variable has the density curve whose equation is ? = 2x for 0 < ? < 1, and ? = 0 otherwise. d)  What percentage of all possible observations of the variable are at most 3/8? e)  What percentage of all possible observations of the variable are at least 1/4? f)  What percentage of all possible observations of the variable lie between 1/2 and 3/4?

Q: With Ha : µ > 139 you obtain a test statistic of z = 1.494. Find the p- value accurate to 4 decimal…

A: Given, Test statistics z=1.494

Q: 1) 1-sample t-test is used to compare a sample to a theoretical average Calculate t-score:…

A: Given: μ = 7 n = 7 Formula Used: Test-statistic t = X-μsn

Q: Q. 64 Give the formula for finding the deciles of a continuous distribution.

A: Solution-: We want find what is formula for finding the deciles of a continuous distribution.

Q: Which of the following statements are true? Choose all answers that apply: A The mean of the density…

A: As the density curve is a left skewed curve. The mean of the density curve is less than the median.

Q: All or nearly all of the observations fall within the interval

A: It is given that  Mean = 79.6 and SD = 13.9

Q: Assume that the variable under consideration has a density curve. It is given that 29.5% of all…

A: We have to find given probability.

Q: None

A: n = 51 cases with centre spread summary , W¯ = 60 Sw = 26 ,Now , Choose correct options from the…

Q: Suppose that in a certain population, individuals’ heights are approximately nor- mally distributed…

A:

Q: P(1.15 < Z < 2.77) =

A: X~N( 0 , 1 )   μ=0 , ?=1 (for standard normal distribution)   Z-score =( x - μ )/?

Q: 1. (based on #18, p. 293) The U.S. Army commissioned a study to asses how deeply a bullet penetrates…

A: Given the data as 22.4 29.1 31.7 33.5 35.4 37.4 23.6 29.6 31.9 33.5 35.4 37.5 24 29.7 31.9…

Q: Construct a frequency distribution and a relative frequency histogram for the accompanying data set…

A: Here, the number of class intervals, k=5 and maximum value=459 and minimum value=138.…

Q: Number of alcoholic drinks per week (i.e., drinking) and GPA have r = -0.69, which of the following…

A: When the y variable tends to decrease as the x variable increases, it can be said that there is a…

Q: 133 The chair of the business department hypothesizes that the final grades in a statistics course…

A:

Q: State University Public relations staff at State U.   phoned 850 local residents. After…

A: GivenState university public relations staff at state U, conducted a survey among 850 local…

Q: Let x = (X1, X .. Xy, ....., xm) be a data set with a sample mean Show that E-(x; – x) = 0.

A: Given : Let x = (x1 , x2 , -------, xi,-----,xn) be a data set with a sample mean x¯

Q: A density graph for all the possible heights between 0 inches and 50 inches is rectangular. What is…

A: Let height be the X  X~U(0,50)

Q: What type of statistical test are you conducting if h1 states that the parameter is greater than the…

A: Given that,  h1 states that the parameter is greater than the value claimed in h0.