Mean of sampling distribution of means Standard deviation of the sampling distribution of means

Q: (a) Which of the following must be true about Amanda's and John's scores? Amanda scored higher than ...

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Q: Suppose that the lengths of human pregnancies are normally distributed with a mean of 266 days and a...

A: a) Empirical rule: The probability of the observation lies within 1 standard deviation of the mean,...

Q: Two samples are randomly selected from a population. One sample has n = 5 and the  second has n = 30...

A: The sample sizes are 5 and 30.

Q: 3. A survey found that 70% of all Americans believe Alexander Hamilton was once the president of the...

A: 3) It is given that p=0.70.

Q: Find the critical value(s) and rejection region(s) for the indicated t-test, level of significance a...

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Q: To join the Illuminati, you have to be richer than 84% of Americans. Assuming incomes are  distribut...

A: ,We have given that.   X~N( μ , ?^2 )   μ= 0    , ?=1  for standard normal.    Z-score =( x - μ )/? ...

Q: In the following probability distribution, the random variable x represents the number of activities...

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Q: The average starting salary of individuals with a master's degree in statistics is normally distribu...

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Q: Diastolic 82 74 74 50 89 89 56 62 71 82 ... (Type an integer or decimal rounded to one decimal place...

A: Given: Systolic Diastolic 119 82 127 74 158 74 94 50 156 89 120 89 117 56 137 62...

Q: A random sample of size 15 from a N(µ, o²) population yields = 3.2 and s? = 4.24. Find a 90% confide...

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Q: Basketball player Shaquille O'Neal makes a free-throw shot about 65% of the time Find the probabilit...

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Q: The average person owns about 175 music cds. The standard deviation is about 37 music cds. If Tori h...

A: Given information Population mean µ = 175 CDs Standard deviation σ = 37 CDs We have given that Tori ...

Q: In a study of 420,112 cell phone users, 127 subjects developed cancer of the brain or nervous system...

A: Given data  x= 127  n =420112 p= 0.00034 α= 0.001

Q: The Denver Post reported that a recent Audit of Los Angeles 911 calls showed that 85% were not emerg...

A: Given that  The Denver Post reported that a recent Audit of Los Angeles 911 calls showed that 85% we...

Q: A research team conducted a study showing that approximately 10% of all businessmen who wear ties we...

A: Let X be the random variable from binomial distribution with probability (p) = 10% = 0.10 and sample...

Q: Use the AustStates data. Perform a repeated measures ANOVA using the 9 years as the paired variables...

A: The given F statistics is 9.563 and the number of years is 9.

Q: c. Using the formula for estimating sample size (n), what is the computed value in 2 decimal places?...

A: Here we have to find correct options for given questions like.. critical value sample size. Etc..

Q: The batteries from a certain manufacturer have a mean lifetime of 870 hours, with a standard deviati...

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Q: Due to random chance, it is possible to obtain a sample of scores with a weak, moderate, or strong c...

A: Given statement: Due to random chance, it is possible to obtain a sample of scores with a weak, mode...

Q: The standard deviation in the pressure required to open a certain valve is known to be o = 0.8 psi. ...

A: Note: Hi, thank you for the question. As per our company guideline we are supposed to answer only fi...

Q: The joint probability distribution of two random variables X, Y is given in the table below. Y=-4 Y=...

A: Given data is  

Q: Dr. Volz gave an exam with 14 questions, but students only had to answer 10 of them. Suppose the exa...

A: We have to use combination formula. Formula : Crn = n!r!(n-r)! 

Q: A math teacher claims that she has developed a review course that increases the scores of students o...

A: We have given that  Sample size n =2200 Sample mean =525 Standard deviation =110  

Q: Check here for instructional material to complete this problem. X-m Evaluate the expression for x= 3...

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Q: Waiting times (in minutes) of customers at a bank where all customers enter a single waiting line an...

A:   Hence, the coefficient of variation for Bank A is 6.3% .            

