A therapist wants to assess the effectiveness of different types of therapy animals on her patients' mood. She takes her patients (N = 10) and gets a baseline mood measure. Then she has each patient interact with either a puppy, a cat, a rabbit, or a hamster for 45 minutes (n = 2-3/condition). Immediately after, she measures her patients' mood again. She compares their moods after the interactions with their moods before the interactions, as well as between the different animal groups.  1. What is the DV?

I am having trouble solving this problem.  Can you please provide me with some help?  Thank you.  I appreciate it. Kentrex, a maker of game consoles, wants to determine whether a proposed new advertising campaign will change gamers' perception of the brand.  To conduct the test, Kentrex selected a selected a panel of 6 game players and used an extensive questionnaire to measure brand perception before and after the panel is shown the new campaign through a series of ads.  Using the before-and-after brand perception scores in the table below and assuming that the appropriate population conditions are satisfied, construct a hypothesis test of the null hypothesis that there is no difference in average before-and-after scores for the populations.  Use a significance level of 5%. player 1 2 3 4 5 6 before 47 52 67 31 62 59 after 57 54 72 37 60 68

Two classes were tested to compare the class average on the final exam. Both classes were given the same final exam. One class was allowed to use their study guide on the final and the other class was not. Identify the INDEPENDENT VARIABLE in the problem.

The pH of a liquid is a measure of its acidity or alkalinity. Pure water was a pH of 7, which is neutral. Solutions with a pH less than 7 are acidic while solutions with a pH greater than 7 are alkaline. A biologist was interested in testing the purity of lake water in Florida. A random sample of 58 lakes was taken, and the pH of water in each lake was recorded. The sample of lakes had an average pH of 6.567 with a standard deviation of 1.861.     Using a significance level of 0.01, is there evidence the mean pH of Florida lakes is not neutral?  What hypotheses should be tested?   Ho:μ=7Ho:μ=7Ha:μ<7Ha:μ<7 Ho:μ≠7Ho:μ≠7Ha:μ=7Ha:μ=7 Ho:μ=7Ho:μ=7Ha:μ≠7Ha:μ≠7 Ho:μ=7Ho:μ=7Ha:μ>7Ha:μ>7 αα =   Test Statistic: t =   (Note: round the t-score to two decimal places) probability = Select an answer 0.0818 0.0409 0.9591    decision: Select an answer Reject H₀ Fail to reject H₀  At the 0.01 level, there Select an answer is not is   significant evidence to conclude the mean pH in…

Dr. Peart randomly assigns some children to two separate groups. One group of children watches a video of an adult "beating" a doll. The other group watches a video of the same adult playing with the doll. After the video, each child is given a doll and the researchers observed what they did with the doll. In this case, the independent variable is:  i. What is the independent variable and dependent variable in this study? Name the conditions in the independent variable.  ii. If Dr. Peart wants to have 10 children in each condition, what is the total number of kids that she needs?

A small university was looking to recruit students for their golf program during Freshman orientation. Each organization would be allotted 10 minutes to give a small presentation about their program. The golf coach wants to discuss the programs golf over the past five years during his presentation. To do this, he plans to take samples of the scores from both practice rounds and games. He has recruited students from Statistics class to help him determine which statistic would be best to use to display the scores. The students have narrowed it down to four different statistics. For each statistic, the coach has taken 100 random samples of golf scores over the past five years and the statistic is calculated for each sample. Suppose the value for the population parameter he is trying to estimate is a score of 75.  ALL GRAPHS ARE IN THE ATTACHED PICTURE!! THANK YOU!! a) For each graph above, identify whether the statistic appears to have a biased or unbiased estimator of the population…

Please complete the following question. Make sure you are responding to all parts of the question.    The number of awards earned by students at one high school is recorded. Predictors of the number of awards earned include the type of program in which the student was enrolled (e.g., vocational, general or academic) and the score on their final exam in math. Variables Participant number (ID) Number of awards Program type (vocational - 1; general - 2; academic - 3 Math Score   id    num_awards    prog    math 45    1    3    41 108    1    1    41 15    1    3    44 67    1    3    42 153    1    3    40 51    1    1    42 164    1    3    46 133    1    3    40 2    1    3    33 53    1    3    46 1    1    3    40 128    0    2    38 16    1    3    44 106    1    3    37 89    1    3    40 134    1    1    39 19    1    1    43 145    0    3    38 11    1    2    45 117    0    3    39 109    1    1    42 12    1    3    45 37    1    3    40 69    0    3    40 43    1    2    43…

Suppose you were to collect data for the following pair of variables, drivers: blood alcohol level, reaction time.  You want to make a scatter plot. Which variable would you use as the explanatory variable? Blood alcohol or reaction time? Which variable would you use as the response variable? Blood alcohol or reaction time? Would you expect to see a positive or negative association? Or neither?

Paolo studies bees and honey production. He gathers data on the bee population of a honeycomb and theamount of honey produced for both wild bees and farm bees. Identify the type of study and what relationship is beingexamined.

You need to use Stata to look up the dataset and its variables. Use Stata Companion Textbook. (Dataset: NES. Variables: spend8, [pw=nesw].) The NES dataset contains spend8, which records the number of government policy areas where respondents think spending should be increased. Scores range from 0 (the respondent does not want to increase spending on any of the policies) to 8 (the respondent wants to increase spending on all eight policies). The NES, of course, polls a random sample of U.S. adults. In this exercise you will analyze spend8 using the mean and lincom commands. You then will draw inferences about the population mean. (Remember to specify nesw as the probability weight.) The spend8 variable has a sample mean of ______. Make sure you use [pw=nesw] so your results are nationally representative. There is a probability of .95 that spend8’s true population mean falls between a score of ______ at the low end and a score of ______ at the high end. A student researcher…