What is the value of z score ? Mean  =142 Standard devaition=2 X =140

Q: What is the probability that a first grade classroom of 20 students who are chosen randomly from the…

A: Given Information: Mean μ=100 Standard deviation σ=15 Sample size n=20

Q: What are the mean, standard deviation, relative standard deviation, median,and range for the numbers…

A: The mean is the average value of the data and it tells about the middle part of the data or…

Q: Supposed the Mean percentage in algebra shoe is 70% and the standard deviation is 8% what percentage…

A:

Q: Differentiate Mean from Variance. What is their similarities and differences? (Essay form)

A: Here we need to differentiate mean from variance.

Q: t does a z-score of -3.8 mean

A: A z-score is known as the standard score that determines how much the data point deviates from the…

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: What is the percentage of scores that lie between a z score of -2 and a z score of 1?

A:

Q: Extreme/usual scores that can impact results are called:

A: Solution: Outliers: Outliers can be defined as outliers are the extreme observation that are…

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: How do I interpret the 6 charcteristics of data when I am only given the mean, median, mode, and…

A: According to the provided information, mean, median, mode, and standard deviation are given.

Q: how to plot a graph for mean values vs probability of cell culture? how to plot a graph for density…

A: Graph for mean values vs probability of cell culture: Let us consider the example of the mean values…

Q: What is the decision rule for the t-test that the mean child mortality rate for countries in Eastern…

A: It is tested that the mean child mortality rate for countries in Eastern Europe is more than the…

Q: 84 Students Who Took The Achievement Test Last Oct. 2020 If the mean is 88, S = 2.50 How Many…

A: Answer - Given, Sample size n = 84 and the mean is μ = 88, S = 2.50                 How Many…

Q: South Salinas Price Sq Feet Beds 3 2 549 415 565 1175 600 506 489 590 419 500 969 750 399 650 439…

A: Given: n1 = 25 n2 = 25 Formula Used: Test-statistic t = X1-X2sp1n1+1n2 sp =…

Q: How do you compute the range, interquartile range and standard deviation

A: formula's of Range , Interquartile range and standard deviation.

Q: What are the three value to indicate variability of a data set How do you determine whether it is…

A: Variability :  It refers to the difference being shown by the data points within a data set, as…

Q: The sample data below represent the ages of 10 tandomly selected people. Find the following…

A: Step-by-step procedure to obtain descriptive statistics using Excel is given below: In Excel sheet,…

Q: What is the area of proportion below a z-score of -.91? What is the area of proportion between the…

A: Z scores are given.

Q: An analysis was conducted to determine whether the average height of the 25 girls in the same class…

A: Here Avg height of 25 girls in the Same class is difference from population mean is checked Here…

Q: step 4 can you calculate the p value without using excel?  need to be able to do on a test without…

A: From given data  n=19 so, degree of freedom is df=n-1=19-1=18

Q: What (negative) z-score has 47% of scores between it and the mean?

A: The negative z-score means the data value is below the mean or average value. The standard normal…

Q: What is the area of proportion between the mean and a z-score of -2.88? What is the area of…

A: The area of proportion between the mean and a z-score of –2.88 = P(–2.88 < Z <0) = P(Z<0) –…

Q: Test Statistic p-value= =

A: The sample size for first population is 34, sample mean is 4.9 and sample standard deviation is 1.7.…

Q: 8. What symbol is used to identify the standard error of the mean?

A: To find The symbol used to identify the standard error of the mean.

Q: How do I explain applying the normal curve to a set of test scores?

A:

Q: What proportion of scores lie between 128 and 133 on a test with a mean of 125 and standard…

A:

Q: What is the value of z score ? Mean  =142 Standard devaition=2 X =146

A:

Q: What are the similarities and differences of statistical inference of single mean as compared to a…

A: Generally, in the testing of a single population mean the distribution of a particular test for the…

Q: what is the standard error (usually standard error of the mean)?

A: Standard error: The standard error of the statistic is defined as the standard deviation of its…

Q: 9. Explain the similarities and differences between standard deviation and IQR. When might one be…

A:

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.