Homework Answers
(A) Option(b): 0.5
>> X is normally distributed with mean 20 and standard deviation 1.
A normal distribution is symmetric about the mean. So, half of the data will be less than the mean 20 and half of the data will be greater than the mean 20. Therefore, the probability that the X is greater than 20 is 0.5 or P(X > 20) = 0.5
(B) Option(a): histogram
>> A frequency table shows how often each different value in a set of data occurs. A histogram is the most commonly used graph to show frequency table.
3. Let X N(20,1). What is P(X > 20) ? a) 0.25 b) 0.5 c) 0.75...
3. Let X N(20,1). What is P(X > 20) ? a) 0.25 b) 0.5 c) 0.75 d) 0.99
If one wants to test whether there is a difference in mean scores before and after...
If one wants to test whether there is a difference in mean scores before and after an exam, which will be an appropriate test to use? a) one sample z test b) one sample t test c) paired t test d) two sample independent t test If X is a random variable following a Uniform(a,b) distribution, which option represents an approxi- mate shape of its density function? a) straight vertical line between a and b b) straight horizontal line between...
4. If the data is in the form of a frequency table, it is best described...
4. If the data is in the form of a frequency table, it is best described using a: a) histogram b) pie-chart c) stem and leaf plot d) boxplot
A student asked 100 randomly selected teenagers, ages 14 – 16, what their favorite day of...
A student asked 100 randomly selected teenagers, ages 14 – 16, what their favorite day of the week is. The student wants to present the data graphically. Which graphical presentation is appropriate in this case? Select all that is appropriate. Group of answer choices Pareto Chart Boxplot Bar Graph Stem and Leaf Plot Frequency Histogram Pie Chart Time Series Chart Dot Plot
14) Explain why the following bar graph is misleading and how you would fix it. (Hint:...
14) Explain why the following bar graph is misleading and how you would fix it. (Hint: Section. 2.3 #25) 3.00 52.50 $2 00 $1 50 51 08 MILK 51 00 0 10 Fal 2011 11) Histograms are very important to identify the 'shape' of a quantitative dataset. 4 A) Which histogram would be described as fairly bell-shaped? B) Which histogram would be described as fairly uniform? C) Which histogram would be described as skewed to the right or skewed positively?...
12 a and b 12. A distribution has a skewness of-0.14 and a kurtosis of +0.09...
12
a and b
12. A distribution has a skewness of-0.14 and a kurtosis of +0.09 a. Draw approximately what this distribution should look like. b. What terms would you use to describe this distribution? 13. Build a stem-and-leaf plot for the sibling age data in Table 3.1 14. Create a pie chart showing the percentage of subjects in Table 3.1 who gave each r the language development data in the Waite et al. (2015) study 15. The following data...
Math shown is statistics 2.2 Graphical Methods for Describing Quantitative Data 1. Consider the stem-and-leaf display...
Math shown is statistics
2.2 Graphical Methods for Describing Quantitative Data 1. Consider the stem-and-leaf display below, leaf unit-0.1 Stem Leaf 0 012 1 2248 2 1134599 3 00036 4 457 5 13 How many observations in the data set? How do you decide? yhe mwntbers a) b) Re-create all numbers, order them in descending order. c) Construct a dot plot. The following relative frequency table is for a data set of 300 observations. a) 2. Fill the frequency column...
2:33 LTE X Statistics first homework.pdf 1 Descriptive Statistics Data 20 25 40 41 42 43...
2:33 LTE X Statistics first homework.pdf 1 Descriptive Statistics Data 20 25 40 41 42 43 44 45 46 47 48 49 50 50 51 52 53 54 55 56 57 58 59 60 65 80 90 For the data above calculate and draw the following: a. A Frequency Diagram with 7 classes b.A Histogram A Stem and Leaf Diagram. Don't forget the instruction d. The Five Number Summary e. The Box and Whisker Plot which needs the IQR, the...
Name: KDonovan Course: MATH 1109 Assignment 1 PART I (to be done by hand) 1. Below...
