Instruction manual:
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Place up to 10 kilos of rice grain on each tray
Open the door on the back of the dryer to see the rice husk furnace
Place1 kilo of rice husk on the rice hus
Descriptive statistics
count mean sample variance sample standard deviation minimum maximum range 1st quartile median 3rd quartile interquartile range mode low extremes low outliers high outliers high
A set of data includes 75 observations. How many classes would you recommend? a. 2 b. 7 c. 9 d. 8
Solution: I would recommend eight classes with the difference of 10 as class interval 0-10 10-20 20-30
Student A B C D E F G H I J K L M N O P Q R S T U V W X
Grade 90 69 88 92 77 52 66 84 89 42 67 95 86 84 88 74 0 25 88 91 83 79 88 100
a) What is the mean (average) of the test scores? (3 decimel place
Consider the following number of defective circuit boards produced by two different machines on seven randomly selected days. Machine Defects A 2 3 7 4 5 1 0 B 2 3 4 3 4 2 4 a) To three decimel places
Pg. 218 Part I. 1. 1 2. infinite 3. discrete 4. always equal 5. infinite 6. 1 7. any of these 8. .27637 9. .47882+.46080=.93962 10. .07636-.03144=.04492 Part II. 1. In a memo to all those involved in
1. A large normally distributed population has a mean of 150 and a std. dev. Of 12 a. Find the probability that a random selected score is between 150 and 157. b. If a sample of size n = 100 is random
1 ) Patrons at a local restaruant are asked to rate the service as excellent, good, fair, or poor. The level of measurement is (3pts) Nominal Ordinal Interval Ratio Answer Incorrec : t Points: 2 2 )
1. Determine whether a probability distribution is given, if not state so. If so, determine the mean, variance, and standard deviation. a. In the following table x represents the number of children in
Pg. 191 Part I 1. 2. 3. 4. 5. 6. probability distribution probability of each random value with the value of the variable. one mean of the distribution two (2). There are two outcomes in binomial dist