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11. The table below represents the frequency distribution of total extra mathematic exercises during a 14-week...
The following table gives the frequency distribution of the number of hours spent last week on...
The following table gives the frequency distribution of the number of hours spent last week on cell phones (making phone calls and texting) by all 100 students of the tenth grade at a school. Hours per Week Number of Students 0 to less than 4 13 4 to less than 8 16 8 to less than 12 21 12 to less than 16 16 16 to less than 20 17 20 to less than 24 17 Find the mean, variance,...
The following frequency distribution represents the number of hours studied per week by a sample of...
The following frequency distribution represents the number of hours studied per week by a sample of 50 students. Picture Refer to Exhibit 3-8. The standard deviation of the number of hours studied is: 1.89. 2.79. 3.50. 3.56. hours studied midpoint frequency 2.5 less than 5.5 4 5 5.5 less than 8.5 7 30 8.5 less than 11.5 10 25
Suppose that the distribution for total amounts spent by students vacationing for a week in Florida...
Suppose that the distribution for total amounts spent by students vacationing for a week in Florida is normally distributed with a mean of 650 and a standard deviation of 120. Suppose you take a SRS of 30 students from this distribution. What is the probability that an SRS of 30 students will spend an average of between 600and700? Round to five decimal places.
The times that college students spend studying per week have a distribution skewed to the right...
The times that college students spend studying per week have a distribution skewed to the right with a mean of 8.6 hours and a standard deviation of 2.8 hours. Find the probability that the mean time spent studying per week for a random sample of 16 college students would be more than 9.1 hours. Round your answer to two decimal places. Attach File Browse My Computer Browse Content Collection Browse Dropbox QUESTION 7 The GPAs of all students enrolled at...
A random sample of 60 students in the business statistics course answered a survey on the...
A random sample of 60 students in the business statistics course answered a survey on the average number of hours they spent on statistics each week. Unfortunately, the original data were lost and all that remains is the frequency table below. From these data, calculate the estimated sample mean, variance, Standard Deviation and the coefficient of variation. hours frequency 0-3 18 4-7 16 8-11 14 12-15 10 16-19 2 show all working and formulas
Find the standard deviation, s, of sample data summarized in the frequency distribution table given below...
Find the standard deviation, s, of sample data summarized in the frequency distribution table given below by using the formula below, where x represents the class midpoint, f represents the class frequency, and n represents the lotal number of sample values. Aiso, compare the computed standard deviation to the standard deviation obtained from the original list of data values, 9.0. [Σ.)-Συ.) nin-1) 60-59 25 60 49 70-79 Interval 20-29 30-30 4040 10 Frequency 20 36 (Round to one decimal place...
In Exercises 29–32, find the mean of the data summarized in the frequency distribution. Also, compare...
In Exercises 29–32, find the mean of the data summarized in the frequency distribution. Also, compare the computed means to the actual means obtained by using the original list of data values, which are as follows: (Exercise 29) 36.2 years; (Exercise 30) 44.1 years; (Exercise 31) 224.3: (Exercise 32) 255.1. 30. 29. Frequency Age (yr) of Best Actress When Oscar Was Won 20-29 28 30-39 Frequency 29 34 14 3 5 Age (yr) of Best Actor When Oscar Was Won...
2. Below is a frequency distribution of earnings of 50 contractors in a country. Regarding this...
2. Below is a frequency distribution of earnings of 50 contractors in a country. Regarding this distribution. Frequency Class Interval 0-10 10-20 20-30 30-40 40-50 50-60 Compute the mean, variance, the standard deviation and the Coefficient of variation (CV) of the earnings of these contractors. Compute the skewness of the distribution of earnings of these 50 contractors. Is the distribution positively or negatively skewed? (iii)
7. The following frequency distribution table represents a survey of 100 resort dlub managers on their...
7. The following frequency distribution table represents a survey of 100 resort dlub managers on their annual salaries. Find the midpoint, relative frequency, cumulative frequency, mean, standard deviation and variance for the frequency distribution table, then graph the histogram of the data. ay Managers) ($1000s) 15-25 26-36 15 4353172a 111757 S 48-58 uj 59-69 751750 slo abolo ak loo 10% 94 gb 5% 30119 3630 5Wg/616%|loo 70-80 81-91 6 total 1100 Su5som bone tion w many 3-Persm Committeescan be Seluctedd...
Find the standard deviation, s, of sample data summarized in the frequency distribution table below by...
Find the standard deviation, s, of sample data summarized in the frequency distribution table below by using the formula below, where x represents the class midpoint, f represents the class frequency, and n represents the total number of sample values. Also, compare the computed standard deviation to the standard deviation obtained from the original list of data values, 11.1. sequalsStartRoot StartFraction n left bracket Summation from nothing to nothing left parenthesis f times x squared right parenthesis right bracket minus...
The times that college students spend studying per week have a distribution skewed to the right with a mean of 8.6 hours and a standard deviation of 2.8 hours. Find the probability that the mean time spent studying per week for a random sample of 16 college students would be more than 9.1 hours. Round your answer to two decimal places. Attach File Browse My Computer Browse Content Collection Browse Dropbox QUESTION 7 The GPAs of all students enrolled at...
Find the standard deviation, s, of sample data summarized in the frequency distribution table given below by using the formula below, where x represents the class midpoint, f represents the class frequency, and n represents the lotal number of sample values. Aiso, compare the computed standard deviation to the standard deviation obtained from the original list of data values, 9.0. [Σ.)-Συ.) nin-1) 60-59 25 60 49 70-79 Interval 20-29 30-30 4040 10 Frequency 20 36 (Round to one decimal place...
In Exercises 29–32, find the mean of the data summarized in the frequency distribution. Also, compare the computed means to the actual means obtained by using the original list of data values, which are as follows: (Exercise 29) 36.2 years; (Exercise 30) 44.1 years; (Exercise 31) 224.3: (Exercise 32) 255.1. 30. 29. Frequency Age (yr) of Best Actress When Oscar Was Won 20-29 28 30-39 Frequency 29 34 14 3 5 Age (yr) of Best Actor When Oscar Was Won...
2. Below is a frequency distribution of earnings of 50 contractors in a country. Regarding this distribution. Frequency Class Interval 0-10 10-20 20-30 30-40 40-50 50-60 Compute the mean, variance, the standard deviation and the Coefficient of variation (CV) of the earnings of these contractors. Compute the skewness of the distribution of earnings of these 50 contractors. Is the distribution positively or negatively skewed? (iii)
7. The following frequency distribution table represents a survey of 100 resort dlub managers on their annual salaries. Find the midpoint, relative frequency, cumulative frequency, mean, standard deviation and variance for the frequency distribution table, then graph the histogram of the data. ay Managers) ($1000s) 15-25 26-36 15 4353172a 111757 S 48-58 uj 59-69 751750 slo abolo ak loo 10% 94 gb 5% 30119 3630 5Wg/616%|loo 70-80 81-91 6 total 1100 Su5som bone tion w many 3-Persm Committeescan be Seluctedd...
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