In your STOR 155 class, the professor returns Midterm 2 and claims that the average score was 83 out of 100 with a standard devlation of 7 points. When the professor steps out of the room, you quickly select a simple random sample of students (all students are present that day) and note their scores: 68, 75, 88, 86, 77, 79, 65, 77, 85, 71 a) You strongly suspect that the professor is overstating the average so that students will blame themselves If they have a low Midterm score. State the null and alternative hypotheses for the appropriate test of significance at a=0.05. Ο H, : μ 83, Η,: μ < 83 O Ho: H = 83; H,: u # 83 Ο H9 μ 83; H,, μ>83 O Ho: H > 83; H,:H = 83 Ο H , μ< 83; H,, μ- 83 b) Find the z-statistic and P-value for these data. Give z to two decimal places and P to four decimal places. and P = c) What is the appropriate decision based on P? Select all that apply. O we should reject the null hypothesis in favor of the alternative. O we should fail to reject the null hypothesis in favor of the alternative hypothesis. O we can say with certainty that the null hypothesis is not true.

In your STOR 155 class, the professor returns Midterm 2 and claims that the average score was 83 out of 100 with a standard devlation of 7 points. When the professor steps out of the room, you quickly select a simple random sample of students (all students are present that day) and note their scores: 68, 75, 88, 86, 77, 79, 65, 77, 85, 71 a) You strongly suspect that the professor is overstating the average so that students will blame themselves If they have a low Midterm score. State the null and alternative hypotheses for the appropriate test of significance at a=0.05. Ο H, : μ 83, Η,: μ < 83 O Ho: H = 83; H,: u # 83 Ο H9 μ 83; H,, μ>83 O Ho: H > 83; H,:H = 83 Ο H , μ< 83; H,, μ- 83 b) Find the z-statistic and P-value for these data. Give z to two decimal places and P to four decimal places. and P = c) What is the appropriate decision based on P? Select all that apply. O we should reject the null hypothesis in favor of the alternative. O we should fail to reject the null hypothesis in favor of the alternative hypothesis. O we can say with certainty that the null hypothesis is not true.

Name: In your STOR 155 class, the professor returns Midterm 2 and claims th
Uploaded: 2024-03-20T07:06:27.000Z
Channel: Bartleby
Description: In your STOR 155 class, the professor returns Midterm 2 and claims that the average score was 83 out of 100 with a standard deviation of 7 points. When the professor steps out of theroom, you quickly select a simple random sample of students (all st

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Solve last part
The first pic is the question, since I’ve been receiving some incorrect answers from the tutors, I included an example problem in the second pic
A coach is interested in how many slam dunks the average college freshman at his university can do. Ten volunteers from the senior class step forward. After observing their performance, the coach concluded that college seniors can do an average of 10 slam dunks in a row without missing. what is the sample? what is the population?
A box contains 5 balls. Two are numbered 3, one is numbered 4, and two are numbered 5. The balls re mixed and one is selected random. After a ball is selected, its number is recorded. Then it replaced. If the experiment is repeated many times, find the mean of the numbers on the balls(round off uour final answer to decimal places
It currently takes users a mean of 2626 minutes to install the most popular computer program made by RodeTech, a software design company. After changes have been made to the program, the company executives want to know if the new mean is now different from 2626 minutes so that they can change their advertising accordingly. A simple random sample of 5151 new customers are asked to time how long it takes for them to install the software. The sample mean is 24.924.9 minutes with a standard deviation of 2.72.7 minutes. Perform a hypothesis test at the 0.0250.025 level of significance to see if the mean installation time has changed. Step 1 of 3 : State the null and alternative hypotheses for the test. Fill in the blank below. H0Ha: μ=26: μ⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯26
Consider a random sample of 300 students in a university, 75 of them declared that they like playing football. Compute a point estimate of the proportion of all students who would like to play football.
Suzette does an experiment where she collects date from 5 women snd obtains the scores: 4, 4, 5, 2, 5. She hypothesizes that the population mean for the population from which these scores are drawn is 3. She wants to test whether this hypothesis is true. What is the alternative hypothesis she is testing?
Suppose that there is a 15% chance that a randomly selected Stat 240 student wears glasses. Out of a class with 35 students, what is the minimum number of students wearing glasses for the percent to be considered unusually high? Thanks!
suppose you select a simple random sample of 75 douglas college student and you find that 8 are left handed what is the best point of estimate of p, the proportion of all douglas college students who are left handed
Solve last part
In a statistics class, 10 scores were randomly selected, and the following results were obtained: 74, 73, 77, 77, 71, 68, 65, 77, 67, 66 What is the 90thpercentile? What is the first quartile (or 25thpercentile)? What is the third quartile (or 75thpercentile)?
There are 3 parts to this question!! Answer each part in a separate blank! The average price per square foot for a home in a large county in a certain state is $225. The council of a country town wonders if the mean price of the homes in their town is less than the mean price of the homes in the county. The town council selected a random sample of 9 homes that have recently sold in their town. They found the price per square foot and want to perform a hypothesis test at the 0. 05 significance level. The data is listed below. 221.4 213.1 219.1 229.6 220.7 224.4 221.6 217.8 223.9 1. Calculate the test statistic and the P-value. 2. What is the decision at the given significance level? 3. What do you conclude?