Consider the following data reflecting lengths of stay in the hospital (recorded in days) and total charge (in R1000) for six patients undergoing a minor surgical procedure: Length of Stay 5 9 10 12 15 7 Total charge 6 5 7.2 8 9.4 7.9

Q: How do the results compare to the percentage using the empirical rule?

A: Empirical rule: The empirical rule states that it was for a normal distribution data. It falls…

Q: A sample of n = 6 scores has a mean of M = 10. If one score with a value of X = 12 is removed from…

A: Given that  A sample of n = 6 scores has a mean of M = 10

Q: A study found the lengths of daily driving time for people in your district are Normally distributed…

A: The mean is 35 minutes and the standard deviation is 3.

Q: You just finished statistics class and are eager to collect and analyze your own data! You run out…

A: Since, it is given that,student just finished statistics class to  collect data on the average score…

Q: Find the proportion of Normally distributed observations with a zz-score above 0.84. Give your…

A: Let Z be the random variable from normal distribution with z-score above 0.84 then we will find the…

Q: What is the z score of x=30 if x is three deviations to the left of the mean?

A: From the provided information, x = 30 and it is three deviations to the left of the mean.

Q: Where do p-values concentrate?

A: Under the null hypothesis H0 about the unknown distribution of the test statistic, the p value is…

Q: The average score for Indiana public school 6th graders on a standardized reading comprehension test…

A: The hypothesized mean is 75, the sample mean is 75.9 and the standard deviation is 5.

Q: True or False? H0 for the sign test always states that the mean difference between the matched or…

A: Solution: Sign test is a non-parametric test that is used to compare the two groups by using the…

Q: Explain the general rationale behind using a z-score for describing how an individual performed on…

A: The z-score, also known as the standard score, is a statistical measure that quantifies how many…

Q: Hello. I appreciate any help. Thanks.

A: Standard Error of estimate:S=√MSEMean square error:The formula for the mean square error is,MSE =…

Q: Unfortunately, arsenic occurs naturally in some ground watert. A mean arsenic level of u = 8.0 parts…

A:

Q: Define how to use t-Statistic in Regression When the Sample Size Is Small? Explain Use of the…

A: The t statistics is divided by its standard error coefficient. The default error is an approximation…

Q: The director of research and development testing and new drugs she wants to know if there's evidence…

A: Test statistic:Denote μ as the claimed mean; μ = 384. In a random sample of n = 79, the sample mean…

Q: What is percentage of variance explained (r2)? What info does it tell you about the independent…

A: What is percentage of variance explained (r2)=Square of correlation coefficient   What info does it…

Q: What is the mode of a distribution of scores for a variable measured by? What is the variance of a…

A: Let us take a small dataset with frequency distribution and understand all the terms with this…

Q: Describe about Sources of variability for ANOVA and the F ratio.

A:

Q: If the t-statistic for a variable is -1.74, is the variable statistically significant?   No   Yes

A: If the t-statistic for a variable is -1.74, is the variable statistically significant? Explanation:…

Q: The means and standard deviations are given in the data table. With a correlation of 0.826,…

A: Given: Correlation coefficient r = 0.826 Mean of Dose X = 1.651 The standard deviation of Dose SX =…

Q: isn't it should use the normal table to find z value?

A:

Q: A sample of n = 10 scores has a mean of M = 13. After one score is added to the sample, the mean is…

A: Solution-: Given: n=10,M=13 (old)We want to add one score in the sample, the mean is found to be M =…

Q: The average exam score is 63 with a variance of 33.  Your exam has a Z score of 0.96. What is your…

A:

Q: A researcher wants to evaluate the effectiveness of a patch he thinks will significantly decreases…

A:

Q: Please also explain why you determined whether or not the results are statistically significant.  A…

A: From the given information we find the solution.

Q: If a class has an average of 71  with a SD of 10, use a Normal Curve to estimate the percent of the…

A:

Q: The entering SAT scores and high school GPA’s of 100 first-year students and their grade point…

A: The entering SAT scores and high school GPA’s of 100 first-year students and their grade point…

Q: In 1988, on the math SAT, the males taking the exam averaged about 500, while the females averaged…

A: From the provided information,

Q: According to the regression equation, for a student who gets 85 on the midterm (one standard…

A: For midterm, it is given that Mean1 = 75, SD1 = 10 For final, it is given that Mean2 = 75, SD2 = 10…

Q: In a test of significance, you can conclude there is a statistically significant relationship when:

A: The provided information is as follows:The objective of the given question is to determine when…

Q: f the claim that the proportion of residents with at least 2 years of college education is more than…

A: Given: z=1.502 The given test is a right tailed test The standard normal table has the area to the…

Q: Provide an example scenario for which you would use ANOVA and explain what the calculated F value…

A: Suppose a sample of diabetes patients and non diabetes patients weight is taken . A One Way ANOVA…

Q: Why would you use mean absolute deviation as opposed to the mean average?

A: Mean = average of all data points .