QUESTION 5 In a random and independent sample of 4000 students 35% of them were in favor of more online coures. What is the value of the lower bound ( 95% confidence interval level)? Write your answer as a decimal.

Q: The GPAs of nursing students (p1) were compared to GPAs of student-athletes (p2) were compared. Of a…

A: The random variable is GPA. It follows normal distribution. There are two populations which are…

Q: Question 7: Assuming all other factors are unchanged, a decrease of sample size will have what…

A: Assuming all other factors are unchanged, a decrease of sample size will have what result in the…

Q: Identify the t -scores for a 90% confidence interval if the sample size is 25?

A: Givensample size(z)=25α=1-0.90=0.10α2=0.05

Q: Question 2. Ms. Maria Wilson is considering running for mayor of Bear Gulch, Montana. Before…

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

Q: In a random sample of 900 individuals, the proportion of regular vitamin users is found to be 0.20.…

A: It is given that the two-sided 95% confidence interval is estimated for proportion.

Q: Males and females were asked what they would do if they received a $100 bill in the mail that was…

A: For Males : The sample size , N1=70N_1 = 70 Those who said Yes ,  X1=55X_1 = 55X1​=55:…

Q: The value of a for a 98% confidence interval would be ______. 1. 0.2 2. 0.02…

A:

Q: If a sample is used to estimate a population proportion p. What is the 80% confidence interval for…

A: Given  If a sample is used to estimate a population proportion p. What is the 80% confidence…

Q: What is the relationship between confidence intervals and hypothesis testing? When testing Ho: μ =…

A: Given: Confidence interval=90% Level of significance, a= 1-0.90=0.10

Q: An airline company wishes to know the proportion of business class travelers flying the Kuala…

A: Given information In random sample of 350 passengers and 190 are business class passengers. That is…

Q: What is meant by saying that a 1-a confidence interval is a. exact?b. approximately correct?

A: a.Confidence Interval:Confidence interval is the interval estimate of the population parameter. It…

Q: Which of these facts would tell us that the pamphlet needs to be updated? If an appropriate…

A:

Q: What is the one exception to using the z score for confidence intervals?

A:

Q: Other than the typical 90%, 95% and 99% confidence intervals, we may want to work with any other…

A: Note: This critical value calculated from standard normal distribution table at level of…

Q: f n = 243 and ˆpp^ = 0.267, construct a 95% confidence interval. Give your answers to three…

A: Given, (1-α)100% = 95%  α= 0.05 Zα2 =Z0.025  = 1.96 Using Excel function=NORMSINV(0.025)

Q: Part 1 of 2 (a) Find the margin of error for a 99% confidence interval for u. Round the answer to at…

A:

Q: If a 90% confidence interval for the mean is found to be (1.25,4.75) using a sample of n=100, find…

A:

Q: The P-value for a two-sided test of the null hypothesis H0: μ = 10 is 0.03. (a) Does the 95%…

A: Given data  Claim :mu=10 P value for two tailed test = 0.03   We reject Ho if pvalue < alpha

Q: Explain why a 100% confidence interval for µ can never be constructed from a sample.  Hint:  What…

A:

Q: If n=560 and p^ (p-hat) =0.8, find the margin of error at a 90% confidence level Give your answer…

A: Obtain the margin of error at 90% confidence interval.   The margin of error at 90% confidence…

Q: Among the 34,506 people who​ responded, 63​% answered​ "yes."   Use the sample data to construct a…

A: Given data: Total number of people who responded for the question presented by online site, n =…

Q: If a 95% confidence interval contains 0, so will the 99% confidence interval. True False3

A: Solution: As the confidence level increases the margin of error increases. This leads to the…

Q: 90% confidence interval is narrower than a 95% confidence interval using the exact same data.…

A: Conditions on confidence interval:   As the confidence level increases, width of the confidence…

Q: QUESTION 4 In a random and independent sample of 4000 students 35% of them were in favor of more…