Name: KDonovan Course: MATH 1109 Assignment 1 PART I (to be done by hand) 1. Below is a histogram of the shear strengths (in pounds per weld) for 94 samples of a certain material MTB GStd. MTB >Histogram ci. Character Histogram Histogram of C1 N 94 Midpoint Count (a) Comment on the shape of the histogram. (b) What class width is used in the histogram? (c) Find the class boundaries of the 3h class. 138 140 142 144 146 148...
1) The following stem and leaf plot displays the number of home runs allowed per nine...
1) The following stem and leaf plot displays the number of home runs allowed per nine innings for all pitchers in 1999 who pitched at least 100 innings. Stem (1=0.1 HR/9IP) Leaf (1=0.01 HR/9IP) Stem (1-0.1 HR/91P) Leaf (1=0.01 HR/91P) 37 13 0023667888 45 14 001234777899 50278 15 0111334569 6 0355667799 16 023378 7003345999 174 8 001336888999 18 357 9 02333445567788899 19 2234 1000001334455567799 20 11 | 11223344555569 21 120122233444466789 220 10 a) How many data values are in this...
3. Let X N(20,1). What is P(X > 20) ? a) 0.25 b) 0.5 c) 0.75 d) 0.99
4. If the data is in the form of a frequency table, it is best described using a: a) histogram b) pie-chart c) stem and leaf plot d) boxplot
14) Explain why the following bar graph is misleading and how you would fix it. (Hint: Section. 2.3 #25) 3.00 52.50 $2 00 $1 50 51 08 MILK 51 00 0 10 Fal 2011 11) Histograms are very important to identify the 'shape' of a quantitative dataset. 4 A) Which histogram would be described as fairly bell-shaped? B) Which histogram would be described as fairly uniform? C) Which histogram would be described as skewed to the right or skewed positively?...
12
a and b
12. A distribution has a skewness of-0.14 and a kurtosis of +0.09 a. Draw approximately what this distribution should look like. b. What terms would you use to describe this distribution? 13. Build a stem-and-leaf plot for the sibling age data in Table 3.1 14. Create a pie chart showing the percentage of subjects in Table 3.1 who gave each r the language development data in the Waite et al. (2015) study 15. The following data...
Math shown is statistics
2.2 Graphical Methods for Describing Quantitative Data 1. Consider the stem-and-leaf display below, leaf unit-0.1 Stem Leaf 0 012 1 2248 2 1134599 3 00036 4 457 5 13 How many observations in the data set? How do you decide? yhe mwntbers a) b) Re-create all numbers, order them in descending order. c) Construct a dot plot. The following relative frequency table is for a data set of 300 observations. a) 2. Fill the frequency column...
2:33 LTE X Statistics first homework.pdf 1 Descriptive Statistics Data 20 25 40 41 42 43 44 45 46 47 48 49 50 50 51 52 53 54 55 56 57 58 59 60 65 80 90 For the data above calculate and draw the following: a. A Frequency Diagram with 7 classes b.A Histogram A Stem and Leaf Diagram. Don't forget the instruction d. The Five Number Summary e. The Box and Whisker Plot which needs the IQR, the...
Name: KDonovan Course: MATH 1109 Assignment 1 PART I (to be done by hand) 1. Below is a histogram of the shear strengths (in pounds per weld) for 94 samples of a certain material MTB GStd. MTB >Histogram ci. Character Histogram Histogram of C1 N 94 Midpoint Count (a) Comment on the shape of the histogram. (b) What class width is used in the histogram? (c) Find the class boundaries of the 3h class. 138 140 142 144 146 148...
1) The following stem and leaf plot displays the number of home runs allowed per nine innings for all pitchers in 1999 who pitched at least 100 innings. Stem (1=0.1 HR/9IP) Leaf (1=0.01 HR/9IP) Stem (1-0.1 HR/91P) Leaf (1=0.01 HR/91P) 37 13 0023667888 45 14 001234777899 50278 15 0111334569 6 0355667799 16 023378 7003345999 174 8 001336888999 18 357 9 02333445567788899 19 2234 1000001334455567799 20 11 | 11223344555569 21 120122233444466789 220 10 a) How many data values are in this...
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