Q: A student earned grades of B, C, A, B, and D. Those courses had these corresponding numbers of credi...

A: Find GPA 

Q: it be appropriate to use a normal distribution to approxi- mate the binomial distribution?

A: for normal distribution to approxiamte  the binomial distribution  np ≥10  and n(1-p)≥10  

Q: Select the best explanation for the image below: Select one: O a The collections of marks can be con...

A: The collection of marks is neither accurate not precise

Q: 2. Apparently it is a fact that 12% of people buy their pet a gift on Valentine's Day. a) If you sur...

A: Since each person has the only options of "buying a gift for a pet" (i.e., assumed as success) or "n...

Q: The combined SAT scores for the students at a local high school are normally distributed with a mean...

A: Given: Mean = μ=1457 Standard deviation = σ =297

Q: Compare the “prop. contained” value from the chart to the confidence level associated with the simul...

A: Given information: The output of confidence interval for proportion is given.

Q: A drum contains 4 black balls, 5 red balls and 6 green balls. If 5 balls are selected at random, fin...

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Q: A Nevada roulette wheel has 38 pockets. One is numbered 0, another is numbered 00, and the rest are ...

A: From the given information, A roulette wheel has 38 pockets. One is numbered 0, another is numbered ...

Q: ratnon 19. While throwing 5 dice 30 times, a person obtained 6 a. total of 23 times. Can we consider...

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Q: The next five questions refer to the following scenario: • sample mean x = 10 • sample sizen = 100 p...

A: The random variable X follows normal distribution. We have to write the form of the confidence inter...

Q: The mean age when smokers first start is 13 years old with a population standard deviation of 1.8 ye...

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Q: State whether the standardized test statistic t indicates that you should reject the null hypothesis...

A: Given : Diagram which shows acceptance and rejection region for 2 tailed test Standardized test sta...

Q: 70 85 89 76 25 54 30 87

A: We have given data are 70,85,89,62,65,76,25,54,56,41,7,30,87,58,58,56,13,100,64,26,26,64,10,44,91

Q: Newborn babies in public hospitals in a certain city weighs on average 3.5 kg with a standard deviat...

A: Given that  μ= 3.5 , σ= 0.65 Formula for Z-score Z=(X-μ)/σ

Q: please send solution for Q3 part b

A: Graphs: The diagrammatic representation of connectivity between the networks and edges for creating ...

Q: Solve for the following: Expressed final answers in 4-decimal places.  Compute for the coefficient ...

A: Assume that the variable fertilizer used as x and the variable corn produced as y.

Q: 6. Show that 1 s2 = TE2-1(Xi – x)² is unbiased estimator of the population variance o?

A: Show that S^2 is unbiased estimator of population variance

Q: The probability that a single radar station will detect an enemy plane is 0.65. (a) What is the smal...

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Q: In how many ways can a Riders Org. chapter with 30 directors choose a president, a vice president, a...

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Q: How  many possible arrangement could be made using the following letters       N    B   P    Q   N ...

A: We have given that the 9 letters N    B   P    Q   N   A  P  B  P In which some of the letters repea...

Q: a) Either by using the formula or the binomial chart, fill in the following probability distribution...

A: Here given unfair coin tossed 4 times P= probability of head =0.75

Q: 5. Explain what is meant by BLUE estimates and the Gauss-Markov theorem. Mathematic relevant proofs ...

A: The Gauss Markov theorem tells us that if a certain set of assumptions are met, the ordinary least s...

Q: A college entrance exam company determined that a score of 21 on the mathematics portion of the exam...

A: For the given data ( a ) Appropriate hypotheses ( b ) verify the requirements

Q: Find the medians. The median for males is beats per minute and the median for females is beats per m...

A: Given: Male Female 86 66 91 86 56 92 68 90 83 79 60 89 61 90 72 77 63 95 74 ...

Q: suppose that in a casino, a certain slot machine pays out an average of php 15, with a standard devi...

A: Given The data is as follows: Mean of payout = php 15 SD of payout = php 20