For a stats class with a bell-shaped distribution. The mean for the quiz grades is 86 and the standard deviation 6.5 Find the Interval that contains approximately 95% of all data

Q: in a certain school distriet, it was observed that 35% of the students in the element schools were…

A: From the provided information, 35% of the students in the element schools were classified as only…

Q: Thanks to an initiative to recruit top students, an administrator at a college claims that this…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer one question at a…

Q: The Z-score tells you the number of standard deviations away from the mean (and in what direction) a…

A: Given, mean (μ) = 173 standard deviation (σ) = 19 Z score = 0.56

Q: What is the probability that when using an unfair coin, with a head = 2/3 and a tail 1/3: a. you…

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Q: The average mpg usage for a 2017 Toyota Prius for a sample of 10 tanks of gas was 45.5 with a…

A: Introduction: Denote μtoy, μford as the true average mpg usage for the 2017 Toyota Prius and Ford…

Q: Suppose you are testing H0:μ=96 against Ha:μ< 96. From an SRS of 82 individuals, you compute xˉ= 104…

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Q: The Z-score tells you the number of standard deviations away from the mean (and in what direction) a…

A: Formula : z = (X-u) /σ

Q: Based on these findings, can we reject the company's claim that the drug is equally effective for…

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Q: Find the probability that x is between 0 and 2. Draw a picture and accurately label the curve for…

A: Suppose X~N(-3,4).  So Mean = -3 Variance  = 4  Standard deviation  = 2

Q: You wish to test the following claim (HaHa) at a significance level of α=0.005α=0.005.…

A: Given that  H0 : p = 0.5  Vs   H1 : p ≠ 0.5 X = 85 , n = 190 , α=0.005

Q: The president of a large free-standing laboratory claims that 80 percent of his 5,000 customers are…

A: For the given data Perform Z test for one proportion

Q: A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older…

A: Suppose µ is the mean wake time for a population with the treatment.

Q: In an experiment, die is rolled continually until a 6 appears, at which point the experiment stops.…

A: Sample Space A sample space is a collection or a group of possible outcomes of a random experiment.…

Q: 5) What is the unemployment rate for individuals with college degrees 6) What is the probability of…

A: Here Given Probability table for variable X and Y  where  X=0, Represents do not have college degree…

Q: An important factor in solid missile fuel is the particle size distribution. Significant problems…

A: Given: It is given that the probability distribution function of particle size is: f(X) = 7X-8, 0,…

Q: A retail variety store that advertises extensively by mail circulars expects a sale with 20%…

A: Given datan=30p=20%

Q: A leading magazine (like Barron's) reported at one time that the average number of weeks an…

A: Assume that the length of unemployment is normally distributed with population mean of 25 weeks and…

Q: A study of the effect of television commercials on 12-year-old children measured their attention…

A: As per bartleby policy I answered the a to f subparts

Q: 6.30 An apple a day keeps the doctor away. A physical education teacher at a high school wanting to…

A: To find out the concentration of a population, perform a One-Sample Proportion Test. It takes into…

Q: iii) P (-0.20 ≤z≤-.50) 0.1122 O-0.1122 0.8878 O 0.5

A: Given distribution is standard normal.

Q: Suppose that in a senior college class of 500 students, it is found that 200 smoke, 233 drink…

A: Probability measure the event happening chances. Event is the all possible outcome of the…

Q: Does the Public Support Sin Taxes? A survey of 1000 adults in the US conducted in March 2011 asked…

A: From the provided information, Sample size (n) = 1000 Confidence level = 90%

Q: es ms In a test of the effectiveness of garlic for lowering cholesterol, 45 subjects were treated…

A: Given: n = 45 X = 4.4 s = 17.1 Confidence level = 95% Formula Used: Confidence interval = X ± tsn

Q: 2. The owner of a factory that sells a particular bottled fruit juice claims that the average…

A: Given: population mean(μ)=250sample size(n)=100sample mean (x¯)=248standard deviation(σ)=5

Q: Find the expected value for the random variable below. Find the expected value x P(x) 1 0.10 2 0.44…

A: X P(X) 1 0.10 2 0.44 3 0.36 8 0.10

Q: Select one: O a. Converse O b. Contrapositive Oc. Inverse O d. Biconditional

A: It is given that p= Roses are red and  q= Violets are blue  It can be seen that both statements p…

Q: The amount of coffee that people drink per day is normally distributed with a mean of 17 ounces and…

A: According to policy we answer 3 part kindly repost for remaining.

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Q: A researcher would like to know the proportion of the households that has a cable subscription. She…

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Q: QUESTION # 02 For a Laplace random variable whose PDF is given by: fx(x) Find the characteristic…

A: "Since you have asked multiple questions, we will solve the first question for you. If you want any…

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A: Given  Total no of checks = 100. Significance level=0.1 We need to find the test statistic, critical…

Q: ne of the primary reasons lationships 4. According to researchers, people stop listening to one…

A: 4) The mean is 8 and the standard deviation is 5.

Q: Shen took 9 test this year. His mean score was 69 points. How many total points did he earn for the…

A: From the provided information, Shen took 9 test this year that is n = 9 Mean score (x̄) = 69 points

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Q: Situation 9. Suppose that X has a lognormal distribution with parameters 8 = -2 and ² = 9. Determine…

A: A lognormal distribution could be a continuous probability distribution of a stochastic variable…

Q: The pulse rates of 175 randomly selected adult males vary from a low of 36 bpm to a high of 96 bpm.…

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Q: On average, 2.5 traffic accidents per month occur at a certain intersection. Complete parts (a)…

A: Given: Mean = 2.5 To use poisson distribution

Q: In preparation for the upcoming school year, teacher looks at raw test scores on the of looking at…

A: Given, mean µ = 202 standard deviation (σ) = 38.2  Let 'x' be a random variable i.e. x~Normal(µ,σ)…

Q: A service facility operates with two service lines. The random variables X and Y are the proportions…

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Q: Salaries of 44 college graduates who took a statistics course in college have a mean, x, of $69,200.…

A: Here, n=44, x=69,200, and σ=10,204. As confidence level is given as 99%, the value of α=0.01.

Q: The production manager of a large manufacturing company estimates that the mean age of his workers…

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Q: Find the specified area from a standard normal distribution. The area below: z=2.07 Round your…

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Q: Statistics 2 - Chapter 11 Project 1 Two new assembly methods are tested and the variances in…

A: Given n1=31, s12=25, n2=26, s22=12  Level of significance ɑ=0.05

Q: The time required for an automotive center to complete an oil change service on an automobile…

A: Solution Given That, The time required for an automotive centre to complete an oil change service on…

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

A: According to the given information in this question  There are more than three subparts according to…

Q: You wish to test the following claim (Ha) at a significance level of a = 0.02. Ho: P1 = P2 Ha: P1 P2…

A: From the provided information,

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Q: DO NOT ROUND OFF UNTIL YOU GET TO THE ANSWER A randomly selected sample of college basketball…

A: The following sample data is given:…

Q: If x represents a random variable with mean 131 and standard deviation 40, then the standard…

A: Given that ; u = 131  ? = 40 Sample size ( n) = 100 Here we use the concept of standard normal…

Q: Suppose a storeowner assumes that all his employees are honest; however, shortages in the cash…

A: Given: The scenario is given. Here we find the defined null and alternative hypotheses. Define Type…