#### Hypothesis Test Questions

1 Errors & Significance A STAT 200 instructor wants to compare the final exam scores of students taught using two different curricula. She obtains a sample of 500 students. She randomly assigns 250 students to a traditional curriculum and 250 students to a new curriculum. It is hypothesized that ...

#### STA108 Chapters 16,17: General Statistics

1. A level 0.95 confidence interval is a. any interval with margin of error ± 0.95. b. a range of values computed from sample data that will contain the true value of the parameter of interest 95% of the time. c. a range of values with margin of error ± 0.95, which is also correct 95% of the ti...

#### Confidence Interval and Tests of Hypotheses

1. The CDC estimated that influenza vaccination reduced the risk of flu illness in 600 of 1000 randomly sampled individuals during seasons when most circulating flu viruses are well-matched to the flu vaccine. Construct the 97% confidence interval for the population proportion. State your conditions...

#### Inference for Two Samples

1. Market researchers working for a large fitness company want to know if male and female patrons differ in terms of how many hours per week they spend at the gym. At their gym, customers have ID cards that they use to sign in and out of the gym, so the researchers are able to obtain data concernin...

#### EPA and Statistics self-efficacy

1. The Environmental Protection Agency (EPA) is testing tap water in one community. If they find evidence that the average level of lead is greater than 15 parts per billion (ppb) they will order that the water be turned off and that residents be given free bottled water until the problem is fixed. ...

#### Chi-Squared and Regression

A pharmaceutical company develops a new drug that helps obese patients who are not currently diabetic avoid contraction of diabetes. The conduct conducts a trial splitting a sample of 135 patients into two groups, a drug group and a placebo group. They then monitored the patients for 5 years and not...

#### Z-Tests and T-Tests

The percent of hospitals in Region 3 of the northwestern United States that reached maximum occupancy at least once in January 2015 was 82%. The regional administration wants to conduct a study to determine if the rate has changed. Before conducting the study, she assumes that the average rate is st...

#### Pallet and Phone Population Examples

Refer to the Excel file Pallet to address all the questions below: The file contains the weight in pounds from a sample of 368 pallets of Boston shingles and 330 pallets of Vermont shingles. 1. For the Boston shingles, is there evidence at the 0.05 level of significance that the population mean we...

#### Drug Test: Statistical Analysis

Twenty sets of depressed twins are obtained for a study on the effects of a new antidepressant. In each twin set, one twin is assigned to receive the drug, and the other is designed to receive the placebo. Three months later, depression levels are measured on a scale from 1 (not at all depressed) to...

#### Correlation Descriptive Analysis

I have started building the body of the paper . See attached question and draft paper . I will like you to recommend - The descriptive analysis to run - The Statistics tests to run - the type of data i should provide from my statistics to run the tests - once i provide the data then we can...

#### Percentiles and Hypothesis Testing with Z-Tests

HOMEWORK 6 Percentiles and Hypothesis Testing with Z-Tests When submitting this file, be sure the filename includes your full name, course and section. Example: HW6_JohnDoe_354B01 Be sure you have reviewed this module/week's lesson and presentations along with the practice data analysis before p...

#### Chi-Square Tests and Linear Regression

5. At a school pep rally, a group of sophomore students organized a free raffle for prizes. They claimed that they put the names of all the students in the school in the basket and that they randomly drew 36 names out of this basket. Of the prize winners, 6 were freshmen, 14 were sophomores, 9 were ...

#### Stock Analyst Statistics

A stock analyst wants to determine whether there is a difference in the mean rate of return for three types of stock: utility, retail, and banking stocks. The following output is obtained: Picture a. http://ezto.mheducation.com/13252703214728584664.tp4?REQUEST=SHOWmedia&media=lind16e.png Usi...

#### BMI, Caffeine Consumption, Crossover

Week 4 Problems—30 points 10 points per problem. • The mean body mass index (BMI) for boys age 12 is 23.6. An investigator wants to test if the BMI is higher in 12-year-old boys living in New York City. How many boys are needed to ensure that a two-sided test of hypothesis has 80% power...

#### Excel Cake Mix

Copy the Assignment Data (i.e., cake mix data) to Sheet 1, cells A1:P32, of a new Excel workbook. Select the most appropriate hypothesis test described in Sections 4.3 and 4.5 to evaluate the following null hypothesis using this worksheet: There is no difference in mean grams of sugar between na...

#### Hypothesis Testing using Alpha

NFL2000 Using these data, perform an appropriate test of hypothesis, at the alpha = .05 level of significance, to determine whether compensation for players in the NFL is dependent on the team for which they play. What is your conclusion? NFL salaries and bonuses 2000 season ...

#### Single-sample t-test

HOMEWORK 8 Single-Sample T-Test When submitting this file, be sure the filename includes your full name, course and section. Example: HW8_JohnDoe_354B01 ________________________________________ Part I: Concepts Questions 1-3 ________________________________________ These questions are bas...

#### Biostat Case Study

There are seven questions at the end of this article. This assignment is worth 80 points. Place answers in this table: 1. 2. 3. 4. 5. 6. 7. BIOSTAT Case Study: Tests of Association for Categorical Data LEARNING OBJECTIVES At the completion of this Case Study, participants...

#### Conducting a one-way ANOVA

A medical researcher wants to determine whether there is a difference in the mean length of time it takes three types of pain relievers to provide relief from headache pain. Several headache sufferers are randomly selected and given one of three medications. Each headache sufferer records the time (...

#### Problem on Confidence Interval of Proportion

A study was carried out to understand the amount of time put in by the students in three management institutes. One hundred students from different institutions were surveyed. Information regarding the hours put in by the students per week is summarized in the following contingency table: Institu...