The table on the right gives the annual income for eight families, in thousands of dollars. Find the number of standard deviations family B's income is from the Family A B CDE FGH mean. Income 49 48 49 51 53 51 54 53 How many standard deviations is family B's income from the mean? (Round to three decimal places as needed.)

The scores and their percent of the final grade for a statistics student are given. What is the student's weighted mean score? Score Percent of final grade O Homework 82 15 Quiz 87 10 Quiz 97 10 30 Project Final Exam 97 91 35 The student's weighted mean score is (Simplify your answer. Round to two decimal places as needed.)

#8. Using Minitab to illustrate the Central Limit Theorem (CLT), the CLT tells us about the sampling distribution of the sample mean. With Minitab we can easily "sample" from a population with known properties (4,0 , shape). a. Our population consists of integer values X from 1 through 8, all equally likely Р(x) 3D 1/8; х %3D 1, 2, 3, 4, 5, 6, 7, 8 Using methods from the beginning of Chapter 4 in the textbook, find u. Use your calculator to find u. What is the shape of this probability distribution? Does it o =2.29 "look" Normal? b. Take a sample of size 3 from this population and compute the sample mean. Repeat this process 1000 times. Click on Calc > Random Data Rows 1000 Store in columns C1-C3 Distribution Integer Minimum 1 Maximum 8 Compute the mean of each sample (row) and store the sample means in C4. Note: C4 has 1000 sample means each a sample of size n=3. Click on Calc → Row Statistics O Mean Input Variables C1-C3 Store C4

Assume the data are minutes too late to statistics class of five consecutive days. X  12 23 15 9 11 What is the mean number of minutes you are late to class? Mean=

The table below gives the annual income for eight families, in thousands of dollars. Find the number of standard deviations family E’s income is from the mean. Family A B C D E F G H Income 51 53 52 50 49 50 47 48 How many standard deviations is family E’s income is from the mean? (Round to three decimal places as needed)

Below is a histogram summarizing the salaries of high school teachers at a high school with very few new teachers (in thousands of dollars). Histogram 9. 4 21 0. 50 60 70 80 High School Teacher Salaries 90 For the histogram shown, choose the statement that is TRUE. O The mean salary is equal to the median salary. O The mean salary is larger than the median salary. O The mode is $85,000 O The mean salary is less than the median salary. O The range is $70,000 e Type here to search L Count 40

Alexander Borbely is a professor at the University of Zurich Medical School, where he is director of the sleep laboratory. The histogram in the figure below is based on information from his book Secrets of Sleep. The histogram displays hours of sleep per day for a random sample of 200 subjects. Estimate the mean hours of sleep, standard deviation of hours of sleep and coefficient of variation. (Enter mean to 1 decimal place, s and CV to 2 decimal places.)

What is the FSTAT  and P-Value?

Using your calculator, find the range and standard deviation, round to two decimals places: The table below gives the number of hours spent watching TV last week by a sample of 24 children. 44 46 32 46 68 83 52 41 83 56 61 27 68 60 45 39 28 63 89 32 21 55 95 19 Range = Standard Deviation = %3D

During a weight loss study, each of eight subjects were given a diet for 4 months. Use the table, which shows the weight for the ten subjects before and after having the diet for 4 months, to answer the following questions. Refer to chart below.  What is the standard error of the mean difference? What is the standardized test statistic ts?    pound 1 2 3 4 5 6 7 8 Mean SD Weight after 4 months 168 177 196 180 229 144 197 252 192.88 34.34 Original weight 185 194 213 198 244 162 211 273 210 34.77 Difference -17 -17 -17 -18 -15 -18 -14 -21 -17.13 2.10