Suppose X ∼N (-4,1. Between what xx values does 99.72% of the data lie?

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A: For country C n=1024,p hat =0.45 For country D n =1078 ,p hat = 0.41

Q: Researchers conducted a study to estimate the relationship between a subject's brain activity while…

A: The following information has been provided: Sample Mean 1 (Xˉ1​) = 5.6 Sample Standard…

Q: The table to the right classifies a stock's price change as up, down, or no change for both today's…

A: There are two categorical variables which are Price Change Today and Price Change Previous Day. We…

Q: Illustration 17.5. Find the chance of getting 3 successes in 5 trials when the chance of getting a…

A:

Q: Suppose that the profits made by a construction company in four projects were 3, 2, 4 and 6%,…

A: The formula of the mean is,

Q: Given: 4 = 43,0 3. What is the raw score when:

A: Let X be the raw score from normal distribution with mean (μ) = 45 and standard deviation      (σ) =…

Q: Determine the null and alternative hypotheses for the test. Choose the correct answer below. O A.…

A: The following information has been provided : The row and column total have been calculated and they…

Q: 5-x-3 > 3 4.

A:

Q: d. Find the p-value and draw a Normal curve with z-statistic and appropriate shaded region. Normal…

A: The scientists observed that 10 of the 50 metal tagged penguins survived, compared to 18 of the 50…

Q: 100% = 100/100 =

A: Given: 100% = 100/100

Q: Suppose r is .84, compute proportion of variation is explained?

A: From the given information, it is observed that r=0.84.

Q: It is thought that prehistoric Indians did not take their best tools, pottery, and household items…

A: Suppose x defines the elevation in thousands of feet.

Q: Find the z-score that separates the largest 5% of scores from the rest.  Round your result to 3…

A: Obtain the z-score that separates the largest 5% of scores from the rest. The z-score that separates…

Q: Find the mean of th percent change in market share for the control cities. Test Cities       1 =…

A: In the given problem we have given that, the market share for the test cities and control cities. We…

Q: a survey of Town X found an average of 3.2 perosns per household and a mean of 1.2 televisions. I f…

A:

Q: It is thought that prehistoric Indians did not take their best tools, pottery, and household items…

A: Answer X               Y 6.00           96.50           266.75           557.50           628.00…

Q: Find the variance of X X: 73,51,73,182,45,90,111

A:

Q: Suppose  X∼N(−9,4) . Between what  x  values does  95.48%  of the data lie? The range of  x  values…

A: Given; X~N(-9,4) meanμ = -9variance(σ2)=4 ⇒ standard deviation(σ)=2between what x value does 95.48%…

Q: 2. Ten randomly selected gold mines produced 21, 19, 20, 22, 24, 21, 19, 22, 22, and 20 barrels of…

A: Solution-: Given: μ0=22.5,α=0.01 (or 1%) Given data: 21,19,20,22,24,21,19,22,22,20 Is this enough…

Q: dentify the claim and state Ho and H. The claim is "the proportion of adults in Country C who favor…

A: Given that  Sample sizes for Country C and D n1=1024 , n2= 1078 Level of significance =alpha = 0.09

Q: M= 90 SD= 7.8 What raw score is needed to be in the top 8%?

A: *Mean μ=90SD σ=7.8Top 8%⇒P(X>x)=0.08⇒P(X≤x)=092Corresponding  z-score is obtained as

Q: An environmentalist wants to determine the relationships between the numbers (in thousands) of…

A: The following information has been given: Number of fires (x) Number of acres burned (y) 72 62…

Q: Is y significantly different from -0.5?

A: The coefficient of γ is 74.3, the corresponding standard error is 52.98 and the degrees of freedom…

Q: 1.128 Find an SAT percentile. Reports on a student's ACT or SAT results usually give the percentile…

A: Suppose a random variable X, defines the SAT scores of a student.

Q: USE 2 DECIMAL Researchers conducted a study to estimate the relationship between a subject's brain…

A:

Q: A popular blog reports that 45% of college students log in to Instagram on a daily basis. The Dean…

A: Given  p=45%, n=203, X=106 , level of significance ɑ=0.06 Note: According to Bartleby guidelines…

Q: Find 0.2% of 810

A: Given query is to find the 0.2% of 810.

Q: 1/2% of 412

A:

Q: 14. Estimate y; from the following data : 81 and explain why the value obtained is different from…

A: Given that : X and yx  values are given here by using these value we find missing value of yx  at x…

Q: Find the z-score that cuts off 40% in the tail on the left

A: Our aim is to find the find the z-score that cuts off 40% in the tail on the left

Q: During the first half of the year, 686 patients were admitted to the cardiovascular care unit. Of…

A: From the provided information, Number of patients who were admitted to the cardiovascular during…

Q: Illustration 15.24. A correlation coefficient of 0.5 does not mean that 50% of the variauce is…

A:

Q: 6. Find the variance if X~N(0, ¿) and 95% of the data are between -7 and 7.

A:

Q: Where did the 25% come from?

A: Since we know that 25% difference between each quartile