A movie based on a best-selling novel was recently released. Six hundred viewers of the movie, 235 of whom had previously read the novel, were asked to rate the quality of the movie. The survey showed that 141 of the novel readers gave the movie a rating of excellent, while 248 of the non-readers gave the movie an excellent rating. ​a. Develop an interval estimate of the difference between the proportions of the two populations, using a .05 level of significance, as the basis for your decision.

Q: Nationally, patients who go to the emergency room wait an average of 5 hours to be admitted into the…

A: Note- As per our policy we can answer only the first 3 sub-parts of a question. If you want…

Q: The phenol concentration of wastewater was detemined from three (3) parallel determinations, giving…

A: Null hypothesis:   H0: µ=0.520   That is, the mean reference value is not statistically significant.…

Q: In a sample of 8 hip surgeries, the average surgery times was 131.5 minutes with a standard…

A: GivenMean(μ)=131.5standard deviation(σ)=20.9sample size(n)=8

Q: A random sample of 16 workers was taken from the workers of one of the factories, and it was found…

A: Given- A random sample of 16 workers was taken from the workers of one of the factories, and it was…

Q: is An independent samples t-test is appropriate for measuring differences between a selected sample…

A: One sample t test: One sample independent t test is a parametric test used to check for differences…

Q: Consider a sample of 8 hypertensive smoking adults. Their serum cholesterol level readings are as…

A: Margin of error of a point estimate provides the extent of accuracy with which the value of the…

Q: Find the sample size necessary for a 99% confidence level with maximal margin of error E = 2.00 for…

A: Solution

Q: A store that sells LPG claims that the mean weight of their mini-tanks are exactly 6-kgs as…

A: Given: sample size, n=15 α=0.10 X 5.78 5.98 6.01 6.09 6.23 5.89 6.00 6.03 6.10…

Q: Nationally, patients who go to the emergency room wait an average of 4 hours to be admitted into the…

A:

Q: Nationally, patients who go to the emergency room wait an average of 5 hours to be admitted into the…

A: Given: μ0=5 hours.n=11x¯=2.7 hours s=2.9 hoursα=0.05

Q: Nationally, patients who go to the emergency room wait an average of 7 hours to be admitted into the…

A: 1) From the given information, the population standard deviation is unknown.

Q: Nationally, patients who go to the emergency room wait an average of 5 hours to be admitted into the…

A: From the provided information, Sample size (n) = 10 Sample mean (x̅) = 8 Standard deviation (s) = 3…

Q: Nationally, patients who go to the emergency room wait an average of 6 hours to be admitted into the…

A: For this study, we should use : t test for a population mean

Q: From the scores in subject statistics for 8 students, it was found that the mean score is 73 and the…

A: We have given that,  Sample mean (x̄) = 73,  standard deviation (s) = 5.15 and sample size (n) = 8…

Q: The average pre-school cost for tuition fees last year was P17,250. The following year, 20…

A: Given that  Population mean = 17250 Sample mean = 16150 Sample size (n) = 20  Alpha = 0.10. By using…

Q: 2) Suppose that a manufacturer of laptop batternes claims that his product last more than 950 hours.…

A: Given : sample size, n = 45 sample mean, x̄ = 925 population standard deviation,σ=…

Q: A toothpaste manufacturer claims that children brushing their teeth daily with his company’s product…

A:

Q: A company that manufactures steel wires guarantees that the mean breaking strength (in kN) of the…

A: In statistical hypothesis testing, an error of type I is to rejecting the null hypothesis when it is…

Q: Find the sample size necessary for an 80% confidence level with a maximal margin of error E= 0.07…

A: Given that s.d =0.34,alpha =0.2,E =0.07 ( e) n= ?

