What is the critical value? what is your decision about this research study? Write up your results as you would see them in an APA style write up

Q: A textile fiber manufacturer is investigating a new drapery yarn, which the company claims has a…

A: The population mean is 12, population standard deviation is 0.5, sample size is 4 and sample mean is…

Q: iii. iv. is the distribution of the average score exactly or approximately normal? Explain. The…

A:

Q: A simple random sample of size n is drawn. The sample mean, x, is found to be 18.6, and the sample…

A: GivenMean(x)=18.6standard deviation(s)=4.3

Q: Explain Gambler’s Ruin for a project in Probability course and find some ideas of how I can proceed…

A: Given:: Gambler’s Ruin for a project in Probability course.

Q: A wildlife biologist is interested in comparing the mean number of miles flown per day by two types…

A: given data x¯ = 131.8s1 = 10.3n1 = 31x¯2 = 129.5s2 = 11.5n2 = 36hypothesisH0 :  μ1 = μ2H1 :  μ1 <…

Q: SAT scores are distributed with a mean of 1,500 and a standard deviation of 300. You are interested…

A: Given information: σ=300μ=1500confidence level=95%=0.95Margin of error , ME=25 Significance level is…

Q: Thunderstorm Speeds A meteorologist who sampled 15 thunderstorms found that the average speed at…

A:

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

A:

Q: Find E(X^2) when random variable X has normal distribution with mean(µ) = 7 and standard deviation

A: Given information: mean(µ) = 7 and standard deviation(σ) = 4. That is, μ=EX=7σ=4⇒σ2=42=16

Q: large food processing company wants to pack exactly 300 grams of tuna fish in a can .It is known…

A: Each hypothesis test make conclusion based on two different approaches. They are critical value…

Q: A population has a mean μ = 86 and a standard deviation o=27. Find the mean and standard deviation…

A: GivenMean(μ)=86standard deviation(σ)=27sample size(n)=24

Q: (d) Compute the standard deviation of the random variable X. 0x = hits (Round to three decimal…

A: Let's solve for the question numbered d, e and f as all the questions before them are answered…

Q: rding to a recent census, 15% of the people in the United States are of Hispanic origin. One county…

A: given data  n = 457 x = 48 claim = p ≠ 0.15

Q: While working in quality control, your job is to make sure that 95% of the 500 products which leave…

A: The main aim of the production process is to maintain the quality of the outgoing lot to 95%. Each…

Q: Dr. Blake is interested in the effects of intoxication on driving ability. Participants are…

A: Please find the explanation below. Thank you.

Q: Problem 1. The Cook's distance is defined as Please show that Di = (Y - Y,))(Y −Y)) (p+1) MSE Di -…

A: Given the Cook's distance is defined as Di=Y^-Y^i'Y^-Y^ip+1MSE

Q: May I know the Q5 and the process

A: Solution-: Given data: 55,46,63,57,61,65,96,55,74,32,67,59 We want to find, (a) Mode=? (b) Give the…

Q: Given a normally distributed population with a mean of 120 and standard deviation of 40, what is the…

A: given data normal distribution μ=120σ= 40n = 16P(x¯≤105) = ?

Q: QUESTION 23 A researcher claims that less than 16% of people who had no healthcare insurance visited…

A: Given,sample size(n)=100sample proportion(p^)=0.12population proportion(P)=0.16

Q: Q is known to be normally distributed with a mean of 100 and standard deviation of 15.  A small…

A: given data normal distribution μ = 100σ= 15n = 49x¯ = 94

Q: For the data in the following table, what is the value of ΣX? X f 4 1 3 2 2 4 1 2 10 15     20…

A: Given data is X f 4 1 3 2 2 4 1 2

Q: A researcher uses a regression equation to predict home heating bills (dollar cost), based on home…

A:

Q: Consider the following Minitab display of two data sets: Variable N Mean SE Mean StDev Minimum Q1…

A: Variable  C1 N  = 20 Mean= 20 SE Mean= 1.62 StDev= 7.26 Minimum= 7 Q1=15 Median= 20 Q3 = 25 Maximum=…

Q: Seat Belt Use In a random sample of 191 men, 63 said they used seat belts. In a random sample of 325…

A:

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: Which of the following would be a good dummy variable?  (Select all that apply.) 1   None of these…

A: Dummy variable is used to decode the categorical data. Dummy variables are coded as 0 or 1.

