A company compared the performance of two temperature instruments: one coupled to a process computer and the other used for visual control. Ideally, these two instruments should agree. The following data are the two temperatures over a five day period: (see chart in attached file) a. Conduct the most appropriate hypothesis
1. The yields from an ethanol-water distillation column have a standard deviation of 0.01. Process specifications call for a target yield of 0.93. Management wishes to detect any decrease in the true mean yield. a. A random sample of 8 recent batches produced the following yields. Conduct a hypothesis test to determine
Please provide analysis to the attached article 1.) Briefly summarize the article 2.) Identify the hypothesis described in the article 3.) Explain how the hypothesis statement was used in the study
At one time the mean value of land and building per acre from a sample of farms was $ 637, with a standard deviation of $23. Find the approximate percentage of acreage whose values were between $614 and 660. Approximate %.
Central Airlines claims that the median price of a round-trip ticket to Jackson Hole, Wyoming, is $503. This claim is being challenged by the Association of Travel Agents, who believe the median price is less than $503. To resolve the issue, a random sample of 400 round-trip tickets was selected. Of these, 160 tickets were below
In a recent national survey, the mean weekly allowance for a nine-year-old child from his parents was $3.65. A random sample of 45 nien-year-old in northwestern Ohio revealed the mean allowance to be $3.69 with standard deviation of .24. At the .05 level of significance, is there a difference in the mean allowance nationally and
Captopril is a drug designed to lower systolic blood pressure. When subjects were tested with this drug, their systolic blood pressure readings (in mm of mercury) were measured before and after the drug were taken, with the results given in the table: a. Construct a 99% confidence interval for the mean difference between the
In a particular market there are three commercial television stations, each with its own evening news program from 6:00 to 6:30 P.M. According to a report in this morning's local newspaper, a random sample of 150 viewers last night revealed 53 watched the news on WNAE (channel 5), 64 watched on WRRN (channel 11), and 33 on WSPD
The chief of security for the Mall of the Dakotas was directed to study the problem of missing goods. He selected a sample of 100 boxes that had been tampered with and ascertained that for 60 of the boxes, the missing pants, shoes, and so on were attributed to shoplifting. For 30 other boxes employees had stolen the goods, and f
A machine is set to produce tennis balls so the mean bounce is 36 inches when the ball is dropped from a platform of a certain height. The supervisor suspects that the mean bounce has changed and is less than 36 inches. As an experiment 42 balls were dropped from the platform and the mean height of the bounce was 35.5 inches, wi
Please help set up this problem and create the pivot table in Excel. 1. The attached file MBA.XLS contains the results of a study on the academic preparation of MBA students and their performance in a Quantitative Analysis Course. A group of 181 students, constituting a random sample, was classified according to their latest
3 a)Â Â Â Â In an experiment to determine the effects of drought conditions on a certain variety of potato, the following data on crop yield (g/plant) was obtained: TREATMENT SAMPLE SIZE MEAN YIELD STANDARD DEVIATION WATERED 6 376 78.4 UNWATERED 12 234 65.8 Does the data suggest that water
Exercise # 14 The null and alternate hypotheses are: A random sample of 15 observations from the first population revealed a sample mean of 350 and a sample standard deviation of 12. A random sample of 17 observations from the second population revealed a sample mean of 342 and a sample standard deviation of 15. At the .10
You are applying for a job at two companies. Company A offers starting salaries mean=$31000 and standard deviation = $12000. Company B offers starting salaries with mean=$31000 and standard deviation =$9000. From which company are you more likely to get an offer of $57000 or more?
1) Ms. Maria Wilson is considering running for mayor of the town of Bear Ghulch, Montana. Before completing the petitions, she decides to conduct a survey of voters in Bear Gulch. A sample of 400 voters reveas that 300 would support her in the November election. a) estimate the value of the population proportion. b) comput
#10 The chief of security for the Mall of the Dakotas was directed to study the problem of missing goods. He selected a sample of 100 boxes that had been tampered with and ascertained that for 60 of the boxes, the missing pants, shoes, and so on were attributed to shoplifting. For 30 other boxes employees had stolen the goods
Because of uncertainty in real estate markets, many homeowners are considering remodeling and constructing additions rather than selling. The most expensive room in the house to remodel is the kitchen, with an average cost of $23,400. In terms of resale value, is remodeling the kitchen worth the cost? The following cost and r
The national average for the price of a gallon of unleaded regular gas is $1.16. I believe the price is higher in my area of the country. I want to test my claim by randomly selecting gas prices for 25 stations in my area. The following prices are: $1.27 $1.29 $1.16 $1.20 $1.37 1.20 1.23 1.19 1.20 1.24
The records of a casualty insurance company show that, in the past, its clients have had a mean of 1.9 auto accidents per day with a standard deviation of 0.04. The actuaries of the company claim that the standard deviation of the number of accidents per day is no longer equal to 0.04. Suppose that we want to carry out a hypo
Need help working my way through the rest of the 5 steps with the information given. The null hypothesis is the average miles per gallon of fuel used in the Toyota Highlander hybrid vehicle, ?h is higher to equal to than that of a Toyota Hylander standard eight cyclinder, ?8. The alternative hypothesis is the average miles per
1.)If the population standard deviation ( s) is known then we use it in calculating the z-statistic as follows. z= [Xbar - m ] / [ s/ sqrt(n) ] On the other hand if population standard deviation is unknown, we substitute the sample standard deviation (s) in place of population standard deviation in calculating the z-statist
Can you explain P- value in easy to understand terms. Statistics is very confusing for me and I feel lost, any help you can give me will be greatly appreciated.
A recent article in the Wall Street Journal reported that 30-year mortgage rate is now less than 6 percent. A sample of eight small banks in the Midwest revealed the following 30-year rates (in percent): 4.8 5.3 6.5 4.8 6.1 5.8 6.2 5.6 At the .01 significance level, can we conclude that the 30-year mortgage rate f
An owner of a fast food restaurant reported to corporate headquarters that the average bill paid by his customers in the last quarter was $6.20 and that the standard deviation was $1.90. Not knowing exactly what the effect would be, headquarters suddenly launched a nationwide promotional campaign featuring a large quantity disc
Discuss research highlighting where ANOVA and other statistical analysis is being used and why it's used.
(See attached file for full problem description with proper symbols) Samples of sizes 10 and 18 taken from two normal distributions gave and Using the F distribution, show that F = 0.49 and 1/F = 2.04, and test the hypothesis
Given that X is a normal variable and given the sample values x̄ = 42, s = 6, n = 20, (a) test the hypothesis that μ = 44 by showing that student t = -1.49 and (b) show that 95% confidence limits for μ are 39.2 < μ < 44.8.
There are three hospitals in the Tulsa, Oklahoma, area. The following data show the number of outpatient surgeries performed at each hospital last week. At the .05 significance level, can we conclude there is a difference in the mean number of surgeries performed by hospital or by day of the week? Day Number of Surgeries P
The manager of a computer software company wishes to study the number of hours senior executives spend at their desktop computers by type of industry. The manager selected a sample of five executives from each of three industries. At the .05 significance level, can she conclude there is a difference in the mean number of hours s
As part of a study of corporate employees, the Director of Human Resources for PNC, Inc. wants to compare the distance traveled to work by employees at their office in downtown Cincinnati with the distance for those in downtown Pittsburgh. A sample of 35 Cincinnati employees showed they travel a mean of 370 miles per month, with