Give a mean of 20 & standard deviation of 2. which of the following value is an outliner?

A. none

B. 13

C. 25

D.17

Expert Solution

We see that the ourliers lie more than 3 standard deviations away from the mean hence option B is correct as 13 is more than 3 SD away from 20.

jeff jeffy answered 2 years ago

Which mean, standard deviation, and x-value set corresponds to a z-score of -2? a.) x-value =...

Which mean, standard deviation, and x-value set corresponds to a z-score of -2? a.) x-value = 35 mean = 21 standard deviation = 7 b.) x-value = 80 mean = 90 standard deviation = 10 c.) x-value = 50 mean = 60 standard deviation = 5 d.) x-value = 89 mean = 80 standard deviation = 9

In which of the following sets of values is the mean equal to the standard deviation?...

In which of the following sets of values is the mean equal to the standard deviation? Group of answer choices 2, 4, 6, 8, 9 4, 7, 8, 8, 12 0, 2, 4, 6, 13 2, 4, 5, 9, 11

Estimate the true mean and standard deviation of the following data. (20 days, 5 samples in...

Estimate the true mean and standard deviation of the following data. (20 days, 5 samples in each day) Day x1 x2 x3 x4 x5 1 839 585 583 613 768 2 706 527 956 644 612 3 322 614 807 282 170 4 1001 904 419 522 430 5 259 811 847 603 572 6 681 523 665 397 873 7 799 874 553 173 296 8 263 585 546 445 455 9 591 637 739 927 825 10 372...

Give a mean and standard deviation that would indicate a majority of children are on their...

Give a mean and standard deviation that would indicate a majority of children are on their phones between 1.3 and 3.3 hours a day. What is the relationships of a critical value to an observed value in a t test and ANOVA? Where do you find them and what do they mean? Is it possible that you could satisfy both p < .01 and p< .05? Is it possible to only have one or the other exclusively? Explain. What are...

Item Sample Mean 1 Population standard deviation of 1 n1 Sample Mean 2 Population Standard Deviation...

Item Sample Mean 1 Population standard deviation of 1 n1 Sample Mean 2 Population Standard Deviation 2 n2 7 18 6 169 12 12 121 0.01 Perform a Two-tailed hypothesis test for two population means.

Write mu for the mean of a Normal distribution. The value of the standard deviation is...

Write mu for the mean of a Normal distribution. The value of the standard deviation is unknown. We want to test H0: mu = 8 vs H1: mu > 8. A random sample of 15 observations is taken from this distribution, and the sample mean (x-bar) and sample standard deviation (s) are calculated. Then t = (x-bar - 8)/[s/square_root(15)] is calculated, and is found to equal = 1.85. At what levels of significance could we reject H0

Given a random variable ? has population mean ? = 20 and standard deviation ? =...

Given a random variable ? has population mean ? = 20 and standard deviation ? = 5. a.) For the sampling distribution of the sample mean ?, for ? = 50 trials what are the mean and standard deviation? ??bar = _____________, ??bar =_____________. b.) What is the probability that the sample mean will be in the interval 19 < ?bar < 21 ? ?(19 < ? < 21) =_____________. (give answer to at least 4 signifiant figures.)

In a research conducted on a sample of size 20, the mean and standard deviation obtained...

In a research conducted on a sample of size 20, the mean and standard deviation obtained are 88.4 and 28.97. Assuming that the population distribution follows normality, find a 99% confidence interval for the true mean. What is the sample mean value? Which distribution is used in this case? What is the Maximal Margin of Error? What is the confidence interval?

For a normally distributed population with a mean of 450 and standard deviation of 20 answer...

For a normally distributed population with a mean of 450 and standard deviation of 20 answer the following questions. BLANK #1: What is the probability of finding a value below 411.2? (ANSWER IN DECIMAL FORM TO 4 DECIMAL PLACES) BLANK #2: What percent of values are above 476.6? (ANSWER AS A PERCENT TO 2 DECIMAL PLACES...INCLUDE PERCENT SIGN WITH ANSWER) BLANK #3: The bottom 20% of observations are below what value? (ANSWER TO 2 DECIMAL PLACES) BLANK #4: What value...

Suppose x has a distribution with a mean of 80 and a standard deviation of 20....

Suppose x has a distribution with a mean of 80 and a standard deviation of 20. Random samples of size n = 64 are drawn. (a) Describe the x distribution and compute the mean and standard deviation of the distribution. x has distribution with mean μx = and standard deviation σx = . (b) Find the z value corresponding to x = 75. z = (c) Find P(x < 75). (Round your answer to four decimal places.) P(x < 75)...

Question