yoru5

Define resistant statistics.

1. Classify the following variables as quantitative or qualitative?

(a) A study of a speed training program for high school footballers.

(b) Gender of high school footballers.

explanatory variable definition statistics

Z-scores and standardized scores

Are standardized scroes and z-scores the same thing?

Yes

No

Consider the following distribution of scores with mean 90 and standard deviation 30. Fill in the boxes beneath the line labeled "z" with the z-scores corresponding to each position in the distributic.

Suppose you alos want to standardize these scores to a "k" scale where the mean of k is 100  and the standeard deviation is 15. Fill in the boxes beneath the line labeled "k" with the k-scores corresponding to each positivon in the distribution.

Find standard error of sample proportion where n = 30,  = 0.50.

What is the goal of learning statistics

1. In economics, firms are assumed to

(a) maximize output prices.

(b) manimize output prices.

(c) maximize profits

(d) maximize consumer surplus

2. Kip opens an account a Ltsa Goodies Store, and buys a digital music player and other items, but makes no payments on the account. To collect debt, Mako, the manger, contacts Kip's parents. This volates

(a) no federal law

(b) the fair and Accurate Credit Transactions Act

(c) the Fair Debt Collection Practices Act

(d) the Truth-in-Lending Act.

3. Laying by omission involves intentionally

(a) whihoulding materal facts

(b) creating "noise" within the communication that knowingly confuses or deceives the receiver.

(c) using highly technical language that the receiver does not understand.

(d) trying to not hurt someone's feelings.

4. All of the following are considered extrinsic motivators in Herzberg's two-factor theory EXCEPT:

(a) company policies.

(b) benefits

(c) work itself

(d) working conditions.

5. A dividend will reduce which of the following accounts?

(a) Dividends

(b) Retained Earnings

(c) Common stock

(d) Accounts payable.

6. As the test statistic becomes larger, the p-value

(a) gets smaller

(b) becomes larger 

(c) stays the same, since the sample size has not been changed

(d) becomes negative.

7. To describe the sampling distribution of the sample proportion, we use

(a) The sample proportion 

(b) The population proportion 

(c) The population mean

(d) The population mean

8. When small samples are used to estimate a population mean, in cases where the population standard deviation is unknown and the original distribution is normal:

(a) There always will be a large amount of sampling error.

(b) the t-distribution must be used to obtain the critical value.

(c) the resulting margin of error for a confidence interval estimate will tend to be fairly small.

(d) the z distribution must be used to obtain the critical value.

A statistic is said to be unbiased if

a.) it is used for only honest purposes.

b.) the survey used to obtain the statistic was designed so as to avoid even the hint of racial or sexual prejudice.

c.) both the person who calculated the statistic and the subjects whose responses make up the statistic were truthful.

d.) the mean of its sampling distribution is equal to the true value of the parameter being estimated.

how to find critical value in excel

How to calculate the z value for a confidence interval with a level of confidence of 97.8%?

Find the value of  (10)(3+5).

If the correlation coefficient r is equal to 0.596, find the coefficient of nondetermination.

a.) 0.476

b.) 0.355

c.) 0.772

d.) 0.645

What statistics are needed to draw a box plot?

Determine the level of measurement of the variable.

Letter grades in a math course.

Choose the correct level of measurement.

Nominal

Interval

 Ratio

 Ordinal

A manager is scheduling 24 employees for different shifts. If he needs to choose 8 employees for each shift, how many different groups of eight employees can he make without repetition? 

The correlation coefficient, r is a number between

0 and 1

0 and 100

0 and 10

-10 and 10

-1 and 1

Define conceptual population statistics.

What carbohydrates would give the following test results?

(a). Produces a reddish once solid with Benefits and red color with Seliweoff's reagent in 1 minute.

(b). Gives a coke charge with Benedict's test, a  light once with Seliwanoff's reagent after 5 minutes, and produces so bubbles during fermentation.

(c) Gives to color change with Benefit's or Seliweoff's test, text rums a blue color with iodine reagent.

Define simple probability.

 Astandard normal distribution has the following characteristics

(a) the mean and the variance are both equal to 1

(b) the mean and the variance are both equal to 0

(c) the mean is equal to the variance

(d) the mean is equal to 0 and the variance is equal to 1

(e) the mean is equal to the stanard deviation

Define mound shaped distribution

A random sample of 121 bottles of cologne showed an average content of 4 ounces. It is known that the standard deviation of the contents (i.e., of the population) is 0.22 ounces. The standard error of the mean equals 

(a) 4.000

(b) 0.022

(c) 0.020

(d) 0.3636

Which of the following is an example of quantitative data?

a.) The zip code of your home address

b.) The area code of your home address

c.) Your gender

d.) Your telephone number

e.) None of the above

how to find class width in statistics

A  Compute and interpret the mean of the random variable x

B Compute the standard deviation of the random variable x.

C. What is the probability that a randomly selected student has a parent involved in three activities?

D  What is the probability that a randomly selected student has a parent involved in three or four activities?

E.

In the following probability distribution, the random variable x represents the number of activities a K to the 5th-grade student is involved in.

Complete parts (a) through (f) below.

   x           0              1               2               3               4

P(x)      0.299       0.145         0.234        0.053         0.269

(a) Verify that this a discrete probability distribution.

What is the difference between class limits and class boundaries?

Which of the following cannot be a probability?

A) 1

B) 4/3

C) 0.0002

D) 85%

E) none of these

Determine whether the variable is qualitative or quantitative. Explain your reasoning.

Address

a.) The variable is qualitative because an address describes an attribute or characteristic.

b.) The variable is quantitative because an address describes an attribute or characteristic.

c.) The variable is qualitative because an address is found by measuring or counting.

d.) The variable is quantitative because an address is found by measuring or counting.

A thief steals an ATM card and must randomly guess the correct four-digit pin code from a 6-digit key keypad. Repetition of digits is allowed. What is the probability of a correct guess on the first​ try?

Define repeated sampling statistics

Determine whether the distribution is a discrete probability distribution. X P(x) 1 0.26 2 0.33 3 0.27 4 50 0.28 -0.14 Is the distribution a discrete probability distribution?

A. No, because the sum of the probabilties is not equal to 1.

B. Yes, because the sum of the probabilities is equal to 1.

C. Yes, because the sum of the probabilities is equal to 1 and each probability is between 0 and 1, inclusive.

D. No, because each probability is not between 0 and 1, inclusive.

Give the definition of the sample mean.

what is an explanatory variable in statistics

The null hypothesis for a repeated-measures test states that ____.​ ​

each individual will have a difference score of  

the overall sample will have a mean difference of  

​the entire population will have a mean difference of  

​the individuals have different means

What does sample mean?