Babies Learn Early Who They Can Trust A study1 indicates that babies may choose not to learn from someone they don’t trust. A group of 60 babies, aged 13 to 16 months, were randomly divided into two groups. Each baby watched an adult express great excitement while looking into a box. The babies were then shown the box and it either had a toy in it (the adult could be trusted) or it was empty (the adult was not reliable.) The same adult then turned on a push-on light with her forehead, and the number of babies who imitated the adult’s behavior by doing the same thing was counted. The results are in Table 1. Test at a 5% level to see if there is evidence that babies are more likely to imitate those they consider reliable.     Imitated Did not imitate Reliable 18 12 Unreliable 10 20 Table 1 Babies imitate those they trust 1Wood, J., ‘‘Babies Learn Early Who They Can Trust,” Psych-Central, http://psychcentral.com/news/2011/12/07/babies-learn-early-who-they-can-trust/32278.html.           (a) State the null and alternative hypotheses. Your answer should be an expression composed of symbols: =,≠,<,>,μ,μ1,μ2,p,p1,p2,ρ,p^,p^1,p^2,r. Use subscripts 1 for babies imitating an adult considered reliable and 2 for babies imitating an adult considered unreliable. H0: vs Ha:Edit               (b) Give the test statistic and the p-value. Round your answers to three decimal places. test statistic = Enter your answer in accordance to item (b) of the question statement p-value = Enter your answer in accordance to item (b) of the question statement             (c) What is the conclusion?     Reject H0.   Do not reject H0.

Recent surveys of college students suggest that 40% are liberal, 40% are middle-of-the-road (MOTR), and 20% are conservative. How would you assign digits for a simulation to determine the political affiliation (liberal, middle-of-the-road, or conservative) of a college student chosen at random from the population of all college students? Select the correct assignments. Assign 1, 2 to liberal, 3, 4 to MOTR, and 5 to conservative. Assign 1, 2, 3, 4 to liberal, 5, 6, 7, 8 to MOTR, and 9, 0 to conservative. Assign 1, 2, 3, 4 to liberal, 1, 2, 3, 4 to MOTP, and 1, 2 to conservative. Assign I to liberal, 2 to MOTR, and 3 to conservative. Assign 0, 3, 5, 7 to liberal, 1, 4, 8, 9 to MOTR. and 2, 6 to conservative.

Assortative Mating: Assortative mating is a nonrandom mating pattern where individuals with similar genotypes and/or phenotypes mate with one another more frequently than what would be expected under a random mating pattern. Researchers studying this topic collected data on eye colors of 208 Scandinavian men and their female partners. The table below summarizes the results (rows represent male eye color while columns represent female eye color). For simplicity, we only include heterosexual relationships in this exercise. (Round any numerical answers to 4 decimal places if possible.) Male Blue Male Brown Male Green Total Fem Blue 52 14 14 80 Fem Brown 30 20 13 63 Fem Green 19 17 X 29 65 Total 101 51 56 208 a) What is the probability that a randomly chosen male respondent or his partner has blue eyes? b) What is the probability that a randomly chosen female respondent has blue eyes given that her partner has blue eyes? c) What is the probability that a randomly chosen female respondent…

If you have a study in which 40 participants are randomly assigned to one of the four groups, the dfbetween =