Multiple choice. Image attached.A researcher wants to compare the typing speed (in words per minute) using a touchscreen keyboard vs. the speed of topping on a standard size detached keyboard. Which of the following designs would be most effective to test the hypothesis that there is no difference in typing speeds between the keyboard types? (C) 199)(189⁹)302(D) (90)(189)302(E)(59)(302)1896. A researcher wants to compare the typing speed (in words per minute) using a touchscreenkeyboard vs. the speed of typing on a standard size detached keyboard. Which of the followingdesigns would be most effective to test the hypothesis that there is no difference in typing speedsbetween the keyboard types?(A) Select 100 people who use computers and randomly divide them into two groups - onethat uses the onscreen keyboard and one that uses the detached keyboard. Have eachperson type the same passage and compare the mean words per minute of each group.(B) Select 100 people who use computers and have them select the keyboard with whichthey are most comfortable (onscreen or detached). Have each person type the samepassage and compare the mean words per minute of each group.(C) Find 50 people that use onscreen keyboards regularly and 50 people that prefer usingdetached keyboards. Have each person type the same passage and compare the meanwords per minute of each group.(D) Select 100 people who use computers and randomly divide them into two groups - onethat uses the onscreen keyboard and one that uses the detached keyboard. Observeeach person's typing for one day and compare the mean words per minute for eachgroup.(E) Select 100 people who use computers. Have each person type the same passage usingeach type of keyboard, randomly selecting which keyboard they will use first. Calculatethe difference in words per minute (onscreen - detached) for each person and determinethe mean difference.7. A cereal manufacturer is packaging collectible cards from a popular movie in each box of cereal.One card, a holographic card of a memorable scene, is more rare and occurs in only 3% of boxes.Which of the following represents the probability that the fifth box you purchase will contain yourfirst holographic card?Strive for a 5: Preparing for the Statistics AP* ExaminationCapsShiftAZWSLUEDRFS

Randomization is the technique which helps to involve all the observations in the population by…

A researcher wants to compare the typing speed (in words per minute) using a touchscreen keyboard vs. the speed of topping on a standard size detached keyboard. Which of the following designs would be most effective to test the hypothesis that there is no difference in typing speeds between the keyboard types?