I need typed answer with explanation k The standard deviation for a population is a = 15.5. A sample of 21 observations selected from thispopulation gave a mean equal to 140.05. The population is known to have a normal distribution.Round your answers to two decimal places.a. Make a 99% confidence interval for μ.b. Construct a 97% confidence interval for u.(ic. Determine a 95% confidence interval for μ.d. Does the width of the confidence intervals constructed in parts a through c decrease as the confidencelevel decreases?eTextbook and Medial

The given sample size is 21, sample mean is 140.05, and the population standard deviation is 15.5.

Answered: The standard deviation for a population…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Here are summary statistics for randomly selected weights of newborn girls: n= 36, x = 3180.6 g, s = 700.5 g. Use a confidence level of 95% to complete parts (a) through () below. D. Fu Ie margin oI erfor. E=237 g (Round to one decimal place as needed.) c. Find the confidence interval estimate of µ. (Round to one decimal place as needed.) (1,0) Clear all Check answer View an example Get more help- Help me solve this Next « Previous backspace & %24 %23 7 8 9. 3 4. e r 35
This is part B of the question, don't do this if you haven't done Part A! With the COVID-19 crisis, a manager is concerned with handling the amount of customers arriving to his store. The manager assumes that the number of customers, X, arriving per hour has a Poisson distribution with mean rate of 10 customers per hour. Use this distribution for exercises! Part A: 1. Use R to generate the pmf of X.2. Use R to plot the pmf of X.3. Give the probability that at least 11 customers arrive to the store in a given hour. Part B:4. There are 10 cards face down on a table and 3 of them are aces. If 5 of these cards are selected at random, what is the probability that at least 2 of them are aces?5. Defects in a certain type of aluminum screen appear on the average of one in 150 square feet. If we assume the Poisson distribution, nd the probability of at most one defect in 230 square feet.
The average A of three numbers a1, a2, a3.
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