A normal distribution has a mean 80 and standard deviation is 10. What is the probability of randomly selecting score greater than 90 from this distribution?

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A: When a die is rolled there are 6 possible outcomes 1,2,3,4,5,6. When two dice are rolled then the to...

Q: a city council consist of eight democrats and four republicans. if a ommittee of four people is sele...

A: Given that there are 8 Democrats and 4 republicans There are total (8+4)=12 persons We can select an...

Q: Assume that 2 cards are drawn without replacement from a standard 52-card dec. What is the probailit...

A: Given: To find the probability of choosing a queen and then an ace without replacement from a 52-car...

Q: Starting salaries of 95 college graduates who have taken a statistics course have a mean of $43,978....

A: Given, sample size = 95 The sample mean 43978 The population standard deviation is 9989. α=0.15

Q: A company gives each worker a cash bonus every Friday, randomly giving a worker an amount with these...

A: Given: Company bonus for employees.  

Q: To win a point in racquetball, a player must serve and then win a rally. If p is the probability of ...

A:

Q: One card is selected at random from a deck of cards. Determine the probability of selecting a card t...

A: Less than 7 cards means= A,2,3,4,5,6Each denomination has 4 cards. So total (6×4)=24 cards are less ...

Q: The null and alternative hypotheses for a hypothesis test of the difference in two population propor...

A: The null and the alternative hypothesis for the test should be μ1=μ2 and μ1≠μ2 respectively. Since Z...

Q: The probability that a certain machine turns out a defective item is 5%. Find the probabilities that...

A: Determine the expected value of the number of defective items.   The expected value of the number of...

Q: Consider the following scenario. the five-number bet   (a) Find the expected value of each $1 bet in...

A: In the casino game roulette, a wheel with 38 spaces(18red, 18 black, and 2 green) is spun. In 1 poss...

Q: 1. A sports shop selects a random sample and records the sales of items made in China and those made...

A: Part (a) Calculate the SE Mean for the sales from China, SEmean=σn=9.7550=1.3788 Therefore, the SE M...

Q: 101. Suppose that P, the price of a certain commodity (in dollars), and S, its total sales (in 10,00...

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Q: In a study conducted by the Department of Human Nutrition and Foods at Virginia Tech, the following ...

A: In this context, it is appropriate to use paired t test. d=Before-After. μ1 is the sorbic acid resid...

Q: Use the data given in the table below to compute the probability that a randomly chosen voter from t...

A: From the Given Table, GrandTotal = 3228 Total for 18 - 28 years = 847 Total for 29- 38 years = 804 T...

Q: 6. In a call center that stays open all the time, calls arrive as a Poisson process with a mean rate...

A: Given information: Average number of complaints per hour = 0.30 a)  x = 50 Average number of complai...

Q: Both sets of values have an average of 13. Is Set A's standard deviation smaller, larger, or about t...

A: The data are given for sets A and B standard deviation can be calculating by using formula, σ=∑(x-x)...

Q: Assume that you are drawing two balls without replacement from an urn that contains 11 green balls, ...

A: Given: Number of green balls=11 Number of blue balls=10 Number of red balls=5 Total number of balls=...

Q: I'm so sorry the question is upside down, but can you please cover question 25 about tennis?

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a...

Q: If the odds of two people sharing the same STR pattern at any region is 0.1 in a population, what is...

A: The odds in favor of A is defined as P(A)P(A') Given that, the odds of people sharing same pattern i...

Q: The thickness of a wooden shelf in mm, has probability density function             f(x) = {0.75 – ...

A: Given that :f(x)=0.75–0.75(x–5)2 , 4≤x≤60, otherwiseWe will make a table for the function  x 2 3 ...

Q: 6. A sample poll of 500 voters from Michigan and 300 voters from Wisconsin showed that 51% and 49% i...

A: Given, n1=500, p1=0.51n2=300, p2=0.49 α=0.05

Q: Office Equipment, Inc. (OEI) leases automatic mailing machines to business customers in Fort Wayne, ...

A: Hi, thanks for the question. As per our policy, we can answer only 3 subparts per question. 

Q: A medical researcher wants to investigate the amount of time it takes for patients' headache pain to...

A: From the given information, Margin error (E) = 3 Standard deviation = 17   The objective is finding ...

Q: Please give full explanation.  Thank you.

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Q: You are performing a two-tailed test with test statistic z = 2.75, find the p-value to 4 decimal pla...

A: Given: Z-value Z=2.75 As we have to perform Two tailed test for p-value.

Q: The two last subparts please (d and e)

A:   (d) The number of numbers from 1 to 1000 divisible by 5 is 1000/5=200. If we want to count the num...

Q: A random sample of 40 students has a mean annual earnings of $3120. Assume the population standard d...

A: GIVEN DATA: Random sample of 40 students      Mean of annual earning $3120               Population ...

Q: 2. In this problem, the gambler’s idea of odds does not enter at all. a. The odds of an event are 1/...

A: 2 a) Given data: The given odds of an event is x=1/5. The expression for the odds of an event is, x=...

Q: Let S be a sample space and E and F be events associated with S. Suppose that PrE)-04, Pr(F)- .2 and...

A: Given: Pr(E)=0.4Pr(F)=0.2Pr(E∩F)=0.1 a) Let's find Pr(EF) Pr(EF)=Pr(E∩F)Pr(F)Pr(EF)=0.10.2Pr(EF)=0.5...

Q: A teacher offers ten possible assignments for extra credit in a course but requires students to choo...

A: Given that 6 assignments involve library research and 4 are computer programming exercises. Total 10...

Q: Please solve very soon completely

A: Probability: Probability is a chance factor that can occurs at every outcome of a random experiment....

Q: A random sample of 1700 workers in a particular city found 646 workers who had full health insurance...

A: Given, The sample proportion is, Critical value: Using z-table, the z-critical value at the given ...

Q: Kim wants to determine a 99 percent confidence interval for the true proportion of high school stude...

A: From the given information, Margin error (E) = 0.03 Assume sample proportion = 0.5   The objective i...

Q: . The mathematical expression () (read 6 choose 4) numerically results in (а) 1.5. (b) 10. (c) 15. (...

A: Given: 4 chosen from 6

Q: Ch6. "A carpet manufacturing company is comparing the tensile strengths of two different types of sy...

A: From the given information, μA=75σA=12μB=70σB=12nA=16nB=9    

Q: A witness to a hit-and-run accident told the police that the license number contained the letters RL...

A: The license number contains the letter RLH followed by 3 digits, the first of which is 5  can be wri...

Q: Betty's collection of ten albums includes one rock album. Betty will choose five of her albums to pl...

A: Given: Collection has 10 albums including one rock albums. 5 albums are chosen at randomly without a...

Q: A certain game consists of rolling a single fair die. If a four or five comes up, you win 2 dollars;...

A: Calculate the probability of win as, Pwin=Pgetting 4 or 5=26=13 Calculate the probability of loose a...

Q: 4) The time until the light in an office fails is exponentially distributed with mean 2 months. The ...

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Q: Suppose that a class contains 15 boys and 30 girls, and that 10 students are to be selectedat random...

A: GIVEN DATA : There are 15 boys and 30 girls in the class                          10 students are se...

Q: College officials want to estimate the percentage of students who carry a gun, knife, or other such ...

A: a) The confidence level is 93%. Therefore, α = 0.07, α/2=0.035 and 1-α/2=0.965. The margin of error ...

Q: Kay has an 80% probability of making a free-throw in basketball, and each free-throw is independent....

A: Let A be the event that K makes the first throw and B be the event that K makes the second throw.As ...

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.