Question: (construct the confidence intervals by hand, showing work. Use the T-Interval on the TI-84 to check) 1) A random sample of size n=40 is taken

(construct the confidence intervals by hand, showing work. Use the T-Interval on the TI-84 to check) 1) A random sample of size n=40 is taken in order to estimate the mean systolic blood pressure in a population of men over 30 years old. The sample mean is 123.8 and the sample standard deviation is s = 12.7 a) give a point estimate of the population mean. b) Construct (by hand, showing work) a 99% confidence interval for the population mean. c) Construct a 95% confidence interval for the population mean. 2) Assuming that the sample standard deviation will remain at 12.7, how large a sample would be needed in order to reduce the margin of error to 2.0?

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!

Why is it INCORRECT to state that the 95% confidence interval of 0.777

7/17/2016 Assessment 2 - MBAFP6018 Spring 2016 Section 01 ASSESSMENT 2 Estimating From Samples Details Attempt 1 Available Attempt 2 Attempt 3 Overview Use provided data files and scenarios to...

Lesson 7: Confidence Intervals NAME Lab Activity Answer the following questions showing all work. I strongly suggest using Minitab Express to answer questions when possible, as opposed to hand...

SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. Find the indicated probability. Round to four decimal places. 1) A car insurance company has...

ALL ABOUT STATS - NO EXPLANATION NEEDED 1. Which of the following summarizes the sample by a single number that is an estimate of the population parameter? (a) point estimate (c) estimate (b)...

MS1023 Business Statistics with Computer Applications MS1023 Business Statistics w/Comp Apps I Homework #3 - Use Red Par Score Form Chp. 7: Questions 1-50 1. Kristen Ashford purchased the subscribers...

Part 1: What does it mean to be 95% confident? Before we get started, it's very important to think carefully about the general format of the confidence interval. This format is: sample statistic +...

1 of 20 1.0 Points Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), "E" or "e" (used in scientific notation)....

The best definition for nonparametric statistics I can think of is when data does not fit inside the normal parameters of a normal distribution, it calls for the use of this statistical method....

2.5m Y=3m '0.4m find the Length of given figure Above Wall thickness=0.4m SolVe by Centerline Method and Long wall-Short Wall Method. tug

Jason is a single taxpayer who operates a business. In January, 2019 he purchased and placed into service $200,000 of 5-year class property and $300,000 of 7-year class property. Provide your...

7. Indicate whether each of the following types of account would normally have a debit balance or a credit balance: a. An asset account b. A liability account c. The owners capital account d. A...

On 1 March 2007 DB Limited issued R560 000 15% debentures at R98. The debentures were to be redeemed at par in four equal annual payments starting 28 February 2010. Required: Journalise the above...