1. For each the following variables from the Salary Data
Set provide the measures of location and measures of
dispersion for the following variables: 2. You are the manager of a high-end ladies fashion store. For
the past few months you have been gathering data and found that 45%
of persons entering the store actually make a purchase. Assume
these data follow a Binomial Distribution and
use Excel to calculate the following binomial
probabilities: 3. Using the Salary Data Set what is the probability
of randomly selecting one individual (male or female) with
a current annual salary of over $55,000? 4. The time required to complete a project is normally
distributed with a mean of 80 weeks and a standard deviation of 5
weeks. The construction company must pay a penalty if the project
is not finished by the due date of the contract. If a construction
company bidding on this contract wishes to be 90 percent sure of
finishing by the due date, use theNORMINV Excel Function to
determine what due date (project week #) should be negotiated? 5. In a state lottery participants select 6 numbers between 1
and 49. At the end of the week, the state lottery commission
randomly draws 6 numbers between 1 and 49. How many different
possible winning number combinations could be drawn by
the lottery commission? 6. From the Salary Data Set and assuming that the
salary data is a random sample from the population of salaries from
the multi-national company use the 90% confidence level in PHStat
to estimate the mean current salary for company
executives. 7. Using the Salary Data Set, > Create a scatter plot to show this
relationship between education and beginning salary > Determine the correlation between the
variables 8. Explain why rejecting the null hypothesis does not make the
alternative hypothesis true. 9. What is the purpose of statistical inference? 10. What is the difference between sampling error and the
standard error of the mean? 11. You are a consultant working for Kaplan Consulting. The
Director of Human Resources for a multi-national company has
requested help in investigating a pay discrimination complaint
brought by a female executive. The company provided the data in
the Salary Data Set. Use PHStat and the appropriate
t test, to investigate the claim of pay discrimination in the
current salaries. Be sure to include:
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