The following are some of the particulars of the distribution of weight of boys and girls in a class : Boys Girls Number 100 50 Mean weight 60 45 Variance 4 (a) Find the standard deviation of the combined data (b) Which of the two distributions is more variable ?

Q: In a series of 5 observations, the values of mean and variance are 4.4 and 8.24. If three…

A: It is given that the mean and standard deviation are 4.4 and 8.24.

Q: Show hypothetical or imagined data on the scores of 10 students in a 50 – item test where the…

A: Given that a data on the scores of 10 students in a 50 – item test where the highest score is 48 and…

Q: Calculate the variance and standard deviation from the following data 16, 20, 20, 25, 18, 26. 30,…

A: Given: Data, X 16 20 20 25 18 26 30 29 30 26 3

Q: Data was collected on a disease that mostly affects the elderly. The majority of the patients are…

A: In this case, the Median is the most appropriate measure the center of the distribution of the ages…

Q: In a series of 5 observations, the values of mean and variance are 4.4 and 8.24. If three…

A:

Q: Find  Variance and Standard deviation for the following data.  4,  4,  7,  11,  14.

A: Given sample xi is:  4, 4, 7, 11, 14  Sample size, n = 5   Sample mean can be calculated as:…

Q: Given the following data for a group of 17 pupils. A. Heights in inches 60, 63, 61, 58, 57, 61, 59,…

A:

Q: A statistics test has a mean of 60 and a standard deviation of 10 while an accounting test has a…

A: Given information Statistics test Mean µ = 60 Standard deviation σ = 10

Q: Q4/ Calculate the Quartile Deviation (Q.D) and coefficient of Q.D. for the data: Class 10-20 20-30…

A: The provided data is: Class interval Frequency Cumulative frequency(cf) 10-20 5 5 20-30 8…

Q: Data for two variables (for height in cm and weight in kg) are taken from 100 female and 100 male…

A: The variability is directly proportional to standard deviation. So, lower the standard deviation,…

Q: If the variance for the weight of a sample of six boxes is 28.2 kilograms squared, what is the…

A:

Q: Tim is a researcher who is dealing with a SAMPLE of scores.  The SAMPLE of scores is: 14, 16, 18,…

A: Given observation SAMPLE of scores is: 14, 16, 18, 13, 13, 19, 21, 11 n = 8

Q: her wishes to give A’s to the top 8% of the students and F’s to the bottom 8%. The next 10% will be…

A: given: mean(μ)=78 sd(σ)=8

Q: Which of the following levels of variability (standard deviation or variance) would most likely…

A: The platykurtic curve has shorter peak and thinner tail compared to normal distribution. The excess…

Q: I am trying to determine the variance, standard deviation and the CV for a set of data. The data…

A: Descriptive statistics are referred to as the summary statistics.

Q: i. mean, mode and median for the data. ii. range and inter-quartile range. iii. standard deviation…

A:

Q: Give the mean and the standard deviation of the distribution of means for mean=100; Variance=100;…

A:

Q: Tim is a researcher who is dealing with a SAMPLE of scores.  The SAMPLE of scores is: 15, 17, 19,…

A: Given data is 15, 17, 19, 22, 10, 23, 16, 15S.S=122.88

Q: The following are sum of the particulars distribution of weights, of boys and girls in a class. Boys…

A:

Q: A sample of 30 distance scores measured in yards has a mean of 7, a variance of 16, and a standard…

A: Given statistics:Consider the variable x represents the distance scores in yards.The given…

Q: The table below shows the grades of the 20 students of a martial arts class. There are three grades:…

A: It is required to identify the most suitable measure of variability appropriate for the given…

Q: How many of the sample of families would fall above 2 standard deviations from the mean? A. 0 B. 1…

A:

Q: For her test grades, Gena has a mean = 65 and standard deviation = 25. Patti has a mean = 65 and…

A: Gena has a mean = 65 and standard deviation = 25. Patti has a mean = 65 and standard deviation = 5…

Q: What percentage the male population is between 72 and 76 inches in height?

A: The height of men in country is normally distributed with mean of 6 feet and variance of 16 inches…

Q: If the deviations six of values from their mean are 0 , -6, 7 , -2 , 5 , -4 then the variance equal…

A: Variance: Variance is used to explain how the data points (or values) are deviated from the mean and…

Q: INTERPRET THE result of the data:   The scores of 6 job applicants. P.S. treat this data as if it…

A: Descriptive of the data set or the summary of the data observation can be explained using the two…

Q: calculate the following X= (455.2, 676.7, 784.7, 349.1, 437.5, 678.3, 760.2, 788.4, 278.3 and 455.2}…

A: As per the question we are given the following data set : X = {455.2, 676.7, 784.7, 349.1, 437.5,…