In: Accounting
In a school district, all sixth grade students take the same standardized test. The superintendent of the school district takes a random sample of 26 scores from all of the students who took the test. She sees that the mean score is 130 with a standard deviation of 7.2344. The superintendent wants to know if the standard deviation has changed this year. Previously, the population standard deviation was 16. Is there evidence that the standard deviation of test scores has decreased at the α = 0.05 level? Assume the population is normally distributed.
In: Statistics and Probability
In: Accounting
Based on your career goals, what is the highest level of education-remember that's college or trade school-you plan to complete? What do you want to do when you finish high school?
How do you hope to spend your time in retirement? When will you begin saving for retirement? What will your saving strategy be?
Would you prefer to save your money in a savings account or in the bond or stock market? Why? What are the benefits and costs of these options?
In: Economics
Now assume that a larger sample of 64 student scores is taken. The sample has a mean score of 29.5 and a standard deviation of 3.2. If you were to construct a 95% confidence interval for the ACT scores of this high school class, what would the lower boundary of the interval be?
You've constructed your confidence interval. Statistically, what does this confidence interval tell us? Can it be used to tell us the true population value of the mean ACT score for this high school class? Why or why not?
In: Statistics and Probability
The Panama City Times recently conducted a survey of local high school juniors and seniors and found that 59.8% of them planned on attending Gulf Coast State College within the next 2 years. If 12 local high school students are selected randomly from this area, what the probability that fewer than 4 of them will say they plan on attending GCSC within the next 2 years?
what would my n, x and p be? using the calculator( binomcdf)
In: Statistics and Probability
a) If you have 4 cousins, what is the probability that 3 or more are male? (Assume male and female are equally likely).
b) In a normal distribution, what percent of scores are in T-score of 51 or higher?
c) If you roll two 6-sided dice, what percent of the time do both dice show numbers from 4 to 6?
d) In an elementary school, the correlation between age and height for all students in the school is _________ than the same correlation for only the fourth graders.
In: Statistics and Probability
In: Economics
Pete Morton is planning to go to graduate school in a program of study that will take three years. Pete wants to have $11,000 available each year for various school and living expenses. Use Exhibit 1-D.
If he earns 5 percent on his money, how much must he deposit at the start of his studies to be able to withdraw $11,000 a year for three years? (Round PVA factor to 3 decimal places and final answer to the nearest whole dollar.)
In: Accounting
the following question is based on the table information below.
Assume that the data is populated with records: CREATE TABLE teachers ( emp_id bigserial, first_name varchar(25), last_name varchar(50), school varchar(50), hire_date date, salary numeric); SELECT first_name, last_name, school, salary FROM teachers WHERE hiredate > '2008-01-01' ORDER BY last_name ASC;
Question 1) Will this query return an error?
Question 2) If there is an error, what is causing the error? if there is not an error, leave blank.
In: Computer Science