For 6 months we worked with a group of 15 severely mentally handicapped individuals in an attempt to teach them self-care through imitation. For a second 6- month period, we used physically guided practice with the same individuals. For each 6-month session, we collected ratings on the level of required assistance (high 3Dbad) for each person. The data for each individual follows (on the next page). Was the assistance significantly reduced in the second 6-month period? (use alpha=D0.05) %3D

When results from a scholastic assessment test are sent to test-takers, the percentiles associated with their scores are also given. Suppose a test-taker scored at the 99th percentile for their verbal grade and at the  percentile for their quantitative grade. Interpret these results 1.This student performed better than 1% of the other test-takers in the verbal part and better than  in the quantitative part. 2,This student performed better than 99% of the other test-takers in the verbal part and better than 64% in the quantitative part. 3.This student performed better than 1% of the other test-takers in the verbal part and better than 64% in the quantitative part. 4.This student performed better than 99% of the other test-takers in the verbal part and better than  in the quantitative part.

A new cream was developed to reduce the irritation caused by poison ivy. To test the effectiveness, researchers placed an ad online asking for volunteers to participate in the study. One hundred subjects replied and were informed that one group would receive the new cream and the other group would Which of the following accurately describes the benefit of comparison in the experiment? O The overall level of irritation can be compared to see if the new cream had a significant effect. O The level of irritation for both groups can be receive a cream with no active ingredient. All 100 subjects were exposed to poison ivy. Fifty were then randomly assigned to the group with the new cream, and 50 were randomly assigned to the group with the cream with no active ingredient. After three days, the subjects' level of irritation was measured. compared to see if the new cream had a significant effect. O The level of irritation in the treatment group only can be compared to see if the new cream had…

Roy's Texaco wants to keep the price of its unleaded gasoline competitive with that of other stations in the area. Roy's is currently charging $1.29 per gallon. To check that the average price for this gasoline for all stations within 12-mile radius is higher than his price, Roy randomly samples the price of unleaded gasoline at ten stations located in this area. He obtains the following data for the price per gallon (in dollars): 1.7, 1.5, 2.6, 2.2, 2.4, 2.3, 2.6, 3.0, 1.4, 2.3 Set up appropriate hypotheses and test them using a significant level of .01.

For the following titled report, indicate whether the research study involved was exploratory, descriptive, causal or predictive, and explain your reasoning. “The Effects of Secondary Smoking on Lung Cancer Cases”

Please make sure the response is specific to the variables in this problem: Imagine that you are interested in studying the working habits of young adults. You hypothesize that persons first married in their twenties tend to work an average of 5 hours more per week than persons not first married in their twenties. After conducting a survey study, you find a relationship between participants’ age at first marriage and the number of hours worked per week. What three conditions must be satisfied for you to have established a causal connection?

Match each term below with the best description by writing the letter for the best description in the blank. Note there is one extra description that won’t be used. Column A Column A 1. subject : subject   2. response variable : response variable 3. control group : control group 4. treatment : treatment 5. lurking variable : lurking variable       Column B Column B a. the class that got the test on white paper b. a student in one of the classes c. none in this experiment d. one class may do better than the other class even if both classes get the same color of paper e. color of the paper f. whether or not a student passed the test

A research study was conducted at a local college collecting data on the models (brands) of cars parked in the student parking lot.  This type of data collected would be considered/described as Qualitative Data or Quantitative Data?

A special education teacher did research on whether or not there is a relationship between the number of students in his class and the number incidents of “acting out” behaviors exhibited by the autistic students in the classroom. He collects data for a year and aggregates them by month. He obtained the statistics below,   r= -.863 R2=.74 b= -1.212294 a= 131.176598   10.) How does the presence of more students affect the incidents in the class? a) as students are added the incidences increase b) as students are added the incidences decrease c) the number of students does not affect acting out d) the number of students caused more incidents   How much of the variability of acting out is explained by the number of students in the class?___________

See below.