In 2002 the Supreme Court ruled that schools could require random drug tests of students participating in competitive after-school activities such as athletics. Does drug testing reduce use of illegal drugs? A study compared two similar high schools in Oregon. Wahtonka High School tested athletes at random and Warrenton High School did not. In a confidential survey, 5 of 140 athletes at Wahtonka and 25 of 102 athletes at Warrenton said they were using drugs. Regard these athletes as SRSs from the populations of athletes at similar schools with and without drug testing.

(a) You should not use the large-sample confidence interval. Why not?
Choose a reason. The sample sizes are too small. The sample sizes are not identical. The sample proportions are too small. At least one sample has too few failures. At least one sample has too few successes.

(b) The plus four method adds two observations, a success and a failure, to each sample. What are the sample sizes and the numbers of drug users after you do this?

Wahtonka sample size:      Wahtonka drug users:  
Warrenton sample size:      Warrenton drug users:

(c) Give the plus four 95% confidence interval for the difference between the proportion of athletes using drugs at schools with and without testing.
Interval: to

1. A researcher has gathered information from a survey of 25 randomly selected university campuses. From this data, it was reported that the average number of reported sexual assaults on these campuses in the last year was 12 with a standard deviation of 3. Calculate a 95% confidence interval to estimate the average number of sexual assaults on Canadian university campuses as a whole. Remember to report your confidence interval in a complete sentence and describe what it means. (15%)

2. A survey was conducted at Acadia on attitudes toward the campus alcohol policy against drinking games in residence with 262 randomly selected residence students. In response to the question, “Are you in favour of the drinking games policy?” 25% were in favour. What is the 99% confidence interval to estimate the percentage of all Acadia residence students regarding the drinking game policy? Remember to report your confidence interval in a complete sentence and describe what it means. (15%)

3. School boards in Nova Scotia, on average receive a budget of $623.00 per student from the provincial government. A random sample of 45 rural schools report that they received on average $605 per student with a standard deviation of $74. Is there a significant difference in the budgets between rural schools and the whole province? (20%)

This question is an example of statistical research using hypothesis testing. You will need to use the 5 step model of hypothesis testing to test for significance at a=.05.

• State assumptions

• State the null hypothesis and the alternative hypothesis
• State the appropriate hypothesis test for each question and determine your critical scores for testing significance at .05
• Calculate your test statistic making sure you show your formulas
• Interpret your results using complete sentences indicating is significance was determined

4. Nationally, the unemployment rate for teenage males is 18%. A random sample of 323 teenage males in your area reveals an unemployment rate of 21.7%. Are our local teens more likely to be unemployed?   (20%) This question is an example of statistical research using hypothesis testing. You will need to use the 5 step model of hypothesis testing to test for significance at a=.01.

• State assumptions

• State the null hypothesis and the alternative hypothesis
• State the appropriate hypothesis test for each question and determine your critical scores for testing significance at .01
• Calculate your test statistic making sure you show your formulas
• Interpret your results using complete sentences indicating is significance was determined

USING SPSS

5. What is the 99% confidence interval for the proportion of Canadians that have more than a high-school education? For this question you will need to use your data (your sample of Canadian) from the Canadian Community Health Survey. Use the variable (EDUDH04), create a new variable where 1=more than high school, and 0= every other VALID response. Calculate the statistics you need to construct your confidence internal, and then calculate the interval by hand by using the appropriate formula. (20%)

Copy and past a frequency table of your dummy variable (make sure your new variable is labelled) into your assignment. Copy and paste your statistics box. Write your answer in a complete sentence and describe what it means.

For all hypothesis testing problems Find each steps. Traditional method Step

1 State the null, alternative hypothesis, and identify the claim Step

2 Find the critical region and critical value(s) Step

3: Compute the test value Step

4 Make the decision to reject or do not reject H0 and conclusion.

Show how you arrived at your solution on the answer sheet for full credit. Write neatly, clearly and be organized.

1.The average hemoglobin reading for a sample of 20 teachers was 16 grams per 100 milliliters, with a sample standard deviation of 2 grams per 100 milliliters. (15 points)

a) Find the 99% confidence interval of the true mean.

b) Support the medical research team is investigating that true mean is 19 grams per 100 milliliters in a previous year, does your sample suggest that the true population mean for all teacher should be reject? Explain

c) Support the medical research team is investigating that true mean is 14 grams per 100 milliliters in a previous year, does your sample suggest that the true population mean for all teacher should be reject?

Explain 2. Of 318 randomly selected medical students, 21 said that they planned to work in a rural community. (15 points)

a) Find a 90% confidence interval for the true proportion of all medical students who plan to work in a rural community. Write your answer with three decimal places

b) If the population proportion is 0.037. Do you reject the population proportion? Explain

c) If the population proportion is 0.083. Do you reject the population proportion? Explain 3.

The manager of a large factory believes that the average hourly wage of the employees is below $9.98 per hour. A sample of 18 employees has a mean $9.60. the sample standard deviation is $1.42. At α = 0.10, is there enough evidence to support the manager’s claim? Use Traditional method (10 points)

4. A travel associate claim that the mean daily meal cost for two adults traveling together on vacation in New York is $105. A random sample of 20 such groups of adults has a mean daily meal cost of $110 and a sample standard deviation of $8.50. Is there enough evidence to reject the claim at α = 0.05? Use Traditional method (10 points)

5. Researchers suspect that 18% of all high school students smoke at least one pack of cigarettes a day. In New York one high school, with an enrollment of 300 students, a study found that 50 students smoked at least one pack of cigarettes a day. At α = 0.02, can the study conclude that 18% of all high school students smoke at least one pack of cigarettes a day? Use Traditional method (10 points)

6. A humane society claim that 35% of U.S. households own a cat. In a random sample of 300 U.S. households, 24% say they own a cat. At α = 0.02, is there enough evidence to reject the society’s claim? Use Traditional method (10 points)

The Dean of the Albers School of Business has an Advisory Board that evaluates the Dean’s performance each year. What two specific performance measures would you suggest to be used to determine the Dean’s performance? Explain your choices.

1. Describe parental and environmental risk factors for child maltreatment. Then discuss factors that appear to mediate the impact of abuse.

2. Describe the skills that elementary school-age children develop as they learn to read, comprehend, and write effectively.

Write down the implementation process of the strategy of implementing school nurse in every schools of blue mountains local health district. How do you implement it within all schools of blue mountains local health district?

Think about a recent conversation (in the workplace, school, or home) where you had trouble communicating.

What were your barriers to sharing the message and/or understanding the message? Discuss ways that you could have minimized the barriers?