State whether a cumulative frequency, relative frequency, relative percent, cumulative relative frequency, or cumulative percent is most appropriate for describing the following situations. For cumulative distributions, indicate whether these should be summarized from the top down or from bottom up.
a. The number of symptoms of stress (ranging between 0 and 12 symptoms) experienced by 180 war veterans.
b. The number of calories in school lunches in a sample of 32 local middle schools.
c. The number of hours of sleep (per night) in a sample of 60 patients being treated for depression.
d. The marital status (single, married, divorced) in a sample of 96 individuals reporting high levels of life satisfaction.
e. The number of traffic violatioins ticked during a 30 month period in one of four high-crime communities.
In: Statistics and Probability
One study reports that 34% of newly hired MBAs are confronted with unethical business practices during their first year of employment. One business school dean wondered if her MBA graduates had similar experiences. She surveyed recent graduates from her school's MBA program to find that 31% of the 129 graduates from the previous year claim to have encountered unethical business practices in the workplace. Can she conclude that her graduates' experiences are different?
What is the value of the test statistic?
A. The assumptions and conditions are not met, so the test cannot proceed.
B.The test statistic is? (Round to two decimal places as needed.)
What is P-value of the test statistic?
A. P-value? (Round to three decimal places as needed.)
B. The assumptions and conditions are not met, so the test cannot proceed.
In: Statistics and Probability
In: Statistics and Probability
Assume IQ is 100 with a standard deviation of 15. An educational diagnostician wishes to determine whether learning disabled students in her school district exceed the mean IQ of 100. (Note: One criterion for learning disabled students is having IQ in the normal or above normal range). She takes a random sample of 33 students and finds a mean IQ of 108. Using alpha = .05, test the null hypothesis. Be sure to list the following: 1) Research Problem; 2) alternative hypotheses (H0, H1) 3) decisions rule 4) test statistic calculation 5) interpretation of your hypothesis test.
1) Research Problem;
2) alternative hypotheses (H0, H1)
3) decisions rule
4) test statistic calculation
5) interpretation of your hypothesis test.
In: Statistics and Probability
The Stanford-Binet Intelligence Scale is an intelligence test, which, like many other IQ tests, is standardized in order to have a normal distribution with a mean of 100 and a standard deviation of 15 points.
As an early intervention effort, a school psychologist wants to estimate the average score on the Stanford-Binet Intelligence Scale for all students with a specific type of learning disorder using a simple random sample of 36 students with the disorder.
Determine the margin of error, ?m, of a 99% confidence interval for the mean IQ score of all students with the disorder. Assume that the standard deviation IQ score among the population of all students with the disorder is the same as the standard deviation of IQ score for the general population, ?=15 points.
Give your answer precise to at least two decimal places.
?= Points
In: Statistics and Probability
Define an array named PeopleTypes that can store a maximum of 50 integer values that will be entered at the keyboard. Enter a series of 1s, 2s,3s and 4s, into the array, where a represent an infant, a 2 represent a child, a 3 represents a teenager, and a 4 represents an adult who was present at a local school function
p.412 PE 4
Write a C function that finds and displays the maximum value in a two dimensional array of integers. The array should be declared as a 10-row-by-20-column array of integers in main (), and the starting address of the array should be passed to the function.
Modify the function written in Exercise 4a so that is also displays the row and column number of the element with the maximum value
Can the function you wrote for Exercise 4a be generalized to handle any size two dimensional array.
In: Computer Science
Marina advertises her family home for sale on Trade Me and describes the house as being “in the Grammar Zone”. Eric buys the house but subsequently discovers the house is not in the Grammar zone and his children will have to go to a different school. Which TWO statements best describe Eric's legal position:
Eric may claim under s9 of the Fair Trading Act for misleading and deceptive conduct.
Eric may claim under s13 of the Fair Trading Act for false or misleading representation.
Eric has no claim under the Consumer Guarantees Act
. Eric may sue on the basis of breach of fiduciary obligation which is owed by a seller to a buyer.
This is a breach of the Consumer Guarantees Act which requires items to correspond with their description in advertisements.
Eric has no claim under the Fair Trading Act.
In: Economics
1) According to the theory of efficiency wages, paying an above-equilibrium wage may increase all of the following except
worker effort.
the natural rate of unemployment.
worker turnover.
the quality of a firm's workforce.
2) The main cause of the decline in labor force participation since
2007 is an increase in the number of
people in school.
retired workers.
discouraged workers.
disabled workers.
3) Complete the following statement.
If an economy has a large number of discouraged workers, the
unempoyment rate will remain unaffected/be low and
the employment-population ratio will be high/low
4) One explanation for the differing numbers of hours
worked in the United States and western Europe is
stronger unions in the U.S.
greater taste for leisure in the U.S.
higher taxes in Europe.
more numerous languages in Europe.
.
In: Economics
On a planet far far away from Earth, IQ of the ruling species is
normally distributed with a mean of 103 and a standard deviation of
17. Suppose one individual is randomly chosen. Let X = IQ of an
individual.
a. What is the distribution of X? X ~ N(,)
b. Find the probability that a randomly selected person's IQ is
over 85. Round your answer to 4 decimal
places.
c. A school offers special services for all children in the bottom
7% for IQ scores. What is the highest IQ score a child can have and
still receive special services? Round your answer to 2
decimal places.
d. Find the Inter Quartile Range (IQR) for IQ scores. Round
your answers to 2 decimal places.
Q1:
Q3:
IQR:
In: Statistics and Probability
1,Tesla motors has been successful (thus far) in introducing several models of all-electric cars. They have taken advantage of which of these forces?
A) Technology Advances
B) Economic Forces
c) Social Trends
D) Political and Regulatory Trends
E) All of the above.
2) UMass Medical School discover a mono-clonal antibody that could prevent rabies from developing after a bite from a rabid animal. Which of these statement is NOT true.
A) This is a great opportunity for pharmaceutical companies in the US.
B) This is a great idea since it is more effective than the existing treatments
C, This treatment is less costly than the existing treatments and would allow more people to be treated at less cost
D) The fact that rabies is endemic in India makes this an important opportunity there.
In: Economics