You survey 5 of your friends regarding their score on a test. The results are as follows: 80 50 95 90 70 The sample mean is The sample variance is The sample standard deviation is Give the sample standard deviation as a decimal to two decimal places.

Q: Q4\ The random sample of scores on a history test that eight students got on a history test were: 69…

A:

Q: In the diagram, about 68% of the scores fall within the shaded area, which is symmetric about the…

A: For 68%; Range can be given as Mean +/- SD

Q: For the sample: 45 84 73 58 54 73 52 60 51 80. Determine the standard deviation and round answer to…

A: The formula of the standard deviation is,

Q: Solve for the range, variance, and standard deviation of this data: 40, 34, 50, 46, 47, 39. +Input…

A: We will find out all the required values.

Q: A simple random sample of 40 items resulted in a sample mean of 25. The population standard…

A: Solution:- Given that  n=40                    sample mean X=25…

Q: Refer to the accompanying table, which describes the number of adults in groups of five who reported…

A: Given that ; X represents the number of adults in groups of five who reported sleepwalking P(x) is…

Q: In the diagram, about 68% of the scores fall within the shaded area, which is symmetric about the…

A: For a bell shaped distribution (normal) the empirical rule states that, Approximately 68% of the…

Q: The blood pressure of a random sample of six patients are as follow: 122, 128, 134, 116, 124, 130 If…

A: Calculate Mean from the following data122,128,134,116,124,130

Q: n = 11 Ex=55 Ex²=2230 Give the value of the sample standard deviation.

A:

Q: The mean and standard deviation of a population are 200 and 20, respectively. Suppose samples of…

A: We have given that, Population mean (μ) = 200, standard deviation (σ) = 20 and sample size (n) = 36…

Q: In an examination, the mean grade is 81 and the standard deviation is 6. Find the Z-score of the…

A:

Q: A sample consists of the following n = 5 scores: 10 4 3 7 3 Compute the mean and standard deviation…

A:

Q: Using your calculator, find the range and standard deviation, round to two decimals places: The…

A: Given: Data 85 70 25 68 53 74 31 52 58 52 44 33 86 38 47 44 43…

Q: The imagine attached has a problem I would like you to assist me with. Could you explain EXACTLY…

A: Range: The range is the difference between the largest and smallest observations in a set of data.…

Q: Using your calculator, find the range and standard deviation, round to two decimals places: The…

A: We have given that,  The data set is,  60 67 82 49 51 78 48 49 71 48 59 23 42 68 26 55 57 55 23 26…

Q: Seth asked a random sample of 20 students how much cash they had in their pocket. The following…

A: Standard Deviation: It is a statistical measure that measures the dispersion of the dataset from the…

Q: The table on the right gives the annual income for eight families, in thousands of dollars. Find the…

A: Given that following data Family Income x A 49 B 51 C 46 D 48 E 47 F 48 G 45 H 50…

Q: In a dependent sample t-test, you calculate the standard deviation for the  a) difference scores b)…

A: In this we have to tell that, for what values we calculate the standard deviation while using the…

Q: You have measured the length of a table to be 205.0 cm, 205.8 cm, 205.4 cm, 204.6 cm, and 204.9 cm…

A: a) Mean length of the table and the standard deviation of the mean length of the table. Given,…

Q: What is the average score for those who say they are an employee who others can depend on with the…

A: Average score: The general formula to obtain the expected value (mean) of a discrete random variable…

Q: Using your calculator, find the range and standard deviation, round to two decimals places: The…

A: Given data: 64 59 67 40 53 55 48 65 73 47 67 48 78 49 84 74 37 73 80 88 47 40 92 10

Q: What is the correct test statistic table to use when you are comparing the mean weight of a sample…

A: For comparing the mean weight of a sample chairs when the population standard deviation is unknown,…

Q: Refer to the accompanying table, which describes the number of adults in groups of five who reported…

A: There are 6 observations in the given table. The table represents probability distribution. We have…

