What is the probability that 8 out of 12 customers will see dramatic results? What is the probability that at least 8 customers will see these dramatic results? Does the company's claim appear to hold true if only 8 customers out of 12 experience a dramatic decrease in fine lines and wrinkles?

Q: Government agencies keep data about the income distribution of the population. The Garcia family and…

A: a) The kth percentile implies the value, below which k of the total observations lie.

Q: In a survey, 18 people were asked how much they spent on their child's last birthday gift. The…

A: Given data in a survey 18 people were asked how much they spent on their child's last birthday gift.…

Q: The random-generator on calculators randomly generates a number between 0 and 1. The random variable…

A:

Q: A large number of examples on Testing of Null hypothesis for large and small samples are given below…

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Q: Suppose you just graduated with an accounting degree and are trying to choose an accounting firm to…

A: Given,

Q: 2.I am going to compare the three bread making methods in terms of the density of t bread. Five…

A: Given:Here we have,Total number of observations=N=15Number of treatment=t=3 waysLevel of…

Q: Assume that thermometer readings are normally distributed with a mean of 0°C and a standard…

A: The standard normal variable is z, which follows the normal distribution with the mean of 0 and…

Q: Example. Suppose the joint density of (X,Y) is Find the marginal pdf of X and Y. f(x,y) =…

A: It is given that the joint probability density function of X and Y is, f(x,y) = e-(x+y),…

Q: Pearson correlation is an example of a nonlinear correlation true or false

A: We have given that,  Pearson correlation is an example of a nonlinear correlation true or false?

Q: The average score for games played in the NFL is 22 and the standard deviation is 9.3 points. 18…

A: If  X~N(μ , σ )  Then ,  x¯ ~Nμ, σn an ∑x ~N(nμ , σn )

Q: suppose the heigh of population of basket ball player at a certain collage are noramlly distributed…

A: Given : Sample size (n) = 16 Sample mean (X¯) = 6.2 Confidence level = 90% So , level of…

Q: 63. According to the Internal Revenue Service, the average length of time for an individual to…

A: Disclaimer: Since you have posted a question with multiple sub-parts, we will solve the first three…

Q: Which class has the greatest frequency? The class with the greatest frequency is from to Which class…

A: here use given data and create grouped frequency table  here no of class  = 5

Q: The following table shows the time a student spends studying for a test in hours and the grade they…

A: Given, Study Grade 2 84 4.5 91 5 92 3 89 4.25 88 4 93 1 68 2 76 5 94 2.5 87

Q: Suppose that the amount of time that students spend studying in the library in one sitting is…

A: "Since you have posted a question with multiple sub-parts, we will solve the first three subparts…

Q: Do students in fraternities and sororities do better or worse than other students academically? A…

A: Here we want to find lower end confidence interval.

Q: 5. Suppose you want to select 1000 New Yorkers. Given the population of each borough, what sampling…

A: Solution: Here, it is needed to identify the sampling technique one could use to draw the sample in…

Q: the value of (E(P1q0) equals.

A:

Q: out the respective averages and standard deviations, and he only remembers the latter, 0.7 and 0.86…

A: Faculty A B Population Parameters Mean 0.7 Standard Deviation 0.86 Null Hypothesis:…

Q: a. Considering a success in a given case to be "a cure," formulate the process of observing which…

A: here given ,  Pinworm infestation, commonly found in children, can be treated with a drug that is…

Q: A physical exercise has a mean length of 20 minutes with a standard deviation of 5 minutes. A gym…

A: Obtain the sample size needed. The sample size needed is obtained below as follows : Procedure for…

Q: Pay your bills: In a large sample of customer accounts, a utility company determined that the…

A:

Q: designe 0.025 cm. A random sa standard deviation of 0. at 5% level is 2.262.

A: Since, the question to be answered is not specified, we'll be answering the first complete question.…

Q: If you decided to use a one-tailed test and failed to reject the nul hypothesis, but found that the…

A: One-tailed test: It is a test used in testing of hypothesis. It indicates the chances of effect in…

Q: Give the frequencny function f(x, 0) = 1/0, 0≤x≤0 and 0 elsewhere, if you are testing the hypothesis…

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Q: The lengths and weights of a zoo's pygmy shrews were recorded during their annual health chec Length…

A: Obtain the value of the spearman’s rank correlation coefficient. The value of the spearman’s rank…

Q: A correlation of r = – 0.95 is stronger than r = + 0.70.

A: Given that  correlation r=-0.95 and r=0.70

Q: C Use the given information to find the number of degrees of freedom, the critical values x and x,…

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Q: The following equation describes the median housing price in a community in terms of amount of…

A: The given model is : log(price)=β0+β1log(nox)+β2rooms+μ where nox is for nitrous oxide rooms…

Q: The mass center G of the 1305-kg rear-engine car is located as shown in the figure. Determine the…

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Q: A college would like to estimate the proportion of its students that work full-time while going to…

A: A college would like to estimate the proportion of its students that work full-time while going to…

Q: Find the probability that an investor makes a profit on 6 of her next 12 investments, assuming…

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Q: A marketing firm is considering making up to three new hires. Given its specific needs, the…

A: The following information has been given: Let X be a random variable represents the number of…

Q: Report mode and median accurate to one decimal place. Report the mean accurate to two decimal places…

A: From the provided information is  Data  Frequency (f) Mid-value (x) f*x f*x2 60-64 2 62 124 2…

Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…

A: It is given that  Sample mean = 70.9 Sample standard deviation = 5.4 Sample size = 28 Confidence…

Q: what are the null and alternative hypotheses?  B) determine the test statistic __( round to two…

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Q: Question 1 Do students in fraternities and sororities do better or worse than other students…

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Q: The percent of fat calories that a person in America consumes each day is normally distributed with…

A: The z-score is known as the standardized score.

Q: The lengths and weights of a zoo's pygmy shrews were recorded during their annual Length (mm) 95 81…

A: The given data is x y 95 5.4 83 4.5 91 5 82 1.1 75 3.7 62 2.6 79 4.5 63 3.1 81…

Q: Favorite Season Display the data to the right in a Pareto chart. Describe the difference in how the…

A: Solution: a. Since pareto chart shows season from highest to lowest frequency:

Q: The highway mileage (mpg) for a sample of 8 different models of a car company can be found below.…

A: The following data has been provided: 18,20,23,26,35,30,33,35 The sample size is n=8. We need to…

Q: courseld=17388460&OpenVellumHMAC=91a79942 Part5 A study finds that the carapace length of an adult…

A: The mean is 14.27 and the standard deviation is 1.25.

Q: d. Find the z-scores that correspond to the percentage of adult spiders that have carapace lengths…

A: It is given that the mean is 14.27 and the standard deviation is 1.25.

Q: The lengths and weights of a zoo's pygmy shrews were recorded during their annual health check.…

A:

Q: 2. Use Slovin's Formula to compute for the value of n (number of samples) needed if the percentage…

A: Sample is taken from the population. It represent any fraction of the population. The technique used…

Q: A continuous random variable X, with mean unity, has probability density function fx (x) given by…

A:

Q: The Okeechobee County Health Department needs to estimate the proportion of county residents with…

A: Solution-: Given: x=517, n=1722 We want to find, (a) The point estimate of proportion p^ (b) Sample…

Q: Researchers are trying to examine the effectiveness of a diabetes treatment. They have three…

A: Researchers are trying to examine the effectiveness of a diabetes treatment. They have three…

Q: An ACT composite score of 32 is at the ________th percentile. ________% of the scores are lower than…

A: here use basic of Normal distribution

Q: Determine the confidence interval of the following: Given the information: the sampled population…

A: