What does the (1-) mean?

What does power curve shows?

15) Fine the sum of products (SP) and sum of squares (SS) for the variables of interest mentioned in the study above. Then find the correlation between the two variables of interest. (Round all answers to 2 decimal points) a) SP = b) SSbullying =  c) SSprejudice =  d) r =

Why is chi squared being found for 1-alpha and not 1-alpha/2

How much more likely are alcoholics to say sober for a year after counseling if their best friend is not an alcoholic vs. if their best friend is an alcoholic?  A researcher tracked 747 alcoholics whose best friends were not alcoholics and 517 alcoholics whose best friends were alcoholics.  A year later 570 of those whose best friends were not alcoholics stayed sober for the year and 207 of those whose best friends were  alcoholics stayed sober for the year. 1. Come up with the 99% confidence interval for the difference.  Round your answers to four decimal places and present your answers as proportions rather than percents.  ( __________ , ____________ )

A research study was conducted about gender differences in 'sexting'. The researcher believed that the proportion of girls involved in 'sexting' is different from the proportion of boys involved. The data collected in the spring of among a random sample of middle and high school students in a large school district in is summarized next: out of 380 females 43 sent 'sexts' and out of 410 males 64 sent 'sexts'. Is the proportion of girls sending sexts different from the proportion of boys 'sexting'? Choose the appropriate procedure. Procedure:         Assumptions: (select everything that applies) Population standard deviations are known Normal populations Sample sizes are both greater than 30 Population standard deviation are unknown but assumed equal Paired samples Population standard deviation are unknown Simple random samples The number of positive and negative responses are both greater than 10 for both samples Independent samples

Researchers were interested in assessing whether stress levels at the beginning of the semester are related to (i.e., correlated with) stress levels during finals week. To test this, stress was measured in 5 students at the start of the semester and then again at the end of the semester during finals week.     Participant Stress 1 Stress 2 (X - MX) (Y - MY)  (X - MX) (Y - MY) (X - MX)2 (Y - MY)2  1 22 22 -4.4 -6       2 32 34 5.6 6       3 24 25 -2.4 -3       4 28 30 1.6 2       5 26 29 -0.4 1         What is the observed correlation coefficient (i.e., r value)?

If P(A) = 0.5, P(B) = 0.4, and P(A^ B) = 0.25, then P(AUB) = 0.35 0.15 0.65 0.9

In 2001, the polls found that 81% of American adults believed that there was a conspiracy in the death of President Kennedy. Assume a recent poll asked 1160 American adults if they believe there was a conspiracy in the assassination and it found that 897 believe there was a conspiracy. Does the data show that the proportion of Americans who believe in this conspiracy is now lower? Test at the 9% level.      What is the correct parameter symbol for this problem?  What is the wording of the parameter in the context of this problem? Fill in the correct null and alternative hypotheses:

An "extraneous variable" is not a problem unless it with the independent variable O is identical systematically co-varies is not correlated Wait! An "extraneous variable" is by definition never a problem, that's what "extraneous" means.