he local bakery bakes more than a thousand 1-pound loaves of bread daily, and the weights of these loaves varies. The mean weight is 0.9 lb. and 1 oz., or 437 grams. Assume he standard deviation of the weights is 21 grams and a sample of 45 loaves is to be randomly selected. (a) This sample of 45 has a mean value of x, which belongs to a sampling distribution. Find the shape of this sampling distribution. O skewed right O approximately normal O skewed left O chi-square (b) Find the mean of this sampling distribution. (Give your answer correct to nearest whole number.) grams (c) Find the standard error of this sampling distribution. (Give your answer correct to two decimal places.) (d) What is the probability that this sample mean will be between 429 and 445? (Give your answer correct to four decimal places.) (e) What is the probability that the sample mean will have a value less than 433? (Give your answer correct to four decimal places.) (f) What is the probability that the sample mean will be within 5 grams of the mean? (Give your answer correct to four decimal places.)

he local bakery bakes more than a thousand 1-pound loaves of bread daily, and the weights of these loaves varies. The mean weight is 0.9 lb. and 1 oz., or 437 grams. Assume he standard deviation of the weights is 21 grams and a sample of 45 loaves is to be randomly selected. (a) This sample of 45 has a mean value of x, which belongs to a sampling distribution. Find the shape of this sampling distribution. O skewed right O approximately normal O skewed left O chi-square (b) Find the mean of this sampling distribution. (Give your answer correct to nearest whole number.) grams (c) Find the standard error of this sampling distribution. (Give your answer correct to two decimal places.) (d) What is the probability that this sample mean will be between 429 and 445? (Give your answer correct to four decimal places.) (e) What is the probability that the sample mean will have a value less than 433? (Give your answer correct to four decimal places.) (f) What is the probability that the sample mean will be within 5 grams of the mean? (Give your answer correct to four decimal places.)

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

Recent studies have shown that about 16% of American adults fit the medical definition of being obese. A large medical clinic would like to estimate what percentage of their patients are obese, so they take a random sample of 400 patients and find that 52 are obese. Suppose that in truth, the same percentage holds for the patients of the medical clinic as for the general population, 16%. Find the mean of the sampling distribution of p̂.
The annual salary for one particular occupation is normally distributed, with a mean of about $134,000 and a standard deviation f about $21,000. Random samples of 35 are drawn from this population, and the mean of each sample is determined. Find the mean and standard deviation of the sampling distribution of these sample means. Then, sketch a graph of the sampling distribution. The mean is μ =, and the standard deviation is = (Round to the nearest integer as needed. Do not include the $ symbol in your answers.)
Between 2000 and 2010, Major League Baseball teams have an average of 1.07 home runs per game. Some statisticians have suggested that there is a different average number of home runs per game hit today than in year's past. To test this claim, we collected a random sample of 91 baseball games in 2017 and found that 142 home runs were hit with a sample standard deviation of 1.89. (a) Perform a six-step hypothesis test to see if the average number of home runs in 2017 differs from 1.07. Use a = 0.05. (b) Use the same Ho and H₂ that you use in part (a). Does the conclusion change when you shift the level of confidence to a = = 0.01?
The mean wage per hour for all 4000 employees working at a large company is RM 10.50 with a standard deviation of RM 5.30. Let x be the mean wage per hour for a random sample of certain employees selected from this company.
The annual salary for one particular occupation is normally distributed, with a mean of about $132,000 and a standard deviation of about $16,000. Random samples of 26 are drawn from this population, and the mean of each sample is determined. Find the mean and standard deviation of the sampling distribution of these sample means. Then, sketch a graph of the sampling distribution.
A population has a mean = 73 and a standard deviation σ = 22. Find the mean and standard deviation of a sampling distribution of sample means with sample size n=240. 1x = (Simplify your answer.)
For a population that has a standard deviation of 22, figure the standard deviation of the distribution of means for samples of size (a)2, (b)4, (c)5 and (d)10.
A population has a mean µ = 87 and a standard deviation o=27. Find the mean and standard deviation of a sampling distribution of sample means with sample size n = 81. (Simplify your answer.)
A population has a mean u= 81 and a standard deviation o = 21. Find the mean and standard deviation of a sampling distribution of sample means with sample size n = 255. (Simplify your answer.) (Type an integer or decimal rounded to three decimal places as needed.)
Suppose that we will randomly select a sample of 64 measurements from a population having a mean equal to 20 and a standard deviation equal to 4. Find the mean and the standard deviation of the sampling distribution of the sample mean . (Round your answer to 1 decimal place.)
The weights of people in a certain population are normally distributed with a mean of 159 lb and a standard deviation of 24 lb. Determine the sampling distribution of the mean for samples of size 5.