Account Da 5 h boa rd Courses Calendar History |,'.| TimelyCare % Studio Iii Lil . 'I-l I elcamino.instructure.com Fall Semester 2022 Home Syllabus An nouncements Modules TechConnect Zoom Discussions Assignments Grades @ Panopto Video Files Quizzes People Pages NetTutor ECC Connect 1) In a simple random survey of 89 teachers who taught college statistics. 73 said that it was the most sah'sfying, most enioyable course they had ever taught. In order to construct a 98% condence interval estimate of the proportion of all community college statiscs teachers who feel this way. let's following the steps: a) What is the critical value? l3) What is the margin of error? c) Construct a 98% condence interval. d] interpret the above condence interval. (You must follow the format from the example of instructor's video. Other way of interpretation will result in little credit or no credit.) 2) To determine the mean cost of groceries in a certain city. an identical grocery basket of food is purchased at each store in a random sample of ten stores. It the average cost is $47.52 with a standard deviation of $1.59. To nd a 98% condence interval estimate for the cost of these groceries in the city. (Assume that the population is normally distributed]. let's complete the following steps: a) What is the critical value? b) What is the margin of error? c) Construct a 98% condence interval. @MEOOunz-a,\"@ NOV 5 22403.0 vn