STAT 200 WEEK 1,2,3,4,5,6,7,8, MIDTERM EXAM & FINAL EXAM SOLUTIONS. {GRADED A}

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 cla...

Problem 9: Which of the box plots on the graph has a large positive skew? Which has a large negative skew? Box plot B has a large positive skew and box plot C has a large negative skew. Positive skews have a long tail going either right or up where a negative skew has a large tail going to the l...

1. Assume the speed of vehicles along a stretch of I-10 has an approximately normal distribution with a mean of 71 mph and a standard deviation of 8 mph. a. The current speed limit is 65 mph. What is the proportion of vehicles less than or equal to the speed limit? 65−71 8 =−0.75 P = 22....

1. Why is a 99% confidence interval wider than a 95% confidence interval? 99% confidence interval is only slightly wider. In order to have a higher degree of confidence you need to include a larger proportion of the population. 2. A person claims to be able to predict the outcome of flipping a c...

1. You choose an alpha level of .01 and then analyze your data. a. What is the probability that you will make a Type I error given that the null hypothesis is true? 1% b. What is the probability that you will make a Type I error given that the null hypothesis is false? 0% 2. True/false: It is...

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...

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 per...

1.) A doctor wishes to estimate the mean triglyceride level of patients two hours after eating a steak dinner. To estimate the mean, you collect data from 22 patients. State the individual, variable, population, sample, parameter, and statistic. Individual: The triglyceride level of patients two ...

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 ...