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Hypothesis Testing

Statistical Modeling and Analysis: State the Hypotheses

See attached files. Statistical analysis and presentation of results from a complex data set about ladybirds. You are given a complex data set on the variation of ladybirds This data can be used to examine a range of possible hypotheses. Your task is to state produce a succinct report on this data. Your report

Research Design Statistical Procedures

Research Design. Assume that you are going to conduct an experimental study related to your research question. What statistical procedures would you need to use to accept or deny your hypotheses? Support your answer with references to statistical manuals. You will need to convince the professor that your choices are the best

Hypothesis testing for data of salaries of technology professionals

See attached file using SPSS software to open the .sav file to view data. The data in the table, obtained from Business Week's (June 22, 2006) technology section, represents typical salaries of technology professionals in 13 metropolitan areas for 2003 and 2005. Suppose you want to determine if the mean salary of technology

Hypothesis testing for new paint color mixing machine.

See attached file using SPSS software to open the .sav file to view data. A home improvement store recently purchased a new paint color-mixing machine. The machine is rated to produce 5 gallons of mixed paint every minute. The store's manager suspects that the machine is underperforming. In order to test his hypothesis,

Hypothesis testing for Kohl's average store sales in the east vs the west coast

The data is attached in eastwest.sav (need to have SPSS to open file) The CEO of Kohl's is interested in understanding whether the average store sales for the stores in the east coast are significantly different from those in the west coast. The CEO suspects that since the company has been advertising more in the east coast,

Statistics: Conduct a test to determine if the mean heat rate of gas turbines

See attached file using SPSS software to open the .sav file to view data. During period of high electricity demand, especially during the hot summer months, the power output from a gas turbine engine can drop dramatically. One way to counter this drop in power is by cooling the inlet air to the gas turbine. An increasingly

Statistics Problems

See attached file for proper format. 1. Write the claim mathematically and identify H0 and Ha. (b) find the critical value(s) and identify the rejection region. (c) Find the standardized test statistic. (d) determine whether to reject the null hypothesis. In a sample of 1741 home buyers, you find that 804 home buyers found th

Testing Means in a Two-Group Design

T test for independent groups and dependent groups (Two-group designs) 1. An LU professor is interested in whether there is a difference between undergraduate students and graduate students in the amount of time spent praying each day. The professor gathers information from random samples of undergraduate and graduate student

Standard Deviation and Mean Calculation Spread Sheet

A hospital human resources manager finds that the local average starting salary for nurses is $24,000. She randomly samples 10 nurse's salaries at the hospital and calculates a mean of $23,450 and a standard deviation of $400. RQ: Is the average starting salary for nurses in her hospital at $24,000 with a 95% confidence leve

Hypothesis Testing: Population mean and proportion

Please assist with answering the following questions attached dealing with Hypothesis Testing. Hypothesis Testing Setting Up Hypothesis 1. For the following problem statement, identify the null hypothesis H0 and the alternative hypothesis H1. Suppose that a mayor claims that the mean salary for the working profession

Statistics: Shuttle-run test scores, calculate range, interval, frequency polygon

Please show work in Excel format, The following scores are from a 4 x 10 yard shuttle-run test for a group of middle school students. The scores are measured in seconds to the nearest tenth of a second. Raw Data: 12.1 12.9 13.1 13.6 15.4 12.2 12.3 11.9 11.8 10.4 10.8 13.0 9.3 11.4 13.8 11.8 10.9 13.4 12.7 10.8 14.8 15.9 11

Company's Average Absentee Rate and P-Value Interpretation

1. Over the last year the absentee rate at a large corporation averaged 8.2 days absent with a standard deviation of 6 days. One department with 40 employees had an absentee rate of 12 days per employee. During an investigation the department head argued as follows: 'If you took 40 employees at random from the corporation, th

Statistics: Chapters 8, 9, 10 - 3 problems for each chapter

See attached file. Questions 6,16,18 for Chp 8 4, 10, 14 for Chp 9 4, 6, 8 for Chp 10 Chapter 8 #6 A researcher is investigating the effectiveness of a new study-skills training program for elementary school children. A sample of n = 25 third grade children is selected to particip

Hypothesis testing: Revolutionary hypothesis by Professor Brainstorm

Suppose a revolutionary hypothesis has been proposed by the famous Professor Brainstorm, and yet the truth were known, it really wouldn't fit facts. In the formal language of hypothesis testing, it is the null hypothesis that is true, not Brainstorm's hypothesis. (The professor interpreted his results at the 5 percent level).

