Question: Suppose we want a 90% confidence interval for the average amount of time (in minutes) spent per week on homework by the students in a

Suppose we want a 90% confidence interval for the average amount of time (in minutes) spent per week on homework by the students in a large introductory statistics course. The interval is to have a margin of error of 2 minutes, and the amount spent has a normal distribution with a standard deviation = 30 minutes.

My answer was based on the formula estimate+/- margin of error, but I had it wrong. Would you mind delivering your answer with a a detailed explanation so I know how to solve these problems?

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Mathematics Questions!

Suppose we want a 90% confidence interval for the average amount of time (in minutes) spent per week on homework by the students in a large introductory statistics course at a large university.The...

You own a small storefront retail business and are interested in determining the average amount of money a typical customer spends per visit to your store. You take a random sample over the course of...

2. There are 24 students enrolled in an introductory statistics class at a small university. Asan in-class exercise the students were asked how many hours of television they watcheach week. Their...

Student: allan cranford Date: 9/7/16 Instructor: Basu Dipanker Course: MAT-240-Q6622-16EW6 Assignment: 1-3 MyStatLab: Module One Problem Set 1. The following data represent the percent of owners of...

Use these links to solve n QUESTION 1 4 points In order to estimate the mean time students spend on their homework each night, a professor randomly selects 25 students and finds the standard...

show work for all choice problems. 1. Suppose a 95% confidence interval for turns out to be (1,000, 2,100). To make more useful inferences from the data, it is desired to reduce the width of the...

I need the following answers solutions from the attached exercise which is Chapter # 9 Estimation of Parameters. Books is Introduction to Statistics (3rd Edition) by Ronald E.Walpole_ for reference....

Hypothesis Testing- 2 samples One of the questions in a study of marital satisfaction of dual-career couples was to rate the statement, "I'm pleased with the way we divide the responsibilities for...

1. An aptitude test was given to a random sample of 228 people intending to become data-entry clerks. The results are shown below, where x is the score on a 10-point scale and f is the frequency of...

Prove that if DABCD is a convex quadrilateral, then a(OABCD)

Apply Euler's method twice to approximate the solution to the initial value problem on the first with step size h = 0.25, then with step size h=0.1. Compare the interval 0, [0.12]. 1...

4 of 2 6 possibie This question: 4 point ( s ) possible Submit Find the average rate of change for the function over the given interval. y = 5 x 7 between x = - 1 and x = 0 A . - 2 8 B . - 1 6 C . 1...

Which compound is more soluble in an acidic solution than in a neutral solution (A) PbBr, (B) CuCl (C) AgI (D) BaF,

The following Absorbance vs concentration of nitrite graph is obtained for a set of data: Absorbance Vs Concentration y = 1.6628x +0.0373 R2 = 0.9893 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0.2 0.4 0.6 0.8...

Among the components of the Empathy Map, which is most important, and which is less for design thinking problem-solving? Why? (word limit 200)

2. What types of information are we collecting?

5. How quickly can we manage to collect the information?

3. Tactical/strategic information.