Suppose a simple random sample of size n = 64 is obtained from a population with μ = 84 and o = 16. (a) Describe the sampling distribution of x. (b) What is P (x>87.2) ? (c) What is P (x≤ 79.4)?

Q: You have 100 people take two tests, A and B. You find that 40 people score above average on Test A…

A: Given that 100 people take two test : A and B.

Q: Here is a scatter plot for a set of bivariate data.

A: here is given four correlation coefficient values -0.9, -0.6, 0.6, 0.9.

Q: parts of question 7. solve A-E A. Compute P(X = 3) for n = 5, p = 1

A: Note: Questions A, B, C, D, and E  are three different questions. As per the answering guidelines I…

Q: manufacturer knows that their items have a normally distributed length, with a mean of 8.1 inches,…

A: given data, normal distribution ,μ=8.1σ=2.5n=24p(x¯<7.2)=?

Q: Question 12 The Census Bureau of the US Department of Commerce estimated that average e-commerce…

A: As per our guidelines we are suppose to answer only one question kindlypost the remaining question…

Q: What is the test statistic for this sample? (Report answer accurate to three decimal places.) test…

A: For Sample 1:

Q: The heights (in cm) of students in a class are: {156, 152, 148, 159, 150} a) Determine the mean…

A: The following information has been provided: 156, 152, 148, 159, 150 The number of observations are…

Q: See image for likelihood. Differentiate the log-likelihood with respect to β to obtain the equation…

A:

Q: If a customer has to wait in an (M/M/1): (/FIFO) queue ystem, what is his average waiting time in…

A: It is given that  λ = 8 per hour μ = 12 per hour

Q: Shamma conducted a left-tail test to determine whether ZU students sleep, on average, less than 7…

A: We have given that the  p-value for the left tailed test is p-value = 0.125

Q: Customers arrive at a one-man barbershop according to a Poisson process with a mean inter-arrival…

A:

Q: Before After 6.9 6.3 3.6 2.1 7.3 7.1 12.8 8.6 8.5 8.2 10.1 6.4 8.4 3.9 5.2 2.1

A: We find the differences of ‘before’ and ‘after’. di= Xi-Yi

Q: Problem I To test the effect of direct sunlight on seed production, a scientist tested seed…

A: Given that, Plant Top Bottom 1 40 28 2 44 42 3 51 48 4 43 42…

Q: Use the given stock table to find the dividend for ABC Technologies (ABC). 52-Week Yld High Low…

A:

Q: Suppose a mutual fund qualifies as having moderate risk if the standard deviation of its monthly…

A: The sample size is 23, sample standard deviation is 5.37% and population standard deviation is 6%.

Q: Suppose Diane and Jack are each attempting to use a simulation to describe the sampling distribution…

A: a) Diane's distribution is expected to be skewed right, but not as much as the original…

Q: The proportion p of residents in a community who recycle has traditionally been 70%. A policy maker…

A: GIVEN DATA, normal distribution claim :p<0.70n=200x=135p^=xn=135200=0.675

Q: Suppose the researcher obtains a 95% confidence interval of (6.9, 7.3). What is the margin of error?…

A:

Q: 7. The average monthly rainfalls in both Mt. Washington, New Hampshire and Quillayute, Washington…

A: A. Rainfall in inches in each month in both cities. B. 2 C. 10 D. 8.42 , 8.583 E. 8, 8.5

Q: 6. 7. With U = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15), A = (2, 5, 7, 11, 13), B = $1,…

A: Method: By Using the intersection and union of the events to find the probability

Q: Suppose there is a claim that a certain population has a mean, μ, that is less than 6. You want to…

A: a)   The population mean is μ.

Q: Answer these questions of probabilities please. A.) What is the probability of getting a sum of less…

A:

Q: O 6. A technology magazine wants to know about how teenagers with their own cell phones use…

A: The median is less affected by outliers and skewed data than the mean, and is usually the preferred…

Q: A population of values has a normal distribution with μ=113.6 and σ=14. You intend to draw a random…

A:

Q: If a coefficient is not statistically significant, what does that mean? 1   There is omitted…

A: In the regression analysis, we want to test the significance of the model that means we want to see…

Q: True or False: 1. If P(X) = 0.5 and P(Y) = exclusive events if P(X n Y) = 0.25 0.5, then X and Y are…

A: For the given statements, we need to answer True/False.