Q: FAIL? = 0.63 – 0.01*LOAN – 0.08*GIG? + 0.05*COMP Answer the following: Determine the predicted value…

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

Q: Test the claim that the proportion of men who own cats is smaller than 8% at the .01 significance…

A:

Q: Consider the following linear regression model: Yt = Bo + B₁x1t + B₂X2+ + Ut Instead of estimating ,…

A: Given that the linear regression model is,…

Q: Determine the total area under the standard normal curve in parts (a) through (c) below. (...) (a)…

A: given data  standard normal curve Z~N(0,1) area under standard normal curve represents probability.

Q: doctor wants to estimate the mean HDL cholesterol of all 19-year-old females. How many subjects are…

A: Given,margin of error(E)=3standard deviation (s)=18.5

Q: Listed below are the overhead widths (in cm) of seals measured from photographs and the weights (in…

A: The data shows the overhead widths of seals and the weights.

Q: The relationship between the number of games won by an NHL team and the average attendance at their…

A: The following information has been provided: The regression model is : attendance^=-2600+225 wins.…

Q: Midterm 2 Define Sample proportion Random Variable Statistic Margin of error given that PCA) = 0.4…

A: As per our guidelines I can solve only first question. Kindly post the remaining questions again and…

Q: Engineers want to design seats in commercial aircraft so that they are wide enough to fit 99% of all…

A: From the provided information, Mean (µ) = 14.7 Standard deviation (σ) = 0.8 X~N (14.7, 0.8)

Q: For a population of normally distributed scores, μ = 120 and σ = 10, approximately what would be the…

A: Following is the formula for 95% confidence interval of the population mean…

Q: Suppose a randomly selected sample of n = 50 men has a mean foot length of X = 28.1 cm, and the…

A: given data sample size (n) = 50sample mean ( x¯ ) = 28.1sample standard deviation (s) = 495% ci for…

Q: If X and Y are independent random variables and U=X+ Y, complete the proof that the cumulative…

A:

Q: The lifetime of a certain kind of electric bulb may be considered as a RV with mean 1200 hours and…

A: The life time have mean 1200 and standard deviation 250.

Q: The joint p.d.f of two random variables X and Y is given by 1. ƒ(x, y) = = x(x − y),0 < x < 2,− x <…

A: We have given the following joint p.d.f of two random variable x and y f(x,y) = 1/8[ x(x-y) ], 0&lt;…

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: An insurance company is trying to estimate the average number of sick days that full-time food…

A:

Q: A recent research study reported that the mean daily internet usage among preparatory school…

A: GivenMean(x)=125standard deviation(s=25sample size(n)=22significance level(α)=0.01

Q: What does the slope say about this relationship?       For every increase in X of 1, the…

A: The slope of a regression line interprets the change in the dependent variable for a unit change in…

Q: How many randomly selected employers must we contact in order to create an estimate in which we are…

A:

Q: If the sample mean does NOT fall within the central 95% of scores in the sampling distribution:…

A: The 95% confidence interval of the mean defines the range of values within which 95% of the sample…

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

A:

Q: xpress the confidence interval 79.8%±4.9% in interval form. Express the answer in decimal format…

A: Confidence interval are used to determine the range where the true population range lies. It has two…

Q: Find the margin of error for the given values of c, s, and n. c = 0.99, s = 3.1, n = 27 Click the…

A: GivenConfidence level(c)=0.99standard deviation(s)=3.1sample size(n)=27

Q: Researchers conducted a study to determine whether magnets are effective in treating back pain. Pain…

A: Given that: Reduction in Pain Level After Magnet Treatment: n1=15x¯1=0.55s1=0.95 Reduction in Pain…