Question

In a positively skewed distribution: a. the median is less than the mean. b. the median...

  1. In a positively skewed distribution:

a.

the median is less than the mean.

b.

the median equals the mean.

c.

the median is larger than the mean.

d.

the mean can be larger or smaller than the median.

  1. What is the mean of x, given the function below?

f(x) =(1/10) e-x/10     x 0

a.

100

b.

1,000

c.

10

d.

0.10

  1. The starting salaries of individuals with an MBA degree are normally distributed with a mean of $40,000 and a standard deviation of $5,000. What percentage of MBA's will have starting salaries of $34,000 to $46,000?

a.

38.49%

b.

76.98%

c.

38.59%

d.

50%

  1. z is a standard normal random variable. The P( z > 2.11) equals

a.

0.9821

b.

0.4821

c.

0.5

d.

0.0174

Homework Answers

Answer #1

In a positively skewed distribution is shown below.

Correct choice is c. the median is larger than the mean

The mean of the exponential distribution is  

Correct choice is c. 10.

We have The starting salaries of individuals with an MBA degree are normally distributed  

The probability,

Correct choice is b. 76.98%

The probability,

Correct choice is d. 0.0174​​​​​​​

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Which of the following would indicate that a distribution is likely to be positively skewed? the...
Which of the following would indicate that a distribution is likely to be positively skewed? the median equals the mean the distance between the minimum and median is greater than the distance from the median to the maximum the distance between the minimum and first quartile is less than the distance between the third quartile and the maximum the median is greater than the mean the distance between the third quartile and the maximum is less than the distance between...
The starting salaries of individuals with an MBA degree are normally distributed with a mean of...
The starting salaries of individuals with an MBA degree are normally distributed with a mean of $65,000 and a standard deviation of $15,000. What is the probability that a randomly selected individual with an MBA degree will have a starting salary of at least $50,000? a. 0.8772 b. 0.7486 c. 0.8293 d. 0.8413 QUESTION 11 The starting salaries of individuals with an MBA degree are normally distributed with a mean of $65,000 and a standard deviation of $15,000. What is...
QUESTION 12 The starting salaries of individuals with an MBA degree are normally distributed with a...
QUESTION 12 The starting salaries of individuals with an MBA degree are normally distributed with a mean of $90,000 and a standard deviation of $20,000. Suppose we randomly select 9 of these individuals with an MBA degree. What is the expected value of the average starting salary for these individuals? a. $70,000 b. $80,000 c. $20,000 d. $90,000 QUESTION 13 The starting salaries of individuals with an MBA degree are normally distributed with a mean of $90,000 and a standard...
True or False: a.) Variance is the mean of the squared deviation score. b.) For any...
True or False: a.) Variance is the mean of the squared deviation score. b.) For any population, a z-score of +1.00 corresponds to a location above the mean by one standard deviation. c.) In a distribution with s=8, a score of X=64 corresponds to z=-.50. The mean for this sample will be M=60. d.) Transforming X values into z-scores will not change the shape of the distribution. e.) One advantage of transforming X values into z-scores is that the transformation...
what type of distribution is described by the following information? Mean= 8.5 Median=9.0 Mode=10 A. (Left)...
what type of distribution is described by the following information? Mean= 8.5 Median=9.0 Mode=10 A. (Left) negatively skewed B. Symmetrical (Normal) C. Bimodal D. (Right) positively skewed The mean IQ score of adults is 100, with a standard deviation of 15. Use the empirical rule to find the percentage of adults with scores between 70 and 130. ( Assume the data set has a bell shaped distribution.). A. 99.7% B. 100% c. 95% D. 68% The distances (in miles) driven...
Why is the median? resistant, but the mean is? not? Choose the correct answer below. A....
Why is the median? resistant, but the mean is? not? Choose the correct answer below. A. The mean is not resistant because it is dependent upon the sample? size, n. The larger n? is, the smaller the mean becomes.? However, the median is resistant because it is not dependent on the sample? size, n. B. The mean is not resistant because when data are? skewed, there are extreme values in the? tail, which tend to pull the mean in the...
Suppose you have access to data from a skewed distribution. Answer the following true/false questions. A.)...
Suppose you have access to data from a skewed distribution. Answer the following true/false questions. A.) A five-number summary is typically better at representing the center and spread of the distribution than the mean and standard deviation. B.) It is not possible for the standard deviation to be larger than the median C.) If we add 100 to every point in our data set the IQR will change, but the standard deviation will remain the same.    D.) If we...
if the median is much closer than the mean, then the outliers in the sample must...
if the median is much closer than the mean, then the outliers in the sample must be: a. really low b. somewhat low c. close to the mean d. close to the mode e. high critical values of one directional tests are a. always lower than two directional tests b. always the same as two directional tests c. always higher than two directional tests d. it depends on the test e. it depends on the obtained value if the mode...
A researcher randomly sampled 30 graduates of an MBA program and recorded data about their starting...
A researcher randomly sampled 30 graduates of an MBA program and recorded data about their starting salaries. Of primary interest to the researcher is whether starting salaries differ based on gender. The researcher performs apooled-variance t-test of the mean salaries of the females (Population 1) and males (Population 2) in the sample. Assume α = 0.10. If the p-value = 0.1898 and a two-tail test is conducted, what is the proper interpretation for the decision of this test? A There...
Which of the following is TRUE? Select one: a. Mode is better than mean to measure...
Which of the following is TRUE? Select one: a. Mode is better than mean to measure the central tendency for categorical data. b. A data group with larger standard deviation has relatively greater variability than another data group with smaller standard deviation. c. Mean is always equal to median. d. Population variance is always equal to sample variance.
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT