Statistics and Probability Basics MCQs Solution | TCS Fresco Play

0

Disclaimer: The primary purpose of providing this solution is to assist and support anyone who are unable to complete these courses due to a technical issue or a lack of expertise. This website's information or data are solely for the purpose of knowledge and education.

Make an effort to understand these solutions and apply them to your Hands-On difficulties. (It is not advisable that copy and paste these solutions).

All Question of the MCQs Present Below for Ease Use Ctrl + F with the question name to find the Question. All the Best! 


1. What is the numerical measure of average variability of a data set around the mean

Standard deviation  --  Correct


2. Which type of statistics helps us understand how the data looks like without giving much information on analysis of the data?

Descriptive statistics  --  Correct


3. Which of the following is an arithmetic mid-value?

Mean  --  Correct


4. If a class consists of 20 males and 8 females, what is the probability of drawing 4 females without replacement?

P = (8/28)(7/27)(6/26)*(5/25)  --  Correct


5. Your team has 10 members and you need 3 of them for an app development. How many possible combinations are there?

120  --  Correct


6. How many different ways can four team members from the group of fifteen be lined up for a photograph.

1365  --  Correct


7. Identify the variables that are continuous or discrete

Time & Weight are continuous. Color & Country are discrete  --  Corrects


8. When the Standard Deviation in a Normal Distribution is higher, which of the following is true?

The peak of the distribution is lower  --  Correct


9. What are the characteristics of normal distribution

The mean lies at the center of the distribution  --  Correct


10. There may be times when data is supposed to fit a normal distribution, but does not. Which of the following could be reasons for this?

Outliers and Small Sample Size  --  Correct


11. In which of these examples, binomial distribution can be used?

Probability of getting a certain number of questions correct in an exam  --  Correct


12. Which of the following characteristics correspond to a Binomial Distribution?

All the options  --  Correct


13. Which of the following conditions are satisfied by Poisson random variable?

Probability that an event occurs in a given length of time does not change over time  --  Correct


14. Which of the following can be modelled using Poisson distribution

Number of accidents that occur on a particular highway in a given month  --  Correct


15. Any statement whose validity is tested on the basis of a sample is called:

Statistical hypothesis  --  Correct


16. If a finding is statistically significant one must also interpret the data, calculate an effect size indicator, and make an assessment of practical significance

True  --  Correct


17. The probability of rejecting the null hypothesis when it is true is called:

Level of significance  --  Correct


18. After a clinical trial, it is concluded that both drugs A and B are equally effective. What type of a hypothesis is this?

Null hypothesis  --  Correct


19. The significance level is the risk of:

Rejecting H0 when H0 is correct  --  Correct


20. If you reject H0 but H0 is true, what type of error has occurred?

Type I  --  Correct


21. Assuming innocence until proven guilty, a Type I error occurs when an innocent person is found guilty

True  --  Correct


22. Which variable represents the actual Type I error?

P- value  --  Correct


23. A Type I error is also known as a ______.

False positive  --  Correct


24. A passing student is failed by an examiner, it is an example of:

Type-II error  --  Correct


25. The shape of the t-distribution depends upon the:

Degrees of freedom  --  Correct


26. Which of the following is not the purpose of student's t-distributions?

When modelling the actual number of failures in a trial  --  Correct


27. Which of the following is not the purpose of using chi-square distributions?

To test how closely data follows a non-normal distribution  --  Correct


28. What of the following is not a characteristic of F-distribution curve?

The curve is left skewed  --  Correct


29. The ANOVA is a statistical test that is used to compare how many group means?

Two or more  --  Correct


30. A post hoc test is:

A follow-up test to the ANOVA when there are three or more groups  --  Correct


31. A statistical test used to compare 2 or more group means is known as:

One-way analysis of variance  --  Correct


32. A statistician calculates a 95% confidence interval for Mean when Standard Deviation is known. The confidence interval is Rs.18000 to Rs.22000, the amount of the sample mean is:

20000  --  Correct


33. The p-value in statistical significance testing should be used to assess how strong a relationship is. For example, if relationship A has a p=.04 and relationship B has a p=.03 then you can conclude that relationship B is stronger than relationship A.

False  --  Correct


34. The use of the laws of probability to make inferences and draw statistical conclusions about populations based on sample data is referred to as 

Inferential statistics  --  Correct


35. In which examples could binomial distribution be used?

Modelling the number of failures in a trial  --  Correct


36. A good way to get a small standard error is to use a ________.

Small sample  --  Wrong


37. Any hypothesis which is tested for the purpose of rejection under the assumption that it is true is called?

Null hypothesis  --  Correct


38. Confidence interval become narrow by increasing the:

Sample size  --  Correct


39. An advertising agency wants to test the hypothesis that the proportion of adults in a country who read a Sunday Magazine is 25 percent. The null hypothesis is that the proportion reading the Sunday Magazine is:

Equal to 25%  --  Correct


40. The analysis of variance is a statistical test that is used to compare how many group means?

Two or more  --  Correct


41. Identify which of the following steps would not be included in hypothesis testing.

Eliminate all outliers  --  Correct


42. An essential component of the Central Limit Theorem is that

The average of sample means will be the population mean.  --  Wrong


43. A failing student is passed by an examiner, it is an example of:

Type-II error  --  Wrong


44. The dividing point between the region where the null hypothesis is rejected and the region where it is not rejected is said to be

Critical value  --  Correct


45. A door alarm works in 72 out of 100 cases and surveillance camera works in 68 out of 100 cases. What is the probability of effective screening techniques keeping in mind that these two methods can be used together?

0.49  --  Wrong


If you have any queries, please feel free to ask on the comment section.

If you want MCQs and Hands-On solutions for any courses, Please feel free to ask on the comment section too.

Please share and support our page!

Post a Comment

0Comments
* Please Don't Spam Here. All the Comments are Reviewed by Admin.
Post a Comment (0)

#buttons=(Accept !) #days=(20)

Our website uses cookies to enhance your experience. Learn More
Accept !