Q: Nationally, patients who go to the emergency room wait an average of 5 hours to be admitted into the…

A: Given that, The 15 randomly selected patients who went to the emergency room at rural hospitals…

Q: Given that the sample proportion of Americans who are dissatisfied with the quality of education is…

A: Given information: p=0.53 M.E=0.05Confidence level=95% Use the excel formula, "=NORM.S.INV(0.975)"…

Q: im confused on this porblem

A: (a)The null hypothesis and alternative hypothesis:From the given information, the claim of the test…

Q: A survey of first time homeowners found that the sample mean annual income was $53,000. Assume that…

A:

Q: Suppose that a manufacturer of laptop batteries claims that his product last more than 950 hours.…

A: Given data : sample size, n = 45 sample mean, x̄ = 925.0 sample standard…

Q: A random sample of 700 units from a large consignment showed that 200 were damaged. Find (i) 95% and…

A: Given Here, A random sample of 700 units consignment showed that 200 were damaged. we want i) 95%…

Q: A cellular telephone manufacturer that entered the post-regulation market quickly has an initial…

A: Solution: Given infformation: Margin of error = E = 0.01 Confidence level= C = 90%= 0.90 Assumed…

Q: Nationally, patients who go to the emergency room wait an average of 7 hours to be admitted into the…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: A cellular telephone manufacturer that entered the post-regulation market quickly has an initial…

A:

Q: Nationally, patients who go to the emergency room wait an average of 4 hours to be admitted into the…

A: The random variable waiting time follows normal distribution. The sample size is 12. The sample mean…

Q: A leasing firm claims that the mean number of miles driven annually, , in its leased cars is less…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: Let’s suppose the normally distributed population of women in Vigo County, Indiana has a mean…

A:

Q: Nationally, patients who go to the emergency room wait an average of 7 hours to be admitted into the…

A: From the provided information, Sample size (n) = 15 Sample mean (x̄) = 7.4 Sample standard deviation…

Q: In a random sample of ten ​people, the mean driving distance to work was 23.2 miles and the standard…

A: Provided information is ; Sample size(n) =10  Mean(μ) = 23.2 Sample standard deviation(s) = 5.3…

Q: A real estate company appraised the market value of 20 homes in a regional suburb in Western…

A:

Q: A hospital president claims that the average Salary of registered nurses at her hospital is more…

A:

Q: An electrical contractor has concluded that the average home uses at least 500 yards of electrical…

A:

Q: (a) A daily sample of 30 items was taken over a period of 14 days in order to establish control…

A:

Q: Nationally, patients who go to the emergency room wait an average of 6 hours to be admitted into the…

A: (1)   Determine what type of test is used for testing for problem.   The type of test is used for…

Q: Nationally, patients who go to the emergency room wait an average of 5 hours to be admitted into the…

A: 1. The population mean is to be compared with a suggested value here, when the population standard…

Q: The mean noise level of 20 randomly selected areas designated as “casualty doors” was 63.1 dBA, and…

A: Given that  Level of significance =0.05 Sample sizes n1=20 , n2=24

Q: Nationally, patients who go to the emergency room wait an average of 7 hours to be admitted into the…

A: Given,sample size(n)=11sample mean(x¯)=8.6standard deviation(S)=1.7α=0.01

Q: In a random sample of eleven ​people, the mean driving distance to work was 18.1 miles and the…

A: Given information Sample size (n) = 11 Sample mean x̅ = 18.1 miles Standard deviation (s) = 7.6…

Q: Do adults (age 20–45) with children and adults without children have the same distribution of type…

A: Null and alternative hypotheses: Null hypothesis: Null hypothesis is a statement which is tested for…

Q: One method for measuring air pollution is to measure the concentration of carbon monoxide, or CO, in…

A: Solution: The margin of the error for the confidence interval for the can be calculated by using the…

Q: . What sample size would be required to estimate the proportion of all hospital referrals to the…

A: Sample Size: The formula for the sample size is as follows: Here, zα/2 is the critical value at 95%…

Q: For a sample of 60 women taken from a population of over 5,000 enrolled in a weight- reducing…

A: Given, n = 60 x¯ = 101, s = 42, α=0.02

Q: One method for measuring air pollution is to measure the concentration of carbon monoxide, or CO, in…

A: The margin of error for population mean is positively related to the confidence level and negatively…

Q: For this study, we should use Select an answer z-test for a population proportion t-test for a…

A: 1. The 12 randomly selected patients who went to the emergency room at rural hospitals waited an…

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.