39. A certain phone manufacturing claimed that their products have hardwares that would last 7 years on average with a standard deviation of 2.3 years. This was concluded after a series of factory tests and checks. If a sample of 10 phones would be randomly selected from this population, what is the probability that the mean durability of the phones will be between5 and 8 years?

Q: Number of States Population Range (millions) 0-4 25 5-9 15 10 14 6. 15 19 20-24 ERA 1 25- 29 30-34 3...

A:

Q: 6. In a second stage of testing to discriminate between true and false positives for these same data...

A: Solution In the second stage prevalence of disease is equal to PPV .

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A: Atlantic hurricanes form off the western coast of Africa. As warm moist air rises, it begins to rota...

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Q: As part of a water quality​ survey, you test the water hardness in several randomly selected streams...

A: Given information- Sample size n = 23 Sample standard deviation s = 18 grains per gallon Confidence ...

Q: M&M/MARS, makers of M&M chocolate candies, conducted a national poll in which more than 10 million p...

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Q: 1. There are two boxes, each of which contains a certain number of cubes and balls, painted in eithe...

A: Given:   Box 1 Box 2   Red Blue Red Blue Cube 6 24 28 42 Ball 14 56 12 18 Total 20 80 40...

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Q: According to the February 2008 Federal Trade Commission report on consumer fraud and identity theft,...

A: # Given: no of favourable cases x=321    total no of cases n=1432  then to find sample proportion p^...

Q: professor has noticed

A:   The regression line is: ŷ = -0.585X + 7.459

Q: Measures of Dispersion  Solve for the range, variance, and standard deviation of this data: 40, 34, ...

A: Solution This data is assumed to be population data.  

Q: Refer to the table below:                                      Do you smoke? Sex                  ...

A: Answer is 2.36  

Q: Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a)...

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Q: Find the critical value zc necessary to form a confidence interval at the level of confidence shown ...

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Q: A pair die is rolled once. Find the probability that the number rolled is not a 5.

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Q: Using the relevant Tables, find the critical values for a 98% confidence interval using the chi-squa...

A: Given : df = 20 Significance level, α =1- 0.98 = 0.02

Q: A family has four children. What is the probability that exactly 3 of the children are girls? In thi...

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Q: Use the t-distribution to find a confidence interval for a difference in means μ1-μ2 given the relev...

A: # Given data values ; x¯1=5.6, s1=2.4, n1=10 and x¯2=4.3, s2=2.5, n2=8 then to find 95% confidence i...

Q: ng the car insurance sample data below, calculate the range, variance and standard on. Discuss which...

A: Solution We Standard Deviation is the measure of variation  

Q: Find the P-values while (hypothesis) testing mean. The principal of a school wants to test the avera...

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Q: 30 12 94 47 10 108 25 17 112 51 16 178 40 94 51 19 175 74 7. 170 36 12 117 59 13 142 76 16 211 a. De...

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Q: Given: U=f1,2,34 5.6.7,8, a's A={1,2,5,6,85 B- 42,4.5,2,9y C- {1, 4.5,6.9) 1.) A'nC b) BnC' c) (A'U ...

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Q: A random sample of 843 births included 432 boys. Use a 0.10 significance level to test the claim tha...

A: A Random sample of 843 births included 432 boys.use a 0.10 significance level to test the claim that...

Q: Company records indicate that at most 49% of employees commute to work using public transportation. ...

A: Solution  

Q: Two cards are selected from a standard deck of 52 cards with replacement. What is the probability th...

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Q: 3. Let X, Y be two random variables. Suppose X ~ Unif(0, 1)), and Y|X = 1 ~ Unif((0, e-)). (a) Give ...

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Q: ased on the data shown below, calculate the correlation coefficient (to three decimal places) x y ...

A: Calculate Correlation Coefficient r without cov(x,y) from the following data X Y 1 31.08 2 29...

Q: Claim: Most adults would erase all of their personal information online if they could. A software fi...

A: The sample proportion is 99.3% and sample size is 640.

Q: A certain drug is used to treat asthma. In a clinical trial of the drug, 20 of 280 treated subjects ...

A: Answer- A test of the claim that less then 11% of treated subject experienced headaches.   

Q: Step 4 of 6: According to the estimated linear model, if the value of the independent variable is in...

A: The equation of regression line is ŷ= bo + bx Where bo is Y intercept And b1 is slope

Q: General Instruction: Write your answer in a one-whole-sheet yellow paper. You may use more than one ...

A: Solution Weighted mean is 2.56

Q: Suppose X is a discrete random variable with a binomial distribution with n = 8 and p = 0.2. Suppose...

A: It is given that n=8 and p=0.2.

Q: Suppose you take a sample of 25 Reese's pieces. The proportion of orange is 0.55. What is the p-valu...

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Q: The accompanying table provides the data for 100 room inspections at each of 25 hotels in a major ch...

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Q: An Internet service provider sampled 540 customers and found that 90 of them experienced an interrup...

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Q: 2) You want to examine competition in barnacles. You examine two species and count the number of eac...

A: Chi square test of independence

Q: The time it takes for a compact fluorescent bulb to reach full brightness is normally distributed wi...

A: Answer - A normally distributed with mean  μ =  29.9 seconds and standard deviation σ = 4.1 seconds....

Q: 104.5 46.1 58.1 22.7 92.7 34.1 75.2 31.6 79.9 27.6 90.6 34.9 71.6 30.7 78.4 53.8 63.8 Find the cor...

A: We want to calculate correlation coefficient and coefficient of determination 

Q: A _________confidence interval would result from increase the sample size. (A) narrower (B) wider ...

A: Solution: The confidence interval can be calculated by using the following formula:

Q: The prices of a random sample of 22 new motorcycles have a sample standard deviation of $3717. Assu...

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Q: Data for fuel economy ratings in mi/gal for different cars are listed below. Each pair of data repre...

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Q: 37. A woman wants to invest in the stocks of a certain company. She can earn PHP 100,000 in one year...

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Q: Refer to the table below:                                      Do you smoke? Sex                  ...

A: Given that                                                                       Do you smoke ? S...

Q: p is 0.2

A: Sample mean is an estimate of population mean Sample mean = (4+5+6)/3 = 5 here, population is geomet...

Q: In a program designed to help patients stop smoking, 150 patients were given sustained care, and 82....

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Q: The heights of women aged 20 to 29 are approximately Normal with mean 64 inches and standard deviati...

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Q: category of individuals

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Q: B. Directions: For each of the following, calculate the mean, median and mode. Show your solution. (...

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Q: What is the margin of error for tge valyes of c=0.95, s=5, n=16?

A: