Archeologists have studied sizes of Egyptian skulls in an attempt to determine whether breeding occurred between different cultures. Listed below are the widths (mm) of skulls from 150 A.D. Construct a 90% confidence interval estimate of the mean skull width127.7 138.2 125.9 132.3 142.9 135.3 138.8 128.9mm pmm(Round to two decimal places as needed.)ww

Given,sample size(n)=8degrees of freedom(df)=n-1df=8-1=7

Answered: Archeologists have studied sizes of…

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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Archeologists have studied sizes of Egyptian skulls in an attempt to determine whether breeding occurred between different cultures. Listed below are the widths (mm) of skulls from 150 A.D. Construct a 99% confidence interval estimate of the mean skull width. 127.6 138.3 126.2 131.7 142.7 135.3 138.6 128.9
A survey of the opinions of property owners about a street widening project was taken to determine whether the resulting opinion was related to the distance of front footage. A randomly selected sample of 100 property owners was contacted and the results are shown below. Opinion Front-Footage For Undecided Against Under 45 feet 12 4 4 45 – 120 feet 35 5 30 Over 120 feet 3 2 5 What is the computed value of chi-square? 5.4787 4.9985 9.2784 7.9842 11.0355
Archeologists have studied sizes of Egyptian skulls in an attempt to determine whether breeding occurred between different cultures. Listed below are the widths (mm) of skulls from 150 A.D. Construct a 90% confidence interval estimate of the mean skull width. 128.4 138.2 125.8 131.8 143.2 134.7 138.8 128.7
A sample of the length in inches for newborns is given below. Assume that lengths are normally distributed. Find the 99% confidence interval of the mean length. Length 15.2 15.6 20.6 16.3 15.4 17.4 18.1 20.6 18.6 20.7
A machine produces glass with a nominal thickness of 4mm. In fact the thickness is a Normal random variable with mean 4.168mm and standard deviation 0.12mm. The thickness in mm which 5% of panes exceed is (2 d.p.)?
A sample of 20 bags of mulch had a mean weight of 52 pounds with a standard deviation of 3.8 pounds. Find the 95% confidence interval of the true mean. Show all your work for or explain how you obtained your answer in the space provided below.
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.
A mean undergraduate cost for tuition , fees , room , and board for four-year institutions was 26,489 for a recent academic year. Suppose that the population standard deviation equals 3, 204 and 36 four year institutions are randomly selected .find the probability that the sample mean cost for these 36 schools is between 24,000 and 26, 000.find the corresponding area for the z values.
Assume that a sample is used to estimate a population mean. Find the 90% confidence interval for a smaple of size 46 with a mean of 68.5 and a standard deviation of 6.6. Enter the answer as an open-interval (parentheses) accurate to one decimal place (because the sample statistics are reported accurate to one decimal place).
You measure 39 textbooks' weights, and find they have a mean weight of 60 ounces. Assume the population standard deviation is 4.4 ounces. Based on this, construct a 90% confidence interval for the true population mean textbook weight.Give your answers as decimals, to three placesError = ? oz.Interval = ? oz. < μ < ? oz.
The mean diameter of a ball bearing produced by a certain manufacturer is 0.60 cm with a standard deviation of 0.04 cm. A sample of 25 ball bearings is randomly selected from a production run. The sample had a mean of 0.60008 and a median 0.60333. What is the standard error for the sample mean? O A. 0.00032 O B. 0.008 O C. 0.0016 O D. 0.00008 O E. 0.00333
A nursery sells lime trees that have normally distributed heights with a mean of 2 ft and a standard deviation of 0.3 ft. Find the probability that a randomly selected tree is between 1 and 2 ft.

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