showed that 24.6% of the respondents believe in global…

A: n=26p=0.246confidence interval =0.80margin of error=?

Q: in a survey, 27 people were asked how much they spent on their child's last birthday gift. the…

A: sample size(n)=27 mean(x)=30 standard deviation(s)=20 confidence level=95%

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.