Hypothesis for a new company program to teach reading to elementary students

1. Suppose that you work for a company that has just created a program designed to teach reading to elementary students. Discuss how an experiment could be created to see whether this product is superior to other reading programs. Develop a hypothesis, label the independent and dependent variables, discuss what the experimental

Test hypothesis that company claims they are meeting the standard

See attached data file. The excel file sales data provides data on a sample of customers. An industry trade publication states that the average profit per customer for this industry was $4500. Using a test of this hypothesis, can this company claim that they are meeting the standard? Can this company claim that they are e

Hypothesis Testing of Proortions: Lovastatin

Does lovastatin (a cholesterol-lowering drug) reduce the risk of heart attack? In a Texas study, researchers gave lovastatin to 2,325 people and an inactive substitute to 2,081 people (average age 58). After 5 years, 57 of the lovastatin group had suffered a heart attack, compared with 97 for the inactive pill. (a) State the

Use SPSS to analyze class anxiety at midterm and again at the end of the course

A professor wants to determine if his class' anxiety decreases over the course of the semester. He uses a test to measure a random sample of all students enrolled at midterm and again at the end of the course. He realizes by looking at the scale that good interval leval data is not reflected. Does the data reflect a signi

What are the appropriate Ho and Ha

Module 17 4. What are the appropriate Ho and Ha for each of the following research studies? In addition, note whether the hypothesis test is one-or two-tailed. a. A study in which researchers want to test whether there is a difference in spatial ability between left- and right-handed people. b. A study in which resear

Sample size & Normal Probability

1. Construct a confidence interval for µd the mean differences d for population of paired data. Assume that the population of paired differences is normally distributed. 10 different families are tested for the number of gallons of water a day they use before and after viewing a conservation video. Construct a 90% confidence

Larger proportion of college students than young children

Do a larger proportion of college students than young children eat cereal? Researchers surveyed both age groups to find the answer. The resulsts are shown in the table below. A. State the hypotheses used to answer the question B. Using a=.05, state the decision rule and sketch it C. Find the sample proportions and z stat

Hypothesis Testing of Mean: P-value Method

Use the p value method to determine whether or not to accept or reject the null and alternate hypotheses. 1. You are determining whether the true mean is less than 11 with a 95% confidence based on the following statistics: n(sample size) = 14 sample mean = 9 sample st. dev = 4 2. You are trying to determi

Find null and alternate hypothesis

I'm having a hard time understanding hypothesis testing and I would like to know how to set this problem up correctly and solve it so I know how to do this on an exam: The Crown Bottling Company has just installed a new bottling process that will fill 16-ounce bottles of the popular Crown Classic Cola soft drink. Both overfil

Critical Value, Sample Statistic & Probability Value

Please view the attached document for format. Please provide computation where necessary. 1. Suppose that the shoe company Alta Claims that their mean weekly sales are $17,350. A random sample of 35 weeks yields a sample mean of $10,450. With a sample standard deviation of s =$1500. Given that the pair of hypothesis that

Hypothesis Test

For the nine states in the Northeast, murder rates were compared to poverty rates to see whether they were correlated. The [Pearson] correlation is 0.58. Write a null and alternative hypotheses. What is the p-value for the test that it is significantly differs from 0? What is the meaning of the p-value? What is the decision if

Hypothesis testings, test statistics-distributions, probability

Q1).it is believed that 1 in every 10 cases are observed with diarrhoeal disease. To verify the claim, a sample of 10 persons is collected. A test is carried out at alpha=0.05. a).state the underlying distribution of the problem. b). find the probability that at least 7 persons carry the disease. c). A test is conducted at

Identify the Hypothesis: Claim of weekly losses

See attached file for better formatting. For the following problem statement, identify the hypothesis H0 and the alternative hypotheses H1. Suppose that a company claims that their weekly losses are no more than $2,500. A sample of 40 random weeks finds a mean weekly loss of $3,200 with an estimated population standard d