3. You plan to conduct a survey to find out what proportion of the workforce has two or more jobs. You decide on a 98% confidence level and want the estimate of the proportion to be accurate within 48. We have no reliable estimate of the population proportion. How many workers should be surveyed to meet your

Q: You are a manager for a local convenience store. You want to determine what proportion of your…

A: We have given that,  Margin of error (E) = 5.50% and confidence level = 90% Then,  We will find the…

Q: Explain when you would use the paired-samples procedure to make confidence intervals  and test…

A:

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

A: Margin of Error(E)=0.05For 99% confidence level Zα2=2.576 Formula; E=Zα2×(p×(1-p)n)

Q: 4. A newspaper reports on the topics that teenagers most want to discuss with their parents. The…

A: Here, the proportion of all teenagers who want more family discussions about religion 0.30 and the…

Q: What are the upper and lower limits and the width of CI if you change the confidence level to 99% M…

A: Formula : CI=point estimate ± ME

Q: 6. A researcher wishes to estimate the percentage of adults who support abolishing the penny. What…

A: a) Given, Margin error (E) = 0.03 Sample proportion = 0.34   The objective is to find the sample.…

Q: If we want to be within 0.02 of the true proportion of homes that have a direct television receiver…

A: The population proportion is 82%, the confidence level is 98% and estimate is within 0.02.…

Q: It is known that the population range equals 60. With a 95% confidence level, the sample size that…

A:

Q: (b) What sample size should be obtained if he wants to be within 4 percentage points with 95%…

A: B) It is given that margin of error (E) is 0.04 and the confidence level is 0.95.

Q: If n=16, x(x-bar)=43, and s=9, find the margin of error at a 99% confidence level Give your answer…

A: The random variable X follows normal distribution. The sample size is 16. The sample mean is 43. The…

Q: 20 The following is an interval estimate with a 95% confidence level for the proportion of Indiana…

A:

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

A: It is given that margin of error (E) is 0.04 and the confidence level is 99%.Here,

Q: In a survey, people were asked whether they thought sun went around the planet Earth or vice versa.…

A: (a)   Obtain the proportion of people in the survey who believed the sun went around earth. The…

Q: If you knew that a study reported that 73% of pre-kindergarten children ages 3 to 5 whose mother had…

A:

Q: Suppose the 90% confidence interval for a population mean is (20, 55). What is the point estimate…

A:

Q: 3. The American Medical Association (AMA) wishes to determine the percentage of obstetricians who…

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

Q: A television sports commentator wants to estimate the proportion of citizens who​ "follow…

A: Solution: a. From the given information, confidence level is 0.96, p=0.48 and E=0.03.

Q: A Florida newspaper reported on the topics that teenagers most want to discuss with their parents.…

A: Given that there are 533 teenagers and the percentage of more family discussions about school is 37%…

Q: If α = 0.05, then what is the confidence level?

A: Given: α = 0.05   we know that, Confidence level+ α = 1

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

A: GivenMargin of error(E)=0.03confidence level(c)=99%α=1-0.99=0.01α2=0.05zα2=z0.05=1.6449   (from…

Q: A research institute poll asked respondents if they felt vulnerable to identity theft. In the​ poll,…

A:

Q: 11. A television station surveys 200 customers and finds that 23% of customers watch the evening…

A: Margin of error = z*√(pq/n) Where z= z value            n=no of customer            q=1-p…

Q: 10. You want to estimate the proportion of all college students who traveled during spring break.…

A:

Q: Suppose we want to estimate the proportion of teenagers (aged 13-18) who are lactose intolerant. If…

A: According to the provided information, The z score at 95% confidence interval from the standard…

Q: If 73.3% of the 45 students in our class are under the age of 20, find the 95% confidence interval…

A: The provided information are:

Q: What are the upper and lower limits and the width of the CI if you change the confidence level to…

A: Given that M = 130 SD = 15 N = 49 We have to find the upper and lower limits for the confidence…

Q: Do People Think the Sun Goes around the Earth? In the 2018 General Social Survey, people were asked…

A: According to our policy we can answer only first three part for remaining please repost the…

Q: 4. The Department of the Treasury is interested in finding out what proportion of people support…

A: Given that  Population proportion p=15%=0.15 Margin of error =E =2%=0.02 95% confidence.  NOTE:-…

Q: 7.38 Potential insurance fraud? Insurance adjusters are concerned about the high estimates they are…

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

Q: 4.An internet service provider wishes to estimate, to within one percentage error, the current…

A: Given : Margin of error (E) = 1% = 0.01 Confidence level = 85% So , significance level (α) = 15% =…

Q: Suppose we want to estimate the proportion of teenagers (aged 13-18) who are lactose intolerant. If…

A: Given information Error = 3% = 0.03 Confidence level = 0.95

Q: Using a confidence level of 99%, estimate the proportion of all spectators that travelled to the…

A: It is given that Sample size n = 400 Number of spectators that travelled to the arena by car, X =…

Q: 4. How large a sample must be taken to estimate the proportion of households in which a cell phone…

A: In probability theory, a normal distribution is a type of continuous probability distribution for a…

Q: ce interval for the mean is (44 ≤ μ ≤ 98), a) What is the point estimate?

A: a) The Point estimate can be calculated as: Point estimate=LowerLimit+UpperLimit2=44+982=71

Q: A magazine provided results from a poll of 500 adults who were asked to identify their favorite pie.…

A: From the given information, The percentage of chocolate pie is 14%. There are 500 respondents.…

Q: The Nielson television ratings used a sample of 2,000 homes to estimate the proportion of all homes…

A:

Q: Suppose a 90 percent confidence interval to estimate a population proportion was calculated from a…

A: Solution: From the given information, the sample proportion is 18% and a margin of error is 4…

Q: The relationship between sample size and the width of a confidence interval may be explained by the…

A: The relationship between sample size and the width of a confidence interval may be explained by the…

Q: It is believed that 25% of U.S. homes have a direct satellite television answers up to a whole…

A:

Q: If a confidence interval for the mean is (38≤μ≤89)(38≤μ≤89), a) What is the point estimate?    b)…

A: Given,   Lower bound = 38​ Upper bound = 89

Q: 12) Find the sample size need to find the Population Proportion if the margin of error is 5%, the…

A:

Q: (c) If the confidence levels were 98% rather than 80%, would the margin of error be larger or…

A: The confidence levels are 98% and 80%.

Q: If we want a 95% confidence interval for proportion within 3%.  How large a sample do we need?…

A: We have to find sample size for given data .

Q: A magazine provided results from a poll of 500 adults who were asked to identify their favorite pie.…

A: Solution: Given information: n= 500 Sample size Here we need to interpret the meaning of each…

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny What size…

A:

Q: A school administrator wants to know what proportion of the approximately 80,000 teachers in their…

A: Given: x=55n=100

Q: If n=23, x(x-bar)=47, and s=3, find the margin of error at a 98% confidence level Give your answer…

A: Margin error is the difference between the estimated value and the original value. Here the critical…

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

A: a) Given that: p= previous estimate = 32% =0.32 e= error= 3%=0.03 z=critical value for confidence…

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.