There is concern about the speed of automobiles traveling over a particular stretch of highway For a random sample of 28 automobiles, radar indicated the followingspeeds in miles per hour.59 63 68 57 55 72 58 69 52 55 61 67 51 59 O53 64 58 57 66 61 65 70 63 65 57 56 61 59a Check for evidence of nonnormality.b. Find a point estimate of the population mean that is unbiased and efficient.c Use an unbiased estimation procedure to find a point estimate of the variance of the sample mean.

Given data : 59,63,68,57,55,72,58,69,52,55,61,67,51,59,53,64,58,57,66,61,65,70,63,65,57,56,61,59…

Answered: There is concem about the speed of…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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It is considered quite common to have feet of unequal length. In a sample of 10 healthy college students the right-foot and left-foot lengths are given (in mm). Length in mm mean ss Left foot (xx) 268 274 258 259 256 256 264 263 269 270 263.7 6.3779132776932 Right foot (yy) 247 281 249 259 231 273 267 264 285 265 262.1 16.3737594949969 d=x−yd=x−y 21 -7 9 0 25 -17 -3 -1 -16 5 1.6 13.9459273226591 (a) Find the test statistic. (b) Test the claim at the 0.05 significance level. Positive critical value: Negative critical value: Is there sufficient data to support the claim?YesNo
The following table gives the cost of household’s electricity bills during the spring months, in dollars. The households are in the same area and are similar in size. The first column represents houses with central air, and the second column represents houses with window units. (Round answers to one decimal place) Central Air Window Unit 32 16 65 87 85 98 100 120 67 42 40 20 70 80 80 90 98 110 70 40 a) The mean for the Central air column is Answer. b) The mean for the Window Unit column is Answer. c) The standard deviation for the Central Air column is Answer. d) The standard deviation for the Window Unit column is Answer.
2. This is a sample of 10 random seasons in the National Hockey League, Wayne Gretzky scored 50% more points than anyone who ever played professional hockey. He accomplished this amazing feat while playing in 280 fewer games than Gordie Howe, the previous record holder. Here are the number of games Gretzky played during each season. 45 70 73 73 74 78 79 80 80 82 e. What is the shape of the data?f. What is the best measure of center and spread to use for this data set
Find the median from the following data: Class Interval Frequency 5- 10 15 10 - 15 20 15 -20 22 20-25 36 25 - 20 7 O a. 19.40 O b. 18.90 O. 20.40 O d. 18.40
Short Answer 2: The times students in a stats class were able to hold their breath in seconds is as follows: 35 31 103 32 52 76 42 37 48 54 50 55 40 111 49 80 66 30 62 23 37 37 79 48 53 32 95 100 27 75 41 72 18 40 93 64 57 36 44 Answer the following questions in the box below. (You may copy and paste the headings to make it easier). Make sure to round correctly! Mean: Median: Mode: Standard Deviation: IQR: Range: Five Number Summary: Are there any outliers?: (If so, what are they?): Shape of the data: Best Measure for Center: Best Measure for Spread:
Refer to the data below. 38 42 26 22 30 42 36 42 1)The mean is 2)The range is: 3)The difference between the mode and median is: 4)Which measure of dispersion in a data set is calculated using all the values in the set?
A survey was given to 18 employees. One question asked about the one-way distance the employee had to travel for work. The results, in kilometers, are shown below. Kilometers Traveled for Work 12 10 18 3 4 28 5 32 26 10 41 85 1 7 8 5 10 15 Find the first quartile of the data.
pauieidxa aJe Pien aun 2. Consider the following data on the hours of burnout for a sample of 59 lightbulbs 68 70 86 88 62 61 79 92 116 103 68 63 88 81 62 74 62 94 71 70 58 98 98 65 73 71 70 97 94 59 57 90 71 101 78 43 59 67 61 71 96 75 64 76 72 77 74 65 82 86 66 86 96 107 57 97 86 59 83 Describe the shape of the data using coefficient measures based on the moments 3. Ten competitors in a beauty contest are ranked by three judges as follows: Competitors Judges 6. 7 8 9. 10 1|Page
A boat capsized and sank in a lake. Based on an assumption of a mean weight of 142 lb, the boat was rated to carry 60 passengers (so the load limit was 8,520 lb). After the boat sank, the assumed mean weight for similar boats was changed from 142 lb to 171 lb. Complete parts a and b below. a. Assume that a similar boat is loaded with 60 passengers, and assume that the weights of people are normally distributed with a mean of 178.5 lb and a standard deviation of 36.9 lb. Find the probability that the boat is overloaded because the 60 passengers have a mean weight greater than 142 lb. The probability is 1.000. (Round to four decimal places as needed.) C.. b. The boat was later rated to carry only 13 passengers, and the load limit was changed to 2,223 lb. Find the probability that the boat is overloaded because the mean weight of the passengers is greater than 171 (so that their total weight is greater than the maximum capacity of 2,223 lb). The probability is. (Round to four decimal…
When a student performs poorly on a midterm exam, the student sometimes is convinced that their score is an anomaly and that they will do much better on the final exam. The data below show the midterm and final scores (out of 100 points) for eight students in an introductory statistics class. Student Midterm Final 1 70 88 2 58 52 3 85 84 4 82 74 5 70 80 40 36 7 85 48 8 85 96 a) Construct a scatterplot for the data. Describe the pattern that you see in the scatterplot. Are there any clusters or outliers? If so, how would you explain them? b) Calculate the regression line for predicting a student's score on the final exam based on the student's score on the midterm.
For problems 4-7, Let A = {1, 3, 5, 7, 9}, B = {4, 5, 6, 7}, C = {6, 7}, and the universal set is S, where S = {1, 2, 3, 4, 5, 6, 7, 8, 9}. List the elements in each of the sets in problems 4 and 5. 3. AUB 4. AU(BnC) 5. Find n(B') 6. Find n(AnC)
What is the appropriate measure of center for these data? O A. Mode OB. Range OC. Mean O D. Median O E. Skew 1525 54 1 5 2 6 5 4 3 19 8 7 6 4 4345656 7 6 9

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