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Find the 80th percentile of the pecan tree height distribution. If a random sample of 64 pecan trees is selected, what is the standard deviation of the sample mean?
If I roll a fair die 1000 times find the probability the number of threes is strictly between 125 and 165 using excel commands.
The number of nonconforming switches in samples of size 150 are shown below. Construct a fraction nonconforming control chart for these data. Does the process appear to be in control?
(a) Using exponential distribution estimate the average time using the sample mean.
A Normally distributed quality characteristic is monitored throughuse of an x bar and R chart. These charts have the followingparameters n=4
Suppose that 4 candidates run for the governor of a state. How many ways are there in which the numbers of their received votes can be ordered, that is, who is No. 1, who is No.2, and so on. Note t
Give the coefficient of x^k in the expansion of (x + 1/x)^99, where k is an integer between 0 and 99 inclusive. Give explanation for your answer.
Suppose that the probability that an incoming email is a spam is p(S), that the probability that the word w occurs in the subject line of the spam is p(w), and that q(w) is the probability that the
Google analytics analyses and report, Hi, I have a growing travel site. I would like some help with a report written based on the statistics we have from the past year. Website views etc.etc. In o
Suppose that the universal address set address of a vertex v in an ordered rooted tree is 3.2.5.1.5. Find
Test scores for a calculus class had a mean of 69 with a standard deviation of 3.7. Suppose a student gets a 60 on the statistics test and a 87 on the calculus test. Calculate the z-score for each t
Thirty-one percent of those surveyed say they are postponing or reducing the amount of vacation. Twenty officers participating in the survey are randomly selected. The random variable represents the
Suppose f(x, y)=1 & g(x, y)= x+y 0< x <1, 0< y<1 Determine the most powerful test of size alpha =.05 of hyp: (X, Y) ~ f vs. alt: (X, Y) ~ g.
Perform a hypothesis test that the average rent for a two-bedroom apartment is greater than for a one-bedroom apartment. Use alpha=0.10. State your null and alternative hypotheses, calculate the tes
Test the claim the population of sopmohores college students has a mean grade point average of 2.25 versus a mean grade point average greater than 2.25. Sample statistic include n = 71, x-bar = 2.3
If the conditions of a survey sample satisfy those required by the Central Limit Theorem, then there is a 95% probability that a sample proportion will fall within how many standard errors of the po
What is a numerial value that characterize some aspect of a population?
Interpret the value of the vertical intercept for this context in one complete sentence. Use the regression equation to predict the reaction distance if the car is travelling 52 mph.
What are the values of the mean and the standard deviation for the standard Normal model?
Assume that the strength of yarn specimen follows normal distribution. Suppose the manufacturer decides to reject the null hypothesis whenever sample average of 9 specimens exceeds 100.9 psi.
An inspector obtains four samples with three observations in each. The actual measurements (in centimeters) are shown below. She wants to construct 3-sigma mean and range charts, and determine if co
A sample of 100 flights for United Airlines shows that 64 are on time. A sample of 100 flights for American shows that 80 were on time. All flights that were not on time are considered delayed. Anal
A sample of 100 flights for united airlines shows that 64 are on time. A sample of 100 flights for american shows that 80 were on time. Using these figures execute a hypothesis test at alpha=0.05 th
To compute the variance, what should one do?
One important use of regression line is to do which of the following?