In a study of the accuracy of fast food drive-through orders, Restaurant A had 226 accurate orders and 59 that were not accurate. a. Construct a 90% confidence interval estimate of the percentage of orders that are not accurate. b. Compare the results from part (a) to this 90% confidence interval for the percentage of orders that are not accurate at Restaurant B: 0.189

In a study of the accuracy of fast food drive through orders, restaurant A had 207 accurate orders and 66 that were not accurate. a.construct a 90% confidence interval estimate of the percentage of orders that are not accurate.

A genetic experiment with peas resulted in one sample of offspring that consisted of 441 green peas and 164 yellow peas. a. Construct a 90​% confidence interval to estimate of the percentage of yellow peas. b. It was expected that​ 25% of the offspring peas would be yellow. Given that the percentage of offspring yellow peas is not​ 25%, do the results contradict​ expectations?

Several years ago, 48% of parents who had children in grades K-12 were satisfied with the quality of education the students receive. A recent poll asked 1,035 parents who have children in grades K-12 if they were satisfied with the quality of education the students receive. Of the 1,035 surveyed, 497 indicated that they were satisfied. Construct a 90% confidence interval to assess whether this represents evidence that parents' attitudes toward the quality of education have changed. III What are the null and alternative hypotheses? Ho: P = 0.48 versus H₁: p 0.48 (Round to two decimal places as needed.) Use technology to find the 90% confidence interval. The lower bound is The upper bound is (Round to two decimal places as needed.) What is the correct conclusion? QA Since the interval contains the proportion stated in the null hypothesis, there is sufficient evidence that parents' attitudes toward the quality of education have changed. OB. Since the interval does not contain the…

An environmental group Oceana Canada analyzed 472 DNA samples of seafood purchased in four major Canadian cities. Laboratory results indicated the 53% of the seafood samples were labelled correctly. a. Calculate a 90% and 95% confidence interval.  b. Write an appropriate interpretation of the 90% and 95% confidence intervals. c. Draw a normal model and label the x-axis. Draw on your 90% and 95% confidence intervals.  d. In your own words (and in 1–2 sentences) explain the trade off between certainty and precision in the context of the question.

6. In the past, 70% of a garage's business was with former patrons. Clarence Wade, the owner of the garage, samples 600 repair invoices and finds that for 432 of them, the patron was a repeat customer. a. Develop a 90% confidence interval for the proportion of all current business that is with repeat customers.

Suppose a study was conducted of community colleges in California to determine the average cost of tuition for in-state students. The study consisted of 45 community colleges from California. Based on the sample data, the average tuition was $1,440 and the standard deviation was $267. Use this information to construct and interpret a 92% confidence interval for the true average tuition of all California community colleges. Make sure to check any relevant assumptions and state how you determined whether or not they were satisfied (Be as specific as possible). Make sure to type your confidence interval in an interval format with each bound rounded to 3 decimal places [i.e. (12.345, 45.678)]