The Pew Research Center conducted a survey of 45535 adults in 40 countries to learn about major concerns for the future. The survey results showed that 20901 of the respondents are very concerned about climate change. What is the point estimate of the population proportion of adults who are very concerned about climate change? At 90% confidence, what is the margin of error? Develop a 90% confidence interval for the population proportion of adults who are very concerned about climate change. Develop a 95% confidence interval for the population proportion of adults who are very concerned about climate change.

Q: what is measured by a confidence interval and describe the factors that affect the width of a…

A: How much ambiguity there is for any given statistic is a confidence interval. Confidence intervals…

Q: A Businessweek/Harris survey asked senior executives at large corporations their opinions about the…

A: Let "1" represent the current survey Let "2" represent the previous survey Find z-critical…

Q: poll, 74% of California adults (374 out of 506 surveyed) believe that education is one of the top…

A: Given: n = 506 x = 374 p=0.74 The blue of z at a 90% confidence level is 1.645, which can be…

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A:

Q: What is an approximate 99% confidence interval for the slope of the line of best fit?

A: The provided information is, The 99% Confidence interval can be calculated as,

Q: In a survey of 1,954 cellphone owners, adults aged 18 and over, 743 reported that they use their…

A: We have given that,  Number of favorable cases (X) = 430 and sample of the size (n) = 1954 Then,  We…

Q: If the margin of error in an estimate for the mean weight of a shipment is + or -2 pounds at a…

A: From the provided information, The margin of error at a confidence level of 95 percent = ±2 The…

Q: Are boys more likely?  A random sample of 24,468 records of newborn firstborn children revealed the…

A: It is given that the sample size n is 24,468, number of boys in the sample to be (x) 13,175 boys and…

Q: We wish to estimate what percent of adult residents in Ventura County like chocolate. Out of 500…

A: The sample proportion of the sample of size n can be defined as:  Here, X = Total number of success…

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Q: A recent poll of 1001 Americans age 18 and over conducted in May of 2013 found that 80% of the…

A: Obtain the sample size. The formula of sample size is, Here, confidence level is 0.95.   Use EXCEL…

Q: A group of medical students volunteering at a maternity hospital in Florida are looking to determine…

A: Given that, x=392,n=650 The best point estimate of the population proportion is sample proportion…

Q: In A Sample Of 5000 Car Owners, 1826 Said That They Would Seriously consider purchasing an…

A: Given that, x = 1826,  n =5000 (a) The point estimate of the population proportion of car owners…

Q: In a survey of 3444 adults aged 57 through 85​ years, it was found that 85.9​% of them used at least…

A:

Q: A developmental psychologist would like to determine how much fine motor skill changes for children…

A: In statistical inference, there are two types of estimation,  Point estimation and Interval…

Q: The Pew Research Center conducted a survey of 45,535 adults in 40 countries to learn about major…

A:

Q: is 10. Construct a 96% confidence interval to estimate the population mean. What is the point…

A: Here n = 37 N =200 X bar = 68

Q: A Businessweek/Harris poll asked senior executives at large corporations their opinions about the…

A: The sample proportion for current year is, p^c=xcnc=230500=0.46 The sample proportion for previous…

Q: If you think a data point is an outlier, what test can you perform to see if you should omit the…

A: Given that the number of data points in the set is 8.

Q: While it is an uncommon confidence level, find the critical value that corresponds to a confidence…

A: It is given that the confidence level is 0.822.

Q: A Businessweek/Harris survey asked senior executives at large corporations their opinions about the…

A: The confidence interval explains the range of observations within which the true value of the…

Q: Find the point estimate of the percentage of men who have red/green color blindness. b. Find a 90%…

A: Given that sample size n = 80 Number of men who have red/green color blindness, X = 7 At 90%…

Q: There is an ever-increasing number of sources of getting the daily news - traditional newspapers,…

A:

Q: We plan to sample students to construct a 98% confidence interval for the proportion who uses Yelp…

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Q: construct a confidence interval at a 80% confidence level. stributed population.

