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 Test Prep CFA® LEVEL 1 exam with other users:
q 105 . ans is d
i have interest to get a sybase iq dba certification
want to pass exm.
are the answers correct?
good morning, could you please upload this exam again, i need it to test my knowledge in sd-wan with version 7.0.
very nice question
i have learning disability and this exam dumps allowed me to focus on the actual questions and not worry about notes and the those other study materials.
165 should be apt
please upload the dumps, real need of them
any recent feeedback?
question number 2 is indicating you are giving proper questions. observe and change properly.
passed today.40% questions were new.litwere case study,lots of new questions on afd,ratelimit,tm,lb,app gatway.got 2 set series of questions which are not present here.questions on azure cyclecloud, no.of vnet/vms required for implimentation,blueprints assignment/management group etc
practice test
want the dumps for emc content management server programming(cmsp)
brilliant and helpful
q75. azure files is pass
very helpful
thank you for these questions. it helped a lot.
how do i get the h12-724 dumps
nice data dumps
answers are correct
good explanation
hi team just want to know if there is any update version of the exam 350-401
helpful on 2017 scrum guide
planning to attempt for the exam.
pleaseee upload
thanks ly so i have information cia
hello team, i need sap qm dumps for practice
it’s good but not senatios based
q.119 - the correct answer is b - they are not captured in an update set as theyre data.
good matter
please upload c_sacp_2308
please upload the dump. thanks very much !!
good questions