5. A study of peach trees found that the average number of peaches per it525. The standard deviation of the population is 105 peaches per tree. Ascientist wishes to find the 80% confidence interval for the mean number ofpeaches per tree. How many trees does she need to sample to obtain an averageaccurate to within 12 peaches per tree?

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Answered: 5. A study of peach trees found that…

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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Similar questions

Find a 99% confidence interval for the population mean age of the Smurfs, if a sample of 50 smurfs have a mean age 49.7 years. The standard deviation is known to be 3.4 years. (by hand)
6. Construct the 95% confidence interval for the weights of adults in the town of Metaluna. A simple random sample of 39 weights was collected in Metaluna yielded an average 155 pounds. Assume that weights of Adults in Metaluna are normally distributed with a population standard deviation of 13.2 pounds.
1. The strength of a fiber is normally distributed with a known population standard deviation of 12 kg. An engineer sampled random pieces of fiber, and got the following data: 43, 54, 74.2, 47, 61.6, 80, 38, 40, 32 Find the 96% confidence interval for the mean strength of the fiber.
A firm is looking to employ a person as an engineer. Applicants of earlier years have standart deviation of 35.8. we pick random 75 people who apply to job this year and their mean result of the exam is 167.5. What is the 90 percent confidince interval for the mean of all applicants exam results?
We are interested in seeing if there is a difference between how long women and men spend shopping at Costko-K. Men spend an average of 48 minutes in our store with a standard deviation of 22 minutes. Women spend an an average of 39 minutes in our store with a standard deviation of 9 minutes. The sample size for men is 250 and the sample size for women is 300. Test the hypothesis at a 95% confidence level. Show your calculations and explain your findings.
On the Stanford-Binet test, the mean IQ is 100. A class of 21 kindergarten pupils were tested with a resulting mean of 92 and a standard deviation of 6.92. What is the standard error of the 90% confidence interval of the average IQ of the kindergarten pupils?
In a randoms sample of six people, the mean driving distance to work was 19.7 miles and the standard deviation was 6.1 miles. Assume the population is normally distributed and use the t-distribution to find the margin of error and construct a 90% confidence interval for the population mean u. Interpret the results.
1a) A study of peach trees found that the average number of peaches per tree was 525. The standard deviation of the population is 140 peaches per tree. A scientist wishes to find the 90% confidence interval for the mean number of peaches per tree. How many trees does she need to sample to obtain an average accurate to within 18 peaches per tree? b) Find tα/2 when n=25 for the 95% confidence interval for the mean. answer all parts 1a and 1b. Thanks.
A veterinarian wants to estimate the mean weight of a cat in their city. They take a random sample of 19 cats and found a mean of 10.9 lbs with a sample standard deviation of 1 lbs. Find the 95% confidence interval of the mean. Assume that the cat weights are normally distributed. Do not round in between steps. Round answers to at least 4 decimal places.
The wind on any random day in Bryan is normally distributed with a standard deviation of 5 mph. A sample of 16 random days had an average of 22mph. Find a 95% confidence interval to capture the true average wind speed.Use three decimals.
Find the lower limit of 95% confidence interval. An SRS of 36 students were taken from high schools in a particular state. The average test score of the sampled students was 60 with a standard deviation of 13.26. Give the lower limit of the interval approximation.
The sample mean and standard deviation for weights of 100 boxes are 12.05g and 0.1g respectively. Find a 90% confidence interval for the mean weight of the boxes.

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