Do left-handed people have better analytical skills than right-handed people? Many nineteenth-century psychologists, extrapolating from discoveries made regarding brain lateralization, believed that they do. Some psychologists have recently uncovered an article that describes a study of chess players. The study reported such things as handedness and chess rating for the players. (A chess rating is a number from 100 to about 3000 , with a higher number indicating greater expertise.) The data for the 50 left-handed players studied are summarized in the following histogram: Frequency 15- 14 13 10- 6 5+ 1100 1500 Chess rating 300 700 1900 2300 2700 Based on the histogram, draw the ogive (the cumulative frequency polygon) for the sample data. Cumulative frequency 50 40 30 20 10 [0.00 0.00 [000 [0.00 0.00 0.00 [0.00 300 700 1100 1500 1900 2300 2700

The table below shows the number of state-registered automatic weapons and the murder rate for several Northwestern states, where xx is thousands of automatic weapons and yy is murders per 100,000 residents. xx 11.3 8.2 7.1 3.7 2.9 2.2 2.1 0.6 yy 13.9 10.7 10.3 7.2 6.5 5.6 5.5 4.6 Use your calculator to determine the equation of the regression line and write it in the y=ax+by=ax+b form. Round to 2 decimal places.    According to this model, how many murders per 100,000 residents can be expected in a state with 4.6 thousand automatic weapons? Round to 3 decimal places.   According to this model, how many murders per 100,000 residents can be expected in a state with 4.4 thousand automatic weapons? Round to 3 decimal places.

The Pew Research Center conducted a survey of randomly sampled American adults, asking them about their use of social networking sites such as Facebook. The table below shows the frequency of users "liking" content on Facebook, with the data shown by gender. Does the frequency of "liking" depend on the gender of the user? Į Liking/Gender Male Female Total Every day 77 142 219 3 – 5 days/week 39 54 93 1 – 2 days/week 62 69 131 Every few weeks 42 44 86 Less often 166 182 348 Total 386 491 877 Table 1 Gender and frequency of "liking" content on Facebook Round your answer for the chi-square statistic to one decimal place, and your answer for the p-value to three decimal places. chi-square statistic = i p-value i

Would you like a cup of tea? Carole and Julius are getting ready to open a new cafe and are gathering up information about sales of different drinks in their state. They obtain data containing the yearly sales (in $1000s) for three types of tea: Darjeeling, Earl Grey, and Green Tea. A boxplot of the data and a histogram of the sales for all three teas combined is shown below. Note: Clicking on any image in this problem will open it in a new window, allowing you to enlarge the view. Tea Sales by Product Combined Tea Sales Darjeeling Earl Grey Green Tea 100 200 300 400 Product Sales in $1000 Part 1: Use the plots above to make quantitative comparisons and answer the following questions: Quantity A: The 75th percentile (Q3) of Sales for Darjeeling Tea Quantity B: The 75th percentile (Q3) of Sales for Green Tea Quantity A is greater 008 007 Frequency 00z 001 Sales in $1000

This is a SAS question. You want to randomly assign 48 subjects into two groups (Placebo and Drug). Write a DATA step to do this in such a way as to ensure there are exactly 24 subjects in each group. Can you think of how to do this so that in each group of eight subjects, there are exactly four Placebo and four Drug assignments? (Hint: Create six blocks of eight subjects each.) I know how to do the first part, it is the second part that is hard for me to figure out. Thank you!

See enclosed image.

Would you like a cup of tea? Carole and Julius are getting ready to open a new cafe and are gathering up information about sales of different drinks in their state. They obtain data containing the yearly sales (in $1000s) for three types of tea: Darjeeling, Earl Grey, and Green Tea. A boxplot of the data and a histogram of the sales for all three teas combined is shown below. Note: Clicking on any image in this problem will open it in a new window, allowing you to enlarge the view. Tea Sales by Product Combined Tea Sales Darjeeling Earl Grey Green Tea 100 200 300 400 Product Sales in $1000 Part 1: Use the plots above to make quantitative comparisons and answer the following questions: Quantity A: The 75th percentile (Q3) of Sales for Darjeeling Tea Quantity B: The 75th percentile (Q3) of Sales for Green Tea Quantity A is greater Quantity A: The median of Sales for Darjeeling Tea Quantity B: The median of Sales for Green Tea Quantity B is greater 00€ 007 Frequency > 000 008 007 Sales in…

(Additional information for Questions 24 and 25). Theory of mind (ToM) is known as a social cognitive ability in which children are able to recognize that other's have different desires, beliefs, and emotions that are different from oneself. Child on the autism spectrum tend to acquire this ability later in development than typically developing children. The psychologists wanted to examine if children on different levels of the spectrum vary on whether they are able to pass or fail a theory of mind task. After testing the 100 children they sampled on a Theory of mind task, here's what they found using the three level of AS they identified in the previous section of this section: Pass ToM Fail ToM Low AS 20 24 Middle AS High AS 12 18 10 16

The process of moving from theory to data, where the data would test the theory, is known as.......?

Doctors at a technology research facility randomly assigned people to use computer keyboards in two rooms. In one room a group of people typed a manuscript using standard keyboards, while in the other room a second group of people typed the same manuscript using ergonomic keyboards to see if those people could type more words per minute. The table shows the resulting data. Standard Ergonomic Words per Words per minute minute 12 43 38 35 21 35 28 69 18 58 45 52 40 36 42 37 52 38 19 47 24 46 63 58