A: MOE=Zα/2p(1-p)n Zαl2=1.645 p=0.35 and n=4000

Q: Two 95 percent confidence intervals will be constructed to estimate the difference in means of two…

A:

Q: After reporting the results from a formal hypothesis test, it is often likely that statisticians…

A: We construct a confidence interval on the samples that will be used to test the hypothesis.There is…

Q: Thirteen out of 147 randomly selected faculty members who were surveyed at a community college…

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Q: A magazine provided results from a poll of 1500 adults who were asked to identify their favorite…

A: As we know confidence interval interpreted that we are that percent confident that it will contain…

Q: Question no 5: a survey is conducted from male and female customers on their preference for green…

A: Given information: In a survey, males and females were asked there preference for green products.…

Q: (a) If researchers decide on a 4.2% margin of error for a 95% confidence interval. What sample size…

A: From provided information, Sample proportion is (p̂) = 50% i.e. 0.5 The sample size can be…

Q: Is this correct or incorrect? Why? A 95% confidence interval is always preferable over a 90%…

A: Given:    A 95% confidence interval is always preferable over a 90% confidence interval because a…

Q: A genetic experiment with peas resulted in one sample of offspring that consisted of 445 green peas…

A: Given, the number of sucesses, x =154           sample size, n = 445 + 154 = 599 Confidence inteval…

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: When finding confidence intervals for one population mean, if you want a 95% confidence interval,…

A: A critical value is the number on the borderline separating sample statistics that are likely to…

Q: A 99% confidence interval is smaller in size than a 95% confidence interval because it is more…

A: Given  A true or false question based on confidence interval.

Q: A 95% confidence interval is constructed in order to estimate the proportion of adults who own an…

A:

Q: a random and independent sample of 4000 students 35% of them were in favor of more online courses.…

A: It is given that n =4000 and p value is 0.35.

Q: Identify the t- scores for a 99% confidence interval if the sample size is 70?

A: We have to find critical value.

Q: Which of the below is the correct calculation of the 95¥% confidence interval?

A: Given that sample size n = 670 And sample proportion = 0.85 The critical value of Z at 95%…

Q: two 95 percent confidence intervals will be constructed to estimate the difference in means of two…

A: Solution: The confidence interval for the difference in means calculated by using the formula:

Q: Give a 95​% confidence interval for the true proportion of those from their entire mailing list who…

A: Given,Sample size (n)=1,00,000No. of donotions recived (r)=4887Proportion P^=xr=48871,00,000=0.04887…

Q: In a study of the nicotine patch, 21% of those who used the patch for 2 months reported no smoking…

A: Solution: It is given that, 21% of those who used the nicotine patch for 2 months reported no…

Q: Does your confidence interval capture 15 pounds? Answer this question in one sentence. If there…

A:

Q: Question 1: The GPAs of nursing students (p1) were compared to GPAs of student-athletes (p2) were…

A: Given Information : The GPAs of nursing students (p1) were compared to GPAs of student-athletes (p2)…

Q: At her job, Jackie has been working at her job for a few years now and feels like she, as well as…

A: Given: Margin of error (E) = 5% = 0.05 Confidence level = 99%   Using z-table, the critical value…

Q: An economist at the Florida Department of Labor and Employment needs to estimate the unemployment…

A: Givenp^=0.46sample size(n)=529

Q: If a 95% confidence interval is reported as (30, 100) for the average time spent (hours) in online-…

A:

Q: Identify the y-score for a95% confidence interval if the sample size is 50.

A: The confidence level is 0.95.

Q: If a sample of 100 people contains 15 left-handed: (a) Compute a 95% confidence interval for the…

A: Confidence interval: It is an approximate range of values within which the unknown parameter lies.…

Q: If the confidence interval would only contain positive values, what would be your interpretation of…

A: The true value of the parameter range is calculated using the confidence interval. If the 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.