A: Given : n=15 , X-bar=45  , s=5  , α=0.20 Here , we want to find the 80% confidence interval for the…

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: A survey of 200 Senior High School learners shows that they read on average 18.5 hours per week with…

A: The random variable X follows normal distribution. We have to construct 95% confidence interval.…

Q: The Center for Disease Control and Prevention (CDC) estimates that, on average, 5% to 20% of the…

A:

Q: nutritionist

A: Please refer to the image below

Q: poll surveyed 1024 people about global warming. Of those surveyed, 389 said that they thought global…

A: a. The point estimate (sample proportion for this case is the proportion of people who thought…

Q: From the data, identify the best point estimate of the population mean and 95% confidence interval…

A: We know that, The best point estimate of the population mean is sample mean .

Q: What is the 90% confidence interval of the mean?

A: A confidence interval is an interval that has the property that is very likely that the population…

Q: Calculate a two-sided 95% confidence interval for the population mean. b) In addition, predict the…

A: Given: The sample values given is as follows 24 28 27.75 27 24.25 23.5 26.25 24…

Q: Consider a study conducted in 2018, where researchers wanted to estimate the percentage of middle…

A: Given Information: Margin of error =3% Confidence interval is 95% Consider z value for significance…

Q: To create a confidence interval from a bootstrap distribution using percentiles, we keep the middle…

A: GivenA bootstrap distribution is distribution of many number of bootstrap statistics.The level of…

Q: What prerequisites should students have the knowledge of before calculating the confidence intervals…

A: Determine the prerequisites should students have the knowledge of before calculating the confidence…

Q: According to Thomson Financial, last year the majority of companies reporting profits had beaten…

A: a) Given that, n = 162 x = 31 Point estimate = sample proportion =  short = x / n = 31/162 = 0.1914…

Q: If we construct a 95% confidence interval estimate for the true proportion of all Minnesota school…

A: here given, n = 200 sample proportion  =20200 = 0.1 here for z-critical use excel command…

Q: What is the correct answer? The change in confidence level (increase, decrease, does not change,…

A: We want to tell you which one is the correct choice

Q: A survey of 2500 teen-agers noted that 60% of them are extensive internet users. With 90% confidence…

A:

Q: A Businessweek/Harris poll asked senior executives at large corporations their opinions about the…

A: Given: In current survey 230 of 500 answered yes x1: no. of people who said yes in current…

Q: Would it be reasonable to develop a confidence interval from these data to show the mean number of…

A: John is interested to know the number of hours children under 12 years if age watched TV per day.…

Q: An online poll of 810 adults found that 53% of the respondents think critical thinking should be…

A: Given info: An online poll of 810 adults found that 53% of the respondents think critical thinking…

Q: An online site presented this​ question, "Would the recent norovirus outbreak deter you from taking…

A: From the provided information, Sample size (n) = 34006 Proportion of people who responded “yes” to…

Q: A transportation planner wishes to estimate the proportion of commuters who drive to work within…

A: There is no specific information about the value of p. Hence, we can consider p as 0.5. A…

Q: The university surveyed 500 students and found that 150 of the students surveyed watch more than 5…

A: Given data, n=500 x=150 p=x/n =0.3 z-value at 90% confidence is Zc=1.645

Q: A Businessweek/Harris survey asked senior executives at large corporations their opinions about the…

A: Obtain the 95% confidence interval estimate for the difference between the proportions at the two…

Q: Dr. Soria surveyed 34,000+ college students about their rates of housing insecurity during the…

A: The proportion of college students experiencing housing insecurity at that time is 0.22, and the…

Q: According to Thomson Financial, last year the majority of companies reporting profits had beaten…

A: The number of companies fell short is 19.

Q: Why is it that when we increase our confidence level in a confidence interval that the interval gets…

A: Confidence inteval is calculated with mean/proportion and standard error. While the value of…

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.