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    Hypothesis Testing

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    The Association Between Maternal Age and Birth Weight

    See the attached file. A small pilot study is being conducted to determine the association between maternal age and birth weight. First, from all the single births in 2009 at Hospital X with mothers aged less than or equal to 20 years, we randomly selected 15 records. We also selected randomly 17 records from all the sing

    Statistical Significance

    Discuss the concept of statistical significance, including your understanding of what it means, why it is important, and how it can be used.

    Baseball 2010: Test of hypothesis

    Refer to the Baseball 2010 data (attached), which reports information on the 30 Major League Baseball teams for the 2010 season. a. Conduct a test of hypothesis to determine whether the mean payroll of the teams was different from $80.0 million. Use the .05 significance level. b. Conduct a test of hypothesis to determine w

    Quantitative Methods and Analysis

    Using AIU's survey responses from the AIU data set, can you please help me complete the following requirements: TEST #1 Perform the following two-tailed hypothesis test, using a .05 significance level: â?¢Intrinsic by Gender â?¢State the null and an alternate statement for the test â?¢Use Microsoft Excel (Data

    Statistics Case Study Problem

    A researcher predicts that watching a film on institutionalization will change students' attitudes about chronically mentally ill patients. The researcher randomly selects a class of 36 students, shows them the film, and gives them a questionnaire about their attitudes. The mean score on the questionnaire for these 36 students i

    Null and Alternative Hypotheses

    At one school, the average amount of time that tenth-graders spend watching television each week is 18.4 hours. The principal introduces a campaign to encourage the students to watch less television. One year later, the principal wants to perform a hypothesis test to determine whether the average amount of time spent watching

    Null Hypothesis: Paranormal Researcher

    A skeptical paranormal researcher claims that the proportion of Americans that have seen a UFO is less than 1 in every one thousand. State the null hypothesis and the alternative hypothesis for a test of significance.

    Reject or Fail to Reject the Null Hypothesis

    A researcher predicts that watching a film on institutionalization will change students' attitudes about chronically mentally ill patients. The researcher randomly selects a class of 36 students, shows them the film, and gives them a questionnaire about their attitudes. The mean score on the questionnaire for these 36 students i

    Treaded Discussion

    Examples of Six Sigma Tools for Statistical Significance. Cite an example of your experience with applying Six Sigma tools for Statistical significance in the workplace. If you do not have an actual example, suggest a situation or context in which the tools would provide valuable quality improvement help. Use the classic que

    Statistics

    Harris, Schoen, and Hensley (1992) conducted a research study showing how cultural experience can influence memory. They presented participants with two different versions of stories. One version contained facts or elements that were consistent with a U.S. Culture and the second version contained material consistent with a Mexic

    Hypothesis Testing for tap vs. bottled water

    I conducted a hypothesis testing on bottled water vs tap water. I had one participant and 30 trials over a period of 3 days. The subject successfully identified tap vs water 14 times. I need to know how to calculate this data using Z and p value calculations in excel (or any statistical calculation) and be able to explain the da

    Baseball 2010 data

    Refer to the Baseball 2010 data, which reports information on the 30 Major League Baseball teams for the 2010 season. Prepare a report on the variable team payroll that specifically addresses each of the following questions. a. Around what values do the payrolls tend to cluster? What are the mean and median of payroll? Is one

    Use critical value to evaluate the null hypothesis

    Choo Choo Paper Company makes various paper products. One of their products is a 30 mils thick paper. In order to ensure that the thickness of the paper meets the 30 mils specification, random cuts of paper are selected and the thickness of each cut is measured. A sample of 64 cuts had a mean thickness of 30.3 mils with a standa

    Hypothesis Testing: Finding the Number of Resignations

    Please help with the following statistics problem. Please provide step by step calculations in Excel. The personnel department reported 60 resignations during the last year. The following data shows the seasons in which they occurred: Season.......................Number of resignations Winter.........................10

    Calculating the P-Value in Excel Based on the Null hypothesis T-Test

    A major manufacturer of golf equipment seeks to improve its market share by introducing a golf ball that is less likely to slice when hit. The company's research and development group has been experimenting with dimple patterns that promote straight flight, and have achieved some degree of success. The vice president of marketin

    Statistics

    1.) The following sample was obtained from a population with unknown parameters. Scores: 6, 12, 0, 3, 4 Compute the sample mean and standard deviation. (Note that these are descriptive values that summarize the sample data). Next part of question is to compute the estimated standard error for M. (Note that this is an

    Multiple t test based questions

    1.) A spelling test is given to random samples of size 6 from executive secretaries at each of two large insurance companies. The results (in errors/document are: Company A Company B Subject 1 5 3 2 9

    Statistical Problems

    1.) Two candidates for governor participated in a televised debate. A political pollster recorded the preferences of 500 registered voters in a random sample prior to and after the debate: Preference After Debate Preference Prior

    Statistical Problems

    1. Although many people think they can put a meal on the table in a short period of time, an article reported that they end up spending about 40 minutes doing so. Suppose another study is conducted to test the validity of this statement. A sample of 25 people is selected, and the length of time to prepare and cook dinner (in min

    Comparing Populations Using Statistical Inference

    Sammy, the owner of a fast food chain called Sammy's Subs, wants to know whether the levels of daily sales are different between his shop in Edina and the one in Richfield. He records sales in each shop for a month, in the Sammy's Subs Sales Data Excel file. Use the data in this file to determine whether sales levels are differe

    Hypotheses for Mutual Funds

    Mutual funds are classified as load or no-load funds. Load funds require an investor to pay an initial fee based on a percentage of the amount invested in the fund. The no-load funds do not require this initial fee. Some financial advisors argue that the load mutual funds may be worth the extra fee because these funds provide a

    Hypothesis Test for Consensus Estimate

    On Friday, Wall Street traders were anxiously awaiting the federal government's release of numbers on the January increase in nonfarm payrolls. The early consensus estimate among economists was for a growth of 250,000 new jobs (CNBC, February 3, 2006). However, a sample of 20 economists taken Thursday afternoon provided a sampl

    Hypothesis Testing in Excel

    Annual per capita consumption of milk is 21.6 gallons (Statistical Abstract of the United States: 2006). Being from the Midwest, you believe milk consumption is higher there and wish to support your opinion. A sample of 16 individuals from the Midwestern town of Webster City showed a sample mean annual consumption of 24.1 gallon

    Null hypothesis

    You're trying to explain null and alternative hypotheses to one of the senior managers at Company W and he's not "getting it" when you use snack food sales. Help him by thinking about a business problem in another organization or department. Formulate a null hypothesis and the corresponding alternative hypothesis that could be t

    The Role of Mental Health in Physical Health

    'Does mental health play a role in physical health?' 1. Briefly remind us of the two variables in your correlation and the operational definition of each. 2. State the null hypothesis and the alternative hypothesis (be sure to clearly label each one) for your correlation. 3. Explain what it would mean if we rejected the nu

    Hypothesis Testing Using One Sample

    Scenario 1 The vice president of operations for a veterinary supply company has designed a new quality control process that she believes will significantly reduce the reject rate in the packing line for bottles of equine glucosamine from its historical level of 32 units per 1,000. She now wants to implement a pilot of this pr