You are given n = 12, sum of the (X_i) = 2%, sum of the (X_i)^2 = 0.5%%. Find the sample standard deviation.
Answer(s): C
The sample standard deviation will be the positive square root of the sample variance. The sample variance will be determined using the computational formula [1/(n-1)] * {sum (as i goes from 1 to n) of (X_i)^2 - (1/n) * [sum (as i goes from 1 to n) of (X_i)]^2}. So we get 1/11 * (0.5 - 1/12*(2^2)) = 1.51%%. The positive square root of 1.51%% is 1.23%.
Sharleef Nettleton, a quantitative analyst with Churn Brothers Brokerage, is examining a data sample and has amassed the following information:Standard deviation of the sample: 2.90Number of observations: 68Degrees of freedom: 2Sample mean: 114Assume that Ms. Nettleton formulates a null hypothesis that states that the value of the population mean is zero. Additionally, assume that the population standard deviation is unknown. Given this information, what is the standard error of the estimate? Further, what is the test statistic? Choose the best answer.
Answer(s): D
If the population standard deviation is unknown, as in this example, the standard error of the estimate is found by using the following equation:{Standard error = s / square root of n} where s = the sample standard deviation and n = the number of observations in the sample.In this example, all of the necessary information has been provided, and the determination of the standard error of the estimate is found as:{Standard error = [2.90 / 8.2462] = 0.3517}Now that the standard error of the estimate has been calculated, the test statistic can be found by using the following equation:{Test statistic = [sample statistic - value of the population parameter under the null hypothesis] / standard error of the sample statistic].Again, all of the necessary information has been provided, and the calculation of the test statistic is found as follows:{Test statistic = [114 - 0] / 0.3517 = 324.14}This is a very large test statistic and the null hypothesis will likely be rejected unless a very low level of confidence is employed.
If all the 10,000 data points in a regression lie exactly on a straight line, which of the following is/are true?
Answer(s): E
Since there is no error in the regression, the percentage of unexplained variance will be zero. The intercept and slope terms can be any real numbers and the correlation coefficient will be either + 1 or - 1.
Which is true of a leptokurtic distribution?
Answer(s): B
I and IV are true of leptokurtic distributions. This is also called having "excess kurtosis." II and III are characteristic of platykurtic distributions.
An experiment may have:
Answer(s): A
Experiments may have many outcomes.
Share your comments for Financial CFA Level 1 exam with other users:
very useful
physical tempering techniques
its giving best technical knowledge
please upload
great question with explanation thanks!!
does this exam have lab sections?
please upload the braindump for .net
i need this exam 1z0-1107-2. please.
very useful!
for this question - "which three type of basic patient or member information is displayed on the patient info component? (choose three.)", list of conditions is not displayed (it is displayed in patient card, not patient info). so should be thumbnail of chatter photo
q52 should be d. vm storage controller bandwidth represents the amount of data (in terms of bandwidth) that a vms storage controller is using to read and write data to the storage fabric.
nice questions
question # 208: failure logs is not an example of operational metadata.
good questions
thank you for the test materials!
its very helpful
good questons
i need the dumb of the hcip security v4.0 exam
upload the dump please
yes, iam looking this
please upload cima e2 managing performance dumps
wonderful questions
i used this site since 2000, still great to support my career
why is the answer to "which of the following is required by scrum?" all of the following stated below since most of them are not mandatory? sprint retrospective. members must be stand up at the daily scrum. sprint burndown chart. release planning.
great job. hope this helps out.
upload please. many thanks!
this is so interesting
great material thanks
anyone who wrote this exam recently
ok they re good
relevant questions