Use the data below to find the
X {15 18 6 17 10 8 18 10 5 19 23}
MEan =
Mode=
Median =
First we arrange given data in ascending order
X : 5 , 6, 8, 10, 10 , 15 ,17 , 18, 18 , 19 ,23
1) Mean = sum / number of observations
= 149/11
Mean = 13.55
2) Mode is the maximum frequency of observation
Here 10 and 18 have same highest frequency
So mode = 10 and 18
3) Median is observation that divides data into two equal parts
Median = (n + 1)/2 th observation
Median = 6 th observation
Median = 15
8. Calculate the mean, median and mode of the following frequency distribution Frequency(f) Weight(x) 15 17 19 21 23 25 7
Alcohol Placebo 9 8 10 8 11 9 12 16 13 11 15 11 17 12 19 13 20 15 21 15 What is the mean, median, mode, and standard deviation for the alcohol group? what is the mean median, mode, and standard deviation for the placebo group? what is the most appropriate graph to use for the placebo group?
For the data listed(assume sample). a.) Find the following: Mean Mode Median Midrange Range Quartiles Variance Standard Deviation BoxPlot b.) Create a frequency distribution When creating classes use the formula from the Notes on how classes to create. 17 23 14 16 12 26 20 22 14 15 22 18 18 21 21 19 15 21 18 17 15 25 14 30 16 10 20 12 16 17.44 16 14 15 20 20 16 17 16 15 15 19 48...
Below are data for the first homework in a Psychology class: x f(x) 5 15 17 19 21 23 25 1 1 1 2 3 2 2 a) Find the mean. b) Find the range. c) Find the proportion for a score of 25. d) Find the proportion for a score of 5.
14/ For the data set 8, 6, 29, 3, 9, 23, 15, 18, 5, 3, 22, 27, 4, 2 and 22 the midrange is A./ 16 B/ 11 C/ 15 D/ 18 15/ By the Empirical Rule, in a city of 62,000 people, the number of people below the mean by more than 1 standard deviation is: A./ 41,160 B/ 9, 920 C/ 21,080 D/ 6,200 Questions 16-18 : Use the distribution in the form of the stem-leaf plot. Stem...
Groups 2-4 4-6 6-8 2-4 4-6 6-8 8-10 10-12 12-14 14-16 16-18 18-20 f f 102 18 40 24 47 80 21 15 66 Find a) Arithmetic mean b) Median c) Mode d) Differentiate between Arithmetic mean, Harmonic mean, and Geometric mean using 2 applications of each.
1. Consider the following POPULATION of quiz scores {18, 23, 7,
20, 15, 12, 6, 23, 17, 16 }
Compute the following: the mean ,μ, the variance, σ2, the
standarddeviation, σ.
State the mode, if one exists __________
ApplytheEmpiricalRuleatthe95%level.
What percentage of these Quiz Scores actually lie within the
interval found in part c? _________________________
II. Again consider the given Quiz Scores: {18, 23, 7, 20, 15,
12, 6, 23, 17, 16 }
Determine Q1, the median, and Q3:
Draw...
#17
please
For 17 - 20, use the data in the table at the right. 17. Identify the outlier(s) in the data. 18. Calculate the mean with and without the outlier(s). Round to the nearest tenth if necessary. 19. Describe how the outlier(s) effect(s) the mean. 20. State the mode of the data. Name Peter Jenise Crystal Jeremy Mike Nathan Lost Socks 2 3 2 15 4 6
xremember to round to nearest whole number) a) 10 7) b) 13 c) 15 d) 8 Median a) 85 8) b) 4.5 c) 1 d) 3 b) 46% 9) What % of the data is greater than 7? a) 35 % c) 50% d) 25% Given the following raw data 414,21,22,30,25,27,27,18,12) construct a grouped frequency distribution with the first class being 12-15 and equal class widths lower limit-upper limit class f 3 5 b) 5 c) 4 d) 1 10)...
2. Consider the following time series data: 2Month Value 20 15 23 6 4 13 6 18 25 10 8 10 9 24 12 10 21 13 19 14 15 la. Use a α # 0.25 to compute the exponential smoothing values for the time series. Compute MSE and a forecast for Month 12. b. Compare the two-month moving average forecast with the exponential smoothing forecast using a 0.25. Which appears to 17 provide the better forecast based on MSE?...