5. O The Colorado State Legislature wants to estimate the length of time it takes a resident of Colorado to earn a Bachelor's degree from a state college or university. A random sample of 265 recent in-state graduates was surveyed. a. Identify the variable of interest. b. Is the variable quantitative or qualitative (numerical or categorical)? c. What is the implied population?

1. Explain the difference between z-tests (which use categorical data), and t-tests (which use numerical data). 2. Conduct a t-test, both when given statistics, and when given data. 3. Conduct a t-test, 2-sample t-test, and paired t-test. 4. Differentiate between the five types of tests we have learned so far.

. Control charts are classified by the     a.  shape of the distribution.     b.  type of data they contain.     c.  null hypothesis.     d.  sample size.

(a) Determine the population mean pulse. The following data represent the pulse rates (beats per minute) of nine students enrolled in a statistics course. Treat the nine students as a population. Complete parts (a) through (c). The population mean pulse is approximately beats per minute. (Round to one decimal place as needed.) Student Pulse O Perpectual Bempah 81 Megan Brooks Jeff Honeycutt 75 75 Clarice Jefferson 84 Crystal Kurtenbach 90 Janette Lantka 71 Kevin McCarthy 67 Tammy Ohm 71 Kathy Wojdya 85

There are 15 numbers on a list, and the smallest number is changed from 4 to 0.4.a) Is it possible to determine by how much the mean changes? If so, by how much does it change?b) Is it possible to determine the value of the mean after the change? If so, what is the value?c) Is it possible to determine by how much the median changes? If so, by how much does it change?d) Is it possible to determine by how much the standard deviation changes? If so, by how much does it change

7. Wondering if there is a connection between a person's height and the number of tattoos they have, Mac asks 50 people how tall they are and how many tattoos they have. What type of study was used? a. Experimental b. Observational

Find the population mean or sample mean as indicated. Population: 6, 9, 3, 12, 14, 16 O A. x=11 OB. x= 12 O C. µ= 13 ΟD. μ= 10

The percentage (rounded to the nearest whole percent) of persons from each state completing 4 years or more of college is listed below. 23 24 26 14 30 36 34 28 26 22222NENN FREEBENENE 25 57 27 23 24 28 23 AN 28 24 a. Mean = 31 27 21 25 a. b. 24 34 C. 37 d. 38 e. 33 19 yes O no 27 21 ANNNNNN 33 24 30 24 25 24 26 21 b. Median = c. Mode = d. Sample Standard Deviation = places) e. Population Standard Deviation 25 places) f. Five-Number Summary: g. Interquartile Range h. Lower Fence = 2NN2852428 31 29 15 26 i. Upper Fence = j. Are there outliers in the data? = (round to one decimal place) (round to three decimal (round to three decimal

The set of all possible values of a sample statistic is called a   A. simple random sample. B. point estimate. C. census. D. sampling distribution.

1. A researcher is interested in the texting habits of high schools students in the United States. The researcher selects a group of 200 students, measures the number of text messages that each individual sends each day (for a single week), and calculates the average number for the group. a. Identify the population for the study. b. Identify the sample for this study. c. The average number calculated is an example of what?