in hypothesis testing, saying something is statistically significant means Select one: a. it has a test statistic that is very small.   b. it would not be expected to happen just by chance variation.   c. it would have a p-value that is greater than the chosen level of significance.   d.Both b. and c., but not a.

a.) The probability that the sample mean weight of this sample of 20 is greater than 9.75 is _____? b.) The probability that the sample mean weight of this sample of 20 is between 9.75 and 9.89 is ____? c.) There is only a 5% chance that the average weight of a sample of these 20 cheese wedges will be below _____ (answer the blanks)

Refer to the sample data for polygraph tests shown below. If one of the test subjects is randomly selected, what is the probability that the subject is not lying? Is the result close to the probability of 0.476 for a negative test result? Did the Subject Actually Lie? No (Did Not Lie) Yes (Lied) Positive test results 16 39 Negative test results 36 14 The probability that a randomly selected polygraph test subject was not lying is (Type an integer or decimal rounded to three decimal places as needed.) Is the result close to the probability, rounded to three decimal places, of 0.476 for a negative test result? because there is a 0.050 absolute difference between the probability of a true response and the probability of a negative test result.

Which of the following statements denote a random variable? A, It is a hypothetical list of the possible outcomes of a random phenomenon. B, Its value is a numerical outcome associated with a random phenomenon. C. It is any phenomenon in which outcomes are equally likely. D. It is any number that doesn't change.

Which of the following statements is correct regarding the goodness-of-fit test? Multiple Choice Population must be normal. All the expected frequencies must be different. All the expected frequencies must be equal. Variables are based on the nominal measurement scale.

You wish to test the following claim (H.) at a significance level of a = 0.005. You believe both populations are normally distributed, but you do not know the standard deviations for either. And you have no reason to believe the variances of the two populations are equal You obtain a sample - 19.1 from the first population. 7.1 from of size ni 23 with a mean of a1 You obtain a sample of size n2 the second population. 86.6 and a standard deviation of s1 20 with a mean of r2 96.5 and a standard deviation of s2 = a. What is the test statistic for this sample? test statistic = Round to 3 decimal places. b. What is the p-value for this sample? For this calculation, use p-value Use Technology Round to 4 decimal places.

In a survey, each participant indicated how much they agreed with the statement, "Hard work is the way to get what you want in life." Which of the following would you expect to have zero correlation, or close to zero correlation, with the response to the above statement? A) Agreement with the statement, "Happiness mostly depends on luck."   B) Conscientiousness score on a personality inventory test.   C) High school GPA.   D) A random number between 0 and 10, chosen by the participant.

Data was collected and placed into the following table.           Brown eyes        Blue eyes male      10                        13 female    14                        15 if someone who participated in the study is randomly selected, find the following probabilities. ( please use fractions and not decimals). A. P(Male B. P( female and brown eyes) C. P(Male or brown eyes) D. P( Female  l  blue eyes) E. P( Brown eyes  l  male) show work please!

Statistical power is related to: a. effect size b. the probability of correctly rejecting the null hypothesis c. the probability of not making a Type 1 error d. the probability of not making a Type 2 error

7. Find the point probabilities below, and show your work:a. The probability of graduating from an undergraduate degree is 80%. What is theprobability of not graduating b. 4/10 individuals get a job out of high school and 4/10 go to college. What probability ofpeople do neither? c. A jar contains 12 red marbles and 8 black marbles. Two marbles are drawn withreplacement from the jar (i.e., the first marble was put back in before the second draw).What is the probability that both of the marbles are black? d. A jar contains 12 red marbles and 8 black marbles. Two marbles are drawn withoutreplacement from the jar (i.e., the first marble was not put back in before the second draw).What is the probability that both of the marbles are black? e. The probability of finishing a 5km race is 90%. The probability of finishing a race andrunning under a 20 minute 5km race is 15%. What is the probability that a person will runa 5km race in 20 min given they finished the race? f. A man goes to the…