In a certain population, the mean price of the stock prices was 230, the median was 262, the variance was 1220, the first quartile was 245. and the third quartile was 270. Find the second quartile?

Q: The mean of 5 observations is 4.4 and the variance is 8.24. If three of the five observations are…

A: Given: Number of observations (n) = 5 Mean x¯=4.4 Variance (s2) = 8.24 The three observations are 1,…

Q: How would you explain the analysis of variance, assuming that your audience has not had a statistics…

A:

Q: According to a gallup survey of boys 77% of boys had played computer games in the past week compared…

A: Let p1 be the percentage of boys had played computer games  p2 be the percentage of girls had played…

Q: tudies if age correlates with the average number of hours of sleep, so she selected a random sample…

A: Given: sample size(n)=10   Age(x) Hours of sleep(y) xy x^2 y^2   8 8 64 64 64   15 8 120 225…

Q: what is the appropriate statistical analysis to determine whether males and females differ?

A:

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

A:

Q: A student scored 70 on a physics exam where the class mean is 80 and a SD of 9. He scored 60 on a…

A:

Q: When data is normally distributed the mean equals the median True False

A: Normal distribution

Q: In the 5 models above, which variable, by itself, explains the greatest proportion of total variance…

A: Predictor P for variable X3 is larger among all other variables. Hence variable X3 explains that…

Q: When solving a problem related to one sample and the confidence interval of variance. Which table…

A:

Q: The mean is cosidered to be the "balance point" for a distribution becuase exactly half of the…

A: The mean is considered to be the "balance point" for a distribution because exactly half of the…

Q: In a frequency distribution, the coefficient of skewness based on quartiles is 0.5. If the sum of…

A:

Q: How the squared curvilinear correlation, η2, reflects the proportion of variance?

A: In analysis of variance, either for regression model or for design, if the proportion of variance is…

Q: For his statistics assignment, Johnson examined differences in quality of grades obtained by…

A: Johnson examined differences in quality of grades obtained by students on the regular program of a…

Q: The third quartile of the data: 22,17,10,35,40,18,9 is equal to

A: These are the sample data that have been provided: Observation: XX 1 22 2 17 3 10 4 35…

Q: If a person is making the third quartile salary for a CPA they are making less than what perc

A: Given: As,

Q: Dr. Altman is testing the effect of her new exercise program for older adults living in assisted…

A: Solution: Dr. Altman wants to know if  her new exercise program has a significant effect on walking…

Q: the variance of a data set is 144 and mean is 72 then coefficient of variance is

A: Given,variance(σ2)=144mean(x¯)=72

Q: A researcher calculates the variance of her sample to be s = -6. , what would you tell the…

A: Here's the explanation for this as follows; The sample variance, s², is used to calculate how varied…

Q: A local real estate magazine used the median instead of the mean when it reported the SAT score of…

A: It is given that the data were strongly skewed to the right.

Q: The mean of a data set is 12.5 cm, and the variance is 4.0 cm. What is the z-score of 9.5?

A: Mean = 12.5 Variance = 4.0  Raw score = 9.5

Q: The mean of a distribution is 291, while the median is 217. Which of these statements is likely to…

A:

Q: Joe wanted to conduct an experiment where participants were randomly assigned to receive either no…

A: GivenDependent variable = heart rate in beats per minutethe independent variables is amount of…

Q: The mean of the distribution of grades for Exam 1 was 58 , while the median was 70. The distribution…

A: Given:  Mean of distribution =58 and  Median=70 then distribution is ? A. Left skewed   B. Right…

Q: What is the value of the sample correlation r?

A: It is given that Regression line : y = -3.05 + 0.10x Number of observations n = 13 Number of…

Q: The sample mean or sample proportion is unbiased estimator to the population proportion in case of…

A: The sample mean or sample proportion is unbiased estimator to the population proportion in case of…

Q: What is the shape of the distribution of a sample of scores that has a mean of 12, a median of 14,…

A: First of all, you can see that the for a distribution, mean, median and mode are all different.  It…

Q: The accounting department analyzes the variance of the weekly unit costs reported by two production…

A: See the handwritten solution

Q: what is the  z score of 128,101,116,119,131 when the mean is 119 and variance is 36

A: It is given that  Mean, μ = 119 Variance, σ2 = 36 Standard deviation, σ = 6 Z-Score, Z = ( X - μ )/σ

Q: A researcher measures the amount of food consumed by each dog in her lab. She finds that the mean…

A: In statistics, variance is the average squared distance of each data points from the population…

Q: Dr. Altman is testing the effect of her new exercise program for older adults living in assisted…

A: given,  population mean = 4mph population variance =σ2=  ? sample mean- 3.42 n=7 calculation of the…

Q: A distribution has a mean of 75 and a median of 70. This distribution is probably positively skewed

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Q: If you have a Pearson correlation coefficient of .30, what is the proportion of variance accounted…

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Q: What is the 75th Percentile of a data set when the Inter Quartile Range (IQR) is 12.5 and the first…

A:

Q: Let's use the data from the previous question. Make sure to document, the mean, Variance and SD.

A: Solution-: We find mean, variance and standard deviation of given score of students.

Q: The average number of newspapers for sale in an airport newsstand is 12, and the variance is 25. The…

A: We have given that  Average and variance for newspapers.  Average = 12 Variance = 25 Standard…

Q: What is the value of the correlation coefficient r across the entire data set (all 10 students)?

A: INTRODUCTION :   CORRELATION:  In a bivariate distribution, we may be interested to find out if…

Q: re interested in examining the variability in current marital status by race. Which measure of…

A: Nominal variables are used with categorical data because they do not have quantitative values. In…

Q: What is the symbol for the sample linear coefficient correlation?

A: Linear correlation coefficient is denoted by r.

Q: Suppose we measure GPA for people in our class, we find the mean is 2.8 and the median is 3.2. What…

A: Given: Mean = 2.8 Median = 3.2

Q: Suppose that the mean score of a class of 34 students was 79. The 15 male students in the class had…

A: Given that the mean score of a class of 34 students was 79. The 15 male students in the class had a…

Q: If the correlation is .8, then 40% of the variance is explained?

A: The given statement is incorrect.

Q: find an example of when statistics were misused/skewed and state the reason why you think the…

A: when statistics were misused/skewed: Misuse can also result from mistakes of analysis that result in…

Q: The fuel efficiency, in miles per gallon, of 10 small utility trucks was measured. The results are…

A: Given the values 22, 25, 23, 27, 15, 24, 24, 32, 23, 22, 25, 22. We need to find the variance of…

Q: Suppose that the mean score of a class of 34 students was 78. The 17 male students in the class had…

A: The mean score of class of 34 students was 78.

Q: Suppose that the variance of the sample mean is equals 25 and the sample size is 6 . then the…

A:

Q: The mean of the distribution of sample means would be equal to:

A: The mean of the distribution of sample means would be equal to ?

Q: Compose the score values for 3 samples that have the same mean and median, but differ in the amount…

A: Part 1   2, 4, 6 3, 4, 5 4, 4, 4     Explanation: Part 1   There are many different conceivable…