Solution:-
14) The student performed better on history test, because the z-score for history test is greater than z-score for mathematics.
Mathematics test
Mean = 54, S.D = 3
x = 60
By applying normal distribution:-
z = 2.0
History test
Mean = 75, S.D = 2
x = 80
By applying normal distribution:-
z = 2.5
2.Heights of the Highest Waterfalls The heights in feet) of the 20 highest waterfalls in the...
The data show the heights in feet of waterfalls in Europe and in Asia. Find the 90% confidence for the difference of the means. Source: World Almanac. Round the answers to one decimal places. 487 900 1246 Europe 345 1385 984 1137 350 722 Asia 722 964 1904 Download data Use M, for the mean height of waterfalls in Europe. Assume the variables are normally distributed and the variances are unequal. <M-Hâ‚‚< < Upright vacuum cleaners have either a hard...
1) Come up with a single (one) question or problem 2) Think of an example with 30 data points a. This data needs to be of a quantitative variable (numbers). 3) Then proceed to follow the below steps. example of 30 quantitative data points Purpose State how, when, and where data was collected List of raw data pairs Frequency distribution (table) Histogram Relative percentage polygon Sample mean Sample median Sample mode(s) Sample range Sample variance Sample standard deviation Coefficient of...
Seetion 2-1 Organizing Data47 88 88 110 88 s0 69 102 78 70 55 79 85 80 100 60 90 77 55 75 55 54 60 7S 64 105 56 71 70 65 72 Souece New York Tisses Almanac 28.5 14.6 30.1 14 0.8 11.6 13 I1. GRE Scores at Top-Ranked Engineering Schools The average quantitative GRE scores for the top 30 graduate schools of engineering are listed. Construct a grouped frequency distribution and a cumulative frequency distribution with 5...
only the questions with ticks, that is question 13 and 14. Section 3-2 Measures of Central Tendency 111 Find the (a) mean, (b) median, (e) mode, and d) midrange for the distances of the home runs for obtained. (The data in this exercise will be used in Exercise 20 in Section 3-3.) and Sosa, using the data in Exercise 18 in Class boundaries Compare the means. Decide if the means are anproximately equal or if one of the players is...
The ones in the circle need help with 1. List five reasons for organizing data into a frequency about one-half of what they read, S - trust in a small portion of what they read. (Based on information fror the UCLA Internet Report) 2. Name the three types of frequency distributions, and explain when each should be used. Categorical, ungrouped Find the class boundaries, midpoints, and widths for a. 12-18 SMMMMAMMAM M M H M MMHM HM A M M...
A Waist is a Terrible Thing to Mind: The waist circumference of males 20 to 29 years ele is approximately normally distributed, with mean 92.5 cm and standard deviation 13.5 Source: M.A. McDowell. CD. Fryar.R. Hirs for Children and Adults: U.S. Population. 1999-2002. Advance data from vital and health statistics: No. 361. Hyattsville, MD: National Center for Health Statistics, 2005. d CL. Ogden, Anthropometric Reference Data 5. Draw a normal curve with the parameters labeled. 92.5 What proportion of 20-...
Here is a data set (n = 117) that has been sorted. 56.8 69.8 71.2 73.7 75.5 77. 4 78.7 80.3 81. 8 84. 5 87 88.6 92.4 59.9 70.4 72.2 74 75.6 77.5 78.7 80.5 8 2 85 87.1 88.6 92.7 61.2 70.4 72.3 74.1 75.9 77.7 78.7 80.8 82.2 85.3 87.6 88.9 92.8 62.2 68.4 70.5 70.6 72.4 72.5 74.2 74.3 76.1 76.2 77.8 77. 8 78.9 79.1 | 81 | 81.1 82.2 82.2 86.1 86.5 87.8 87.9...
A12 Appendix Concepts in Statistics 9. Electric Bille A person had the following m ahal bills for electricity. What are the mean and median of the collection of bills? January $67.92 February $59.84 March $52.00 April S52.50 May S5799 June $6535 $81.76 August September $8782 October $83.18 November $65.35 December $57.00 10. Car Rental A car rental company kept the follow ing record of the numbers of miles a rental car was driven. What are the mean, median, and mode...
19 ERA 20 Win% 21 0.021 0.028 0.028 0.530 0.038 0.432 0.03 0.022 0.026 0.554 0.028 0.542 0.570 0.620 0.740 0.504 Compute the IQR for ERA. 23 24 25 26 27 28 29 30 31 32 Question 1A Question 1B Compute the covariance between ERA and win%. Question 1C Compute the correlation between ERA and win96. 34 36 Professor Smith took a sample of 211 students from her morning class and a sample of 160 students from her evening class....
i need help on question 3 to 22 please. Midterm ex review. MATH 101 Use the following information to answer the next four exercises. The midterm grades on a chemistry exam, graded on a scale of 0 to 100, were: 62, 64, 65, 65, 68, 70, 72, 72, 74, 75, 75, 75, 76,78, 78, 81, 82, 83, 84, 85, 87, 88, 92, 95, 98, 98, 100, 100,740 1. Do you see any outliers in this data? If so, how would...