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:
i appreciated the mix of multiple-choice and short answer questions. i passed my exam this morning.
great to find this website, thanks
examination questions seem to be relevant.
planning to take psm test
please allow to download
please provide dumps
is the answer to question 15 correct ? i feel like the answer should be b
its getting more technical
i think these questions are what i need.
helpful assessment
i am confused about the answers to the questions. do you know if the answers are correct?
hi, please make the dumps available for my upcoming examination.
good practice
so far it is really informative
hi i want it please please upload it
am preparing for exam ,just nice questions
please upload c_tadm_23 exam
can we get tdvan4 vantage data engineering pdf?
want to clear the exam.
could you please upload the dumps of sap c_sac_2302
asm management configuration is about storage
kool thumb up
just passed the az-500 exam this last friday. most of the questions in this exam dumps are in the exam. i bought the full version and noticed some of the questions which were answered wrong in the free version are all corrected in the full version. this site is good but i wish the had it in an interactive version like a test engine simulator.
i can practice for exam
please i need this exam.
i need the dump
i want it bad, even if cs6 maybe retired, i want to learn cs6
i hate comptia with all my heart with their "choose the best" answer format as an argument could be made on every question. they say "the "comptia way", lmao no this right here boys is the comptia way 100%. take it from someone whos failed this exam twice but can configure an entire complex network that these are the questions that are on the test 100% no questions asked. the pbqs are dead on! nice work
very good materials
thanks for your support.
iam impressed with the quality of these dumps. they questions and answers were easy to understand and the xengine app was very helpful to use.
not bad but you question database from isaca
awesome contents
answer to 134 is casb. while data loss prevention is the goal, in order to implement dlp in cloud applications you need to deploy a casb.