stat 200 (STAT200)

STAT 200 WEEK 8 HOMEWORK – 9.6/10 – 96% Question 1 (0.5 points) A team of cognitive psychologists studying the effects of sleep deprivation on short-term memory decay had eight participants stay in a sleep lab for two days. Four participants were randomly assigned to a condition in which they were not permitted to sleep during that period, while the other four participants were allowed to sleep when they wanted to. At the end of the two days, the participants completed a short-term memor...

STAT 200 SOLUTIONS MANUAL CHAPTER 2: DESCRIPTIVE STATISTICS Exercise 1. The miles per gallon rating for 30 cars are shown below (lowest to highest). 19, 19, 19, 20, 21, 21, 25, 25, 25, 26, 26, 28, 29, 31, 31, 32, 32, 33, 34, 35, 36, 37, 37, 38, 38, 38, 38, 41, 43, 43 Solution Table 1.84 Exercise 2. Solution Exercise 3. The height in feet of 25 trees is shown below (lowest to highest). 25, 27, 33, 34, 34, 34, 35, 37, 37, 38, 39,...

1. Which outcome, focused on recovery, would be expected in the plan of care for a patient living in the community and diagnosed with serious and persistent mental illness? Within 3 months, the patient will demonstrate what behavior? a. Denying suicidal ideation b. Reporting a sense of well-being c. Taking medications as prescribed d. Attending clinic appointments on time ANS: B Recovery emphasizes managing symptoms, reducing psychosocial disability, and improving role performance....

STAT 200 Week 3 Homework Problems 4.1.4 A project conducted by the Australian Federal Office of Road Safety asked people many questions about their cars. One question was the reason that a person chooses a given car, and that data is in table #4.1.4 ("Car preferences," 2013). Table #4.1.4: Reason for Choosing a Car Safety Reliability Cost Performance Comfort Looks 84 62 46 34 47 27 Find the probability a person chooses a car for each of the given reasons. Total = 84+62+46+34+47+27=30...

STAT 200 Week 5 Homework Problems 7.1.4 Stephen Stigler determined in 1977 that the speed of light is 299,710.5 km/sec. In 1882, Albert Michelson had collected measurements on the speed of light ("Student t-distribution," 2013). Is there evidence to show that Michelson’s data is different from Stigler’s value of the speed of light? State the random variable, population parameter, and hypotheses. Yes, Michelson’s data is different from Stigler’s value. Random variable: speed of light me...

STAT 200 Week 4 Homework Problems 6.1.2 ⦁ The commuter trains on the Red Line for the Regional Transit Authority (RTA) in Cleveland, OH, have a waiting time during peak rush hour periods of eight minutes ("2012 annual report," 2012). ⦁ State the random variable. X=The waiting time of the trains on the Red Line ⦁ Find the height of this uniform distribution. F(x)= 1/8-0 = 0.125 ⦁ Find the probability of waiting between four and five minutes. P(4<X<5)= (5-4)*0.125 = 0.125 ⦁ Find ...

STAT 200 Week 2 Homework Problems 2.2.2 The median incomes of females in each state of the United States, including the District of Columbia and Puerto Rico, are given in table #2.2.10 ("Median income of," 2013). Create a frequency distribution, relative frequency distribution, and cumulative frequency distribution using 7 classes. Table #2.2.10: Data of Median Income for Females $31,862 $40,550 $36,048 $30,752 $41,817 $40,236 $47,476 $40,500 $60,332 $33,823 $35,438 $37,242 $31,238 $39,150 $34...

Record your answers and work. Problem Number Solution 1 Answer: (a) (ii) Density of people per square kilometer (b) (i) All countries in the world Justification for (a) and (b): (a): A variable is the measurement or observation of the individual(s). (b): The population is the set of values of the variable for the entire group of individuals. 2 Answer: (a) (ii) Nominal (b) (iii) Mode Justification for (a) and (b): (a): Since there are no numbers, no order to the data, and you cann...

Question 1 (0.5 points) A team of cognitive psychologists studying the effects of sleep deprivation on short-term memory decay had eight participants stay in a sleep lab for two days. Four participants were randomly assigned to a condition in which they were not permitted to sleep during that period, while the other four participants were allowed to sleep when they wanted to. At the end of the two days, the participants completed a short-term memory task that yielded the results in the tabl...

Table #10.1.6 contains the value of the house and the amount of rental income in a year that the house brings in (“Capital and rental,” 2013). Create a scatter plot and find a regression equation between house value and rental income. Then use the regression equation to find the rental income a house worth $230,000 and for a house worth $400,000. Which rental income that you calculated do you think is closer to the true rental income? Why? Table #10.1.6: Data of House Value versus Renta...