A random password app gives you an independent string of 6 unpredictable letters a-z. You are part of a study group of 7 people, each of whom has a random password. What is the probability that you and your best friend have the same first letter in your passwords? O.143 .0385 O.0204 O.00463

Q: Y, = XB + ɛ, Show that the model variance in model Yi unbiased estimator of

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Q: The 5- number summary is 0.53, 0.74, 1.19, 1.355, and 1.49

A: The five-number summary consists of the following statistics: Minimum, Lower quartile, Median, Upper...

Q: Suppose Var(X) = 99. What is Var(.65X)?

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Q: What are some ideas for practice problems that use the regression equation?

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Q: Express the null hypothesis and the alternative hypothesis of the following in notation form 1. A ra...

A: Claim: average age of working students is different from 19 years

Q: Blank Filling Question. No work is required or graded. In regression analysis, multicollinearity occ...

A: Indicators of multicollinearity 1. The explanatory variables are not independent 2. The rank of matr...

Q: Create excel file and solve this problem in that file A company claims that the course they offer si...

A: Given:   Before After 81 97 75 72 89 93 91 110 65 78 70 69 90 115 69 75 n = 8 ...

Q: Expected retum and standard deviation. Use the following information to answer the questBAS a. What ...

A: INTRODUCTION :  EXPECTATION:  let X be a discrete random variable and having probability  P(X=x) the...

Q: A researcher wishes to determine the average number of hours per month that NUIG students spend on s...

A: We have given that the mean 31 hours, standard deviation 9 hours and sample size n is 48. Standard e...

Q: a. State the null and the alternative hypotheses b. compute the test statistic c. determine the crit...

A: a). Given: n=35μ=27900x¯=28000σ=250.5 The null and alternative hypothesis is given as: H0:μ=27900Ha:...

Q: A man plays a dice game that involves throwing 3 dice at a time. His winnings are directly related t...

A: Given : Number of threes     Expected Count        Observed Count  0                                ...

Q: What is the key advantage of the Logit Model over the Linear Probability Model?

A: Logic model- It is also defines as logistic Regression, is a binomial regression model. It  is used ...

Q: The standard deviation for the Sum of Squared Errors of the data set in the scatterplot below is 4.8...

A: From the given information

Q: a] State the null and alternate hypotheses. Also state if the test is left-tailed, right-tailed, ...

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Q: A population consists of the following five values: 1, 2, 3, 3, and 4. List all samples of size 2 ...

A: A population consists of the following five values: 1, 2, 3, 3, and 4. List all samples of size 2 ...

Q: Poisoning by the pesticide DDT causes tremors and convulsions.   In a study of DDT poisoning, resear...

A: Given data, 6, 1.7, 1.8, 1.9

Q: a.  Which measure of association would be most appropriate for these variables? b.  What is the valu...

A: Association is used to measure whether two or more variables are related to each other or not. The d...

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A: According to historical data, the 240 individuals lived a mean of 78.2 years with standard deviation...

Q: I need help with 5 a,b,c

A: a part Total Number of candies = 37  Red candies = 10 p^=1037=0.27 The proportion of red candies are...

Q: The sample consisted of 30 night students, with a sample mean GPA of 2.67 and a standard deviation o...

A: Let night students be denoted by x1 and day students x2 Given, n1=30x1=2.67s1=0.02n2=65x2=2.62s2=0.0...

Q: If E(X)= 48, then what is E(4 + 0.83*X)? (Use two decimal places, ex: 12.34)

A: We have given that,  X is a random variable and E(X) = 48 Then,  We will find ,  E(4 + 0.83*X) = ? 

Q: Calculate P(X< 21). Calculate P(25 <X < 29). Accuracy to 2 decimal places. Answer as a decimal not p...

A: Let X be the random variable which follows normal distribution with mean 27, and standard deviation ...

Q: In a random sample of 200 adults, 136 say they are in favor of outlawing cigarettes in certain areas...

A: H0: p=0.6  vs   Ha: p&gt;0.6 It is a right tailed test.

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A: Since we answer up to 3 subparts, we'll answer the first 3. Please resubmit the question and specify...

Q: CNNBC recently reported that the mean annual cost of auto insurance is 1018 dollars. Assume the stan...

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Q: (a) A red card P (red card) = %3D

A: Total number of cards in a deck = 52 Number of red cards = 26  

Q: A six-sided number cube is rolled 350 times and the results are recorded as follows: 58 ones, 63 two...

A: We have given that a six-sided die is rolled 350 times recorded as follows: 58 ones, 63 twos, 52 thr...

Q: You are interested in finding a 98% confidence interval for the mean number of visits for physical t...

A: The mean is:   The table that shows the necessary calculation is shown below: x x−¯x (x−¯x...

Q: The following graphs show the number of juniors and seniors that have all A's after 3 quarters. Grap...

A: In graph A there is much difference between junior and senior , there vertical scale start from twen...

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Q: (Problem Set #8) A new soft drink is being market tested. A sample of 120 individuals participated i...

A: To test:H0:p=20%=0.2H1:p&gt;0.2

Q: In 2018, Lebanon's average income was $8,269.79 US dollars. The exchange rate was 1,507.50 per US do...

A: Given, Lebanon's average income = $8,269.79 US dollars Exchange rate was 1,507.50 per US dollar.

Q: #12

A: Answer: C. Assign the digits 1,2 to represent the spinner stopping in the section labeled "JACKPOT" ...

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A: Given that,  The proportion us p= 77% = 0.77 And sample size is n= 110 So X~ Binomial (110,0.77)  

Q: 111)   Give a 99.5% confidence interval, for μ1−μ2μ1-μ2 given the following information. n1=30n1=30,...

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Q: A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of...

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Q: A probability experiment is conducted. Which of these cannot be considered a probability outcom O 0....

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Q: Assume x is exponentially distributed with a mean of 4. Find: a.P(X=2) b.P(X&lt;2) c.P(X&gt;=2) d.P(...

A: As per guidelines we are allowed to solve maximum of 3 subparts, Please repost the question if you n...

Q: The annual demand forecast for a particular product sold by a retail store is 10,000 units, the cost...

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Q: What is the setup of the null and alternative hypotheses for this test?

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Q: In a survey, 30 people were asked how much they spent on their child's last birthday gift. The resul...

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Q: 1. It has been reported that many university students are increasingly stressed out as a result of t...

A: The given options: Hypothesis ANOVA Regression

Q: Use the sample data and confidence level given below to complete parts (a) through (d). A research i...

A: Answer is given below:

Q: The mean amount purchased by a typical customer at Churchill’sGrocery Store is $23.59, with a standa...

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Q: A researcher was interested in comparing the amount of time (in hours) spent working out by women an...

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Q: What is the answer??

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Q: The daily revenue at a university snack bar has been recorded for the past five years. Records indic...

A: Question 1 option a

Q: Daria asked her classmates how many brothers and sisters they had. Which of the following statements...

A: From the histogram, we got some result e.g most of the classmates have 1 sibilling  

Q: #2 please

A:  The true means' difference CI is given by, (x¯1-x¯2)±Zσ12n1+σ2n2where,x¯1 and x¯2=sample meansσ1 an...

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.