User Account

All Pages

What is the arithmetic mean for these observations

Assignment Help Basic Statistics
Reference no: EM13957805

1. The array below shows the number of days required for approval for a random selection of small business loan applications:

56    21   38   17   15   67   45   48   60   56   22   53    37      17

50    92   39   16   59   73   17   31   28   51   74   42    31

What is the arithmetic mean for these observations? (Round the calculation to two decimal places.)

a. 42.00

b. 42.78

c. 41.25

d. None of the above

2. Using the array in #1 above, calculate the median of the distribution, rounding to two decimal places.

a. 42.00

b. 42.78

c. 41.25

d. None of the above

3. Using the array in question 1 above, calculate the arithmetic mean with the single most extreme outlier removed. Round the

calculation to two decimal places.

a. 40.50

b. 40.89

c. 41.92

d. 43.85

4. The following is a five-number summary calculated from observations of the percentage of calories that come from fat in 23 items advertised as "reduced" fat from a sample of fast food chain restaurants. Form the box-and-whisker plot, select the phrase below which bests describes the shape of the distribution.

__________________________________

|   15    |       20     |       22    |         26    |           30  |

|____ |______ |______ |_______|_______|

a. Skewed slightly to the left

b. Skewed slightly to the right

c. Symmetrical distribution

d. There is not enough information given to determine the shape

5. The following data represents the processing times required to pack 20 randomly selected computer hardware orders for mailing:

5.62   16.25   11.46   8.45   5.41   11.62   7.5    4.42     7.58     7.54

5.29   10.92   21.62   8.58   11.42   7.29   7.96   10.5    9.29    8.92

What is the third quartile?

a. 10.92

b. 11.05

c. 11.42

d. 11.46

6. What is the standard deviation of the distribution of the observations in the array shown in question 11 above?

a. 0.894

b. 3.998

c. 4.199

d. 15.981

7. What is the coefficient of variation for the observations in the array shown in question 11 above?

a. 39.97 %

b. 44.15%

c. 42.61%

d. 46.94 %

8. The employees of a company were surveyed on questions regarding their educational background and marital status. Of the 600 employees, 400 had college degrees, 100 were single, and 60 were single college graduates. The probability that an employee of the company is married and has a college degree is:

a. 40/600

b. 340/600

c. 400/600

d. 500/600

9. An advertising executive is studying TV viewing habits of married men and women during prime time hours. On the basis of past viewing records, the executive has determined that during prime time, husbands are watching TV 60% of the time that their wives are also watching TV. When the husband is not watching TV, 30% of the time his wife is watching TV. What is the probability that, if the wife is watching TV, her husband is also watching TV?

a. 0.12

b. 0.24

c. 0.36

d. 0.67

10. Mothers Against Drunk Driving is a very visible group whose main focus is to educate the public about the harm caused by drunk drivers. A study was recently done that emphasized the problem we all face with drinking and driving. Four hundred accidents that occurred on a Saturday night were analyzed. Two items noted were the number of vehicles involved and whether alcohol played a role in the accident. The numbers are shown below:

                                                              Number of vehicles Involved

Did alcohol play a role?                       1         2                3        Totals

                                 Yes                       50       100            20           170

                                 No                        25        175            30           230                                                                                                    

                                 Totals                   75        275          50           400

Referring to the table above, what proportion of accidents involved more than one vehicle?

a. 50/400

b. 75/400

c. 275/400

d. 325/400

11. Referring to the table in question 20 above, what proportion of the non-alcohol related accidents were multiple vehicle accidents?

a. 50/170

b. 120/170

c. 205/230

d. 25/230

12. A company has 2 machines that produce widgets. An older machine produces 23% defective widgets, while the new machine produces only 8% defective widgets. In addition, the new machine produces 3 times as many widgets as the older machine does. What is the probability that a randomly chosen widget produced by the company is defective?

a. .055

b. .0775

c. .1175

d. .256

13. A survey is taken among customers of a fast-food restaurant to determine preference for hamburger or chicken. Of 200 respondents selected, 75 were children and 125 were adults. 120 preferred hamburger and 80 preferred chicken. 55 of the children preferred hamburger. What is the probability that a randomly selected individual is an adult?

a. 0.50

b. 0.625

c. 0.75

d. None of the above

Reference no: EM13957805

Questions Cloud

Identify the contests of each tube : Give you four samples and tell you they are lysine (an amino acid), lactose (a disaccharide), insulin ( a protein hormone), and RNA. The sample are in test tubes marked 1,2,3 and 4, but you don't know which compound is in which tube. you need to iden..
While income has increased in fiscal : While income has increased in fiscal 2012, is it clear that the company's performance has improved?
Without creating the perception of in-groups : In your opinion, can a leader maintain a personal friendship with some members of his or her work group without creating the perception of in-groups (those in his or her social circle) and out-groups (those outside his or her social circle)?
Determine the recoil speed of the target after the collision : A moving shuffleboard puck has a glancing collision with a stationary puck of the same mass. If friction in negligible, what are the speeds of pucks after the collision?
What is the arithmetic mean for these observations : Using the array in question 1 above, calculate the arithmetic mean with the single most extreme outlier removed. Round the calculation to two decimal places.
Least at the interval level of measurement : If there were 32 subjects in the experimental group and 36 subjects in the control group, why is the income data only reported for 30 subjects in the experimental group and 34 subjects in the control group?
Determine the necessary statistical data : The city council of a small town has decided to build a tennis court in the central park. Players are expected to arrive on the average of 10 sets of players per 12-hour day. Playing time is exponentially distributed with a mean of one hour. Arrivals..
Find all solutions to the ode : Find all solutions to the ODE yy'= (1-y^2) sin x. (When dividing by 1-y^2, be careful that you don't lose any solutions).
List of pros-cons for each of products under consideration : The consumer likes to save money and shops for deals on every purchase. the consumer doesn't trust advertising and insists on taking the time to do all the research himself. the consumer will make a list of pros and cons for each of the products unde..

Reviews

Write a Review

Basic Statistics Questions & Answers

  What are the appropriate null and alternative hypotheses

a clothing store chain is having a sale based on the use of a coupon. the company is interested in knowing whether the

  Find the value of the test statistic

The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.35, and the sample statistics includen=1028 subjects with 350 saying that they smoked a cigarette in the past week. Find the value of the test statis..

  If there were 2342 undergraduates how many of them had a

last years undergraduate distribution of gba was normally diatributed with a mean of 2.2 and a standard deviation of

  The weights of cats at a shelter are normally distributed

the weights of cats at a shelter are normally distributed with a mean of 11 lbs. and a standard deviation of 12. if 16

  Final project about project portfolio management

Need to make a final project about Project Portfolio Management

  Event a occurs with probability 01 and event b occurs with

event a occurs with probability 0.1 and event b occurs with probability 0.5.a what is the maximum probability that the

  What is the probability that on 10 true of false questions

what is the probability that on 10 true of false questions 4 will be correct and 6 incorrect out of plain

  The amounts a soft drink machiene is designed to dispense

the amounts a soft drink machiene is designed to dispense for each drink are normally distributed with a mean of 12.2

  Let x have the density fxx c2x 1 for 0 x 4 and fxx 0

let x have the density fxx c2x 1 for 0 ? x ? 4 and fxx 0 otherwise where c is a constant.a find the value of c that

  Discovering statistics referring to the information from my

discovering statistics referring to the information from my first question as stated nielson media research reported

  Consider a set of test grades with a mean of 80 and a

consider a set of test grades with a mean of 80 and a standard deviation of 3. use chebyshevs theorem to find the

  Find the correlation coefficient using this to predict the

given the following data setx 1 3 7 9 13 15y 1 5 8 10 11 13a. find the correlation coefficient.b. using this to predict

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +1-415-670-9521

Phone: +1-415-670-9521

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd