1. You were told that the mean score on a statistic exam is 75 with the scores normally distributed. In addition, you know the probability of a score between 55 and 60 is 4.41% and that the probability of a score greater than 90 is 6.68%. a) What is the probability of a score between 90 and 95? b) What is the probability of a score greater than 95? c) What is the probability of a score lower than 55?

Q: Analysis of Variance is a statistical test used in studies with several populations or groups. What…

A: The study is about the Analysis of variance.

Q: Explain Student t distribution & F distribution?

A: Student t distribution: Shape of a student’s t distribution is bell shaped curve with mean zero and…

Q: Derive mean and variance of gamma distribution.

A:

Q: Define sampling variability?

A: In general, variability is also called as range.

Q: ?In a symmetrical distribution, what will be the relationship among the mean, median and mode Mean =…

A:

Q: Explain t Distribution? & it's Prerequisites?

A: From the given question, The student’s t-distribution can be defined as:

Q: The central limit theorem describes what characteristics of the distribution of sample means?

A: The central limit theorem states that for large sample sizes, the distribution of sample mean is…

Q: An analysis of variance is used to compare the differences in O variances O standard deviations O…

A: The study is about the analysis of variance.

Q: 1 example of mean and variance

A:

Q: a) What are some of the distinguishing properties of a normal Distribution? Discuss b) The sampling…

A: • The answers to the above questions are as follows :-

Q: a. For the​ bell-shaped graph of the normal distribution of weights of Hershey​ Kisses, what is the…

A: The weights of the chocolate in Hershey Kisses are normally distributed with a mean of 4.5338 g and…

Q: Differentiate the different distributions 1. Normal 2. t-distribution

A:

Q: Derive variance for gamma distribution?

A:

Q: If we talk about the center in terms of the mean, then spread is described using the [Select] D If…

A: If we talk about the center in terms of the mean, the spread is described using the standard…

Q: What does a distribution represent?   Question 1 options:   Frequency of parameter…

A: A statistical distribution is a function that indicates a variable's potential values, and how often…

Q: What type of data could possibly follow a Normal distribution? O Binary O Qualitative Discrete…

A: According to the given information,  Normal distribution is used.

Q: determine p value and its meaning please

A: Solution

Q: Find the test statistic for this hypothesis test. | (Round to two decimal places as needed.)

A:

Q: Assuming a normal curve, find the lowest Z score a person could have while being in the following…

A: Using Normal curve Z = x-μσ We have given : ( a ) 10% P ( Z < z ) = 0.10 Using Excel =…

Q: A parametrical statistical test is one that makes assumptions about the parameters that define the…

A: here use basic definition of parametric statistical test  parametric test evaluate hypothesis test…

Q: Identify two uses of Poisson distributions.

A: Poisson Distribution is used for independent events which occur at a constant rate within a given…

Q: Ques45)The first and third quartile of a normal distribution respectively. Then distribution is the…

A:

Q: The mean is not one of the most commonly used measures of central tendency. Select one: False True

A: The mean is not one of the most commonly used measures of central tendency. Select one: False True

Q: Nonparametric test is a design to counter the non-normal distribution type of data. O True

A: Nonparametric test: The nonparametric tests are used if the population distribution is not known.…

Q: Which of these statistics are measures for the spread of a sample? A: (i), (ii), and (v) B: (i) and…

A: So Here given summary stastics

Q: Analysis of Variance  Use the graph attached below. In this assignment we are interpreting…

A: At 5% level of significance, if the the p-value of the test is less than 0.05 then we reject the…

Q: How to describe normal distribution and skewed in the histogram and density plots in general. Also,…

A: While seeing histogram if the histogram is somewhat symmetrical about the mean then it means that we…

Q: findpopulation variance   78,45,49,65,9,2,5,45,65

A:

Q: What do you mean by a normal curve (normal distribution) ?

A: Given : Normal curve (Normal distribution)

Q: When determining sample size what do you do if the sample proportion is unknown? What are the…

A:

Q: analysis of variance, differences caused by treatment effects contribute to which of the n an…

A: Given that, In an analysis of variance, differences caused by treatment effects.

Q: Looking for an appropriate statistical test to determine whether the data is normally distributed

A: With reference to histogram in the follow up solution, it is clear that the shape is approximately…