Lester Hollar is vice president for human resources for a large manufacturing company. In recent years, he has noticed an increase in absenteeism that he thinks is related to the general health of the employees. Four years ago, in an attempt to improve the situation, he began a fitness program in which employees exercise during their lunch hour. To evaluate the program, he selected a random sample of eight participants and found the number of days each was absent in the six months before the exercise program began and in the six months following the exercise program. Below are the results.

Click here for the Excel Data File

At the 0.025 significance level, can he conclude that the number of absences has declined? Estimate the p-value.

1. State the decision rule for 0.025 significance level. (Round your answer to 3 decimal places.)

2. Compute the test statistic. (Round your answer to 3 decimal places.)

3. The p-value is

• Between 0.025 and 0.05

• Between 0.001 and 0.005

• Between 0.005 and 0.01

4. State your decision about the null hypothesis.

Some researchers claim that herbal supplements such as ginseng or ginkgo biloba enhance human memory. To test this claim, a researcher selects a sample of n = 36 college students. Each student is given a ginkgo biloba supplement daily for six weeks, and then all the participants are given a standardized memory task. For the population, scores on the test are normally distributed with µ = 70. The sample of n = 36 students had a mean score of M = 75 and a standard deviation of s = 10. Can we conclude that the herb has a significant effect on memory? Use a two-tailed test with α = 0.01.

What type of statistical test is appropriate for this research question?

State the null and alternative hypotheses using statistical notation OR using plain English (a sentence for each)

What are the degrees of freedom and critical values for this test?

Calculate the test statistic

What is your decision? And what does that decision mean, or how would you interpret/explain your decision?

Compute Cohen’s d. How would you describe the size of the effect

1. Why is it that lethal recessive alleles remain in the human gene pool, rather than just disappearing because of their unfavorable phenotype for homozygous recessives?

2. Scenario: A sudden flood of a large area around the Mississippi River occurs. In some local populations of a species of insects, there is greater buoyancy and survival of some individuals due to having the double recessive genotype of a gene that allowed them to accumulate more lipids to float. A year after the flood, the same and displaced local populations of the insects were reduced in size and all biased in allele frequencies toward greater frequency of the recessive allele compared to the original population’s allelic frequencies. Which of the forces that affect populations seems to have had the strongest effect?

3. Do you think the National Park Service made the correct decision not to permit a genetic rescue of the Isle Royale wolves in 2015, or should new individuals be introduced? Provide reasoning for your answer (as a biologist).

1. Why is it that lethal recessive alleles remain in the human gene pool, rather than just disappearing because of their unfavorable phenotype for homozygous recessives?

2. Scenario: A sudden flood of a large area around the Mississippi River occurs. In some local populations of a species of insects, there is greater buoyancy and survival of some individuals due to having the double recessive genotype of a gene that allowed them to accumulate more lipids to float. A year after the flood, the same and displaced local populations of the insects were reduced in size and all biased in allele frequencies toward greater frequency of the recessive allele compared to the original population’s allelic frequencies. Which of the forces that affect populations seems to have had the strongest effect?

3. Do you think the National Park Service made the correct decision not to permit a genetic rescue of the Isle Royale wolves in 2015, or should new individuals be introduced? Provide reasoning for your answer (as a biologist).

4.

The United Nations' Human Settlements Program forecast that by the year 2020 what percent of the world's population would live in poverty?

7.

The Federal Trade Commission advocates which of the following for business security?

8.

In 2009 the U.S. government announced plans to spend how much to spur the use of digital or electronic patient records, as part of a national effort to reduce medical costs?

Bushy syndrome (BuS), sometimes referred as Amsterdam dwarfism, is a rare human disease caused by a dominant loss-of-function mutation in any one of at least five different genes, all of which encode components or regulators of the cohesin protein complex. People with BuS have a wide range of morphological abnormalities, including growth retardation, mental impairment and sterility. Analysis of BuS patients shows that in addition to chromosomal mis-segregation during cell division, their abnormal phenotype may be likely due to widespread mis-regulation of gene expression during development. Cohesin may play a role in organizing the chromatin loops necessary for proper regulation of transcription. A. (4 points) In different families, BuS can show an autosomal dominant or X-linked dominant inheritance pattern. How is this possible? What is this an example of? B. (4 points) Explain how a loss-of function allele in a gene encoding the cohesin protein could be dominant to the wild-type allele. C. (4 points) BuS is usually caused by new mutation in one parent's genome. Why? D. (3 points) Explain the general function of the cohesin complex in eukaryotic chromosomes. E. (1 Bonus point) What is the role of shugosin?

A researcher is reviewing 26 UAS accidents and wants to prove that human error involving unsafe acts are mainly due to preconditions. Of the accident information two variables were selected to prove the Hypothesis that preconditions for unsafe acts are a greater factor than unsafe supervision. Using the provided data answer the following and show results of each step.

1. Determine normality

2. What statistical Test is most appropriate

3. Determine if the hypothesis is true

4. What test should you use to show validity of hypothesis results

5. Show all results using either mini tab, excel or stat crunch.

Suppose you work in a human resources department and want to see if average job satisfaction differs by Industry (Factor A), Level of Work Experience (Factor B), or an interaction of both Industry and Level of Work Experience (AB). You randomly select 3 workers from each of the 9 combinations of industry and work experience and administer a satisfaction survey. Using the results of the ANOVA below, if you want to test for significant interaction effects on job satisfaction, what is the F-test statistic?

Select one:

1.844

1.496

8.302

12.453

None of the above