Q: One aspect of the beauty of scenic landscape is its variability. The elevations (feet above sea…

A: We have given that,  The data set is,  901, 658, 577, 1360, 901, 1198, 820, 1090, 631, 658, 1306,…

Q: Refer to the accompanying table, which describes the number of adults in groups of five who reported…

A:

Q: Refer to the accompanying table, which describes the number of adults in groups of five who reported…

A: Given,

Q: 4. Which of the following lists has the greatest standard deviation? a. 96 99 b. 2 100 101 103 4 6.…

A: For list a) x (x-x) (x-x)2 96 -3.8 14.44 99 -0.8 0.64 100 0.2 0.04 101 1.2 1.44 103 3.2…

Q: In a particular examination, the mean score is 82 and the standard deviation is 3.7. What is the Z-…

A:

Q: 46. Two hundred eighty (280) incoming freshmen at a certain college were given IQ tests. Assuming…

A: Let X denote the IQs  and it follows normal distribution with a mean of μ=100 and a standard…

Q: The proportion of adult women in a certain geographical region is approximately 51%. A marketing…

A: Find the proportion of sample of 200 that are expected to be women:Here, it is given that,…

Q: A population has a Mean of 100 and a standard deviation of 15.  A sample of 20 college students is…

A: Given information- Population mean, µ = 100 Sample mean, x-bar = 125 Population standard deviation,…

Q: Q2 (c): According to the above frequency distribution table, the :value of mean deviation (MD) is

A: here given grouped frequency distribution

Q: 1) Here are the weights in pounds of a sample of 10 students in fourth grade class: 61, 64, 66, 74,…

A: A) Mean: Mean(x¯)=Sum of data valuesNumber of data values        =61+64+66+74+77+78+78+83+84+8510…

Q: The marks of six students in a science test are represented by the variable x. The following data…

A:

Q: You are given that mean = 50, coefficient of variation = 40% and coefficient of skewness =-0.4. You…

A: Given,mean=50coefficient variation(CV)=40%coefficient of skewness=-0.4

Q: What is the standard deviation for these students' quiz scores

A: Let X denote the score on the quiz. We have to calculate the SD of X.

Q: The average number of days spent on the road for business by business travellers is 115 per year.…

A:

Q: A population has a mean of 50, and the standard deviation is 10. You take several samples and…

A: We know formula for computing sample size is,  n≥Zα 2 σE2 where,  n- sample size  σ - population…

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

A:

Q: the standard deviation of a sample of 50 observations equals 10. the variance of the sample equals?…

A:

Q: In a certain population, let us assume that high school scores are normally distributed with mean of…

A: Obtain the 75th percentile.   The value of 75th percentile is obtained below as follows:

Q: Assuming that a population is normally distributed, then about 75% of sample means drawn from this…

A: Let about 75% of the sample means drawn from the normal population will lie within k standard…

Q: Given the following scores of students in a test: 5,7,11,12,13,18 a) add 8 to each score then find…

A: Given that  The data are 5,7,11,12,13,18

Q: Q7 / For the data in the frequency table below, find the value of the standard deviation Class…

A: The following is the formulae for the Standard deviation of Frequency distribution…

Q: The variance of a sample of 81 observations equals 64. The standard deviation of the sample equals?…

A:

Q: A quiz consists of 50 multiple choice questions, each with five possible answers, only one of which…

A: Given ,n = 50 P = 15 = 0.2

Q: Find the​ mean, variance, and standard deviation of the binomial distribution with the given values…

A:

Q: In a certain population, let us assume that high school scores are normally distributed with mean of…

A: It's normal distribution with mean=74 And standard deviation=15

Q: find the mean and standard deviation for A B C Sample a: 12. 21.30 Sample b: 70, 79,88 Sample…

A: Given information- We have given 3 samples. Sample a, sample b, sample c. We have to find the mean…

Q: Seth asked a random sample of 20 students how much cash they had in their pocket. The following…

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.