Q: grades, athletic ability, or being popular was most important to them. The two-way table summarizes…

A: Given data:

Q: True or False: 1. If a random variable is discrete, it always has a finite number of possible…

A: As per our guidelines I can solve only first three subparts. Kindly post the remaining subparts…

Q: Two suppliers manufacture a plastic gear used in a laser printer. The impact strength of these…

A: Given: Two suppliers manufacture a plastic gear used in a laser printer. The impact strength of…

Q: Do a curve fit using the nonlinear regression method and use a polynomial modeL

A: Given the data as deformacion unitaria esfuerzo (Pa) 0.1338 494.14 0.2675 912.79 0.3567…

Q: Aaron's Word Processing Service (AWPS) does word processing. The rate for services is $32 per hour…

A: Given: The rate for service is = $32 per hour One-time charge = $31.50 Formula Used: Y = a + bX

Q: The amount of time that a customer spends waiting at an airport check-in counter is a random…

A: Given,sample size(n)=49mean(μ)=10.2standard deviation(σ)=1.5

Q: Running Shoes. A shoe designer tests a new material for the soles of their most popular line of…

A: Given data: Runner New material wear Old material wear 1 1.14 1.03 2 1.04 0.87 3 1.08 0.96…

Q: Describe the sampling distribution of p. Assume the size of the population is 20,000. n = 200, p =…

A:

Q: Imagine tossing a fair coin 3 times. Give a probability model for this chance process. Sample space…

A: given data  toss a fair coin 3 times  we have to find sample space  here the coin is fair .  so,…

Q: A researcher is going to perform a right-tailed hypothesis test. The test statistic will follow a…

A:

Q: Which of the following response categories would be a nominal level measure for the variable good…

A: Nominal level measures are the measures which doesn't use any quantitative value. Here option D and…

Q: A national online business magazine reports that the average cost of a speeding ticket in Miami,…

A: A random sample of 16 observations is given. The population standard deviation is 12. We have to…

Q: If the variance of the sum is Var(X+Y) = 6 and Var(X) = Var(Y) = 4, then what is the correlation…

A: given data  Var(X+Y) = 6 Var(X) = Var(Y) = 4 corr(X,Y) = ?

Q: Assume that the readings on the thermometers are normally distributed with a mean of 0° and standard…

A:

Q: Medium Lead Level High Lead Level 72 n₂ = 11 99 92 X₂ = 89.615 S2 = 10.573 85 84 97 83 92 104 111 91

A:

Q: ou are concerned that nausea may be a side effect of Tamiflu, but you cannot just give Tamiflu to…

A: give data  p = proportion of people taking tamiflu and  experience nausea claim : p >0.30 α =…

Q: QUESTION 3 If you rejected Ho at the 0.10 level of significance, then O you may reject it at the…

A: Method:  Reject H0 , if P-value is less than the level of significance.

Q: A large super market chain is doing market research in the City of Long Beach to determine whether…

A: Hypothesis test are used to measure the mean significance between the sample and population. If the…

Q: Shade the Venn Diagram to show the set. DUF'

A: venn diagram for set D∪F'

Q: 20. What are the Level of Measurement of the statistical variables? Nominal, Ratio, Interval, or…

A:

Q: Researchers are investigating whether people who exercise with a training partner have a greater…

A: Given:-             Researchers are investigating whether people who exercise with a training…

Q: The manufacturer claims that your new car gets 35 mpg on the highway. You suspect that the mpg is a…

A: One sample t-test is used to compare the significance difference between sample mean and population…

Q: I estimate a multiple linear regression model with four explanatory variables and a sample size of…

A: Given that: Sample R-square, R2=0.651948 Total sample size, n=255 Number of predictors / independent…

Q: In a survey of 3352 adults, 1435 say they have started paying bills online in the last year.…

A: From the provided information, Sample size (n) = 3352 From which 1435 say they have started paying…