Assume the standard deviation of the heights of all five-year-old boys is 3.5 inches. How many five-year-old boys need to be sampled if we want to be 90% sure that the population mean height is estimated correctly to within 0.5 inches? 102 325 133 81 189

Q: What the three trend lines and seasonal variation information shown in Chart and Table 1 indicate…

A: Average seasonal variation for Q1: -10%Average seasonal variation for Q2: +35%

Q: The Affordable Care Act created a market place for individuals to purchase health care plans. A…

A: Data293165233122262263157243141140176158228173275179180221163241209294110142143167174281111235256166…

Q: 7. The fuel price index (FPI) and the consumer price index (CPI) in a certain country for the years…

A: Year199619971998199920002001200220032004200520062007FPI51.723.753.855.779.289.497.6100.0106.6153.320…

Q: Let's stock return is distributed with µ = 16% per annum, o = 20% per annum S0 = 40, T = 6 month.…

A: Confidence level = 95%

Q: Nutritional researchers conducted an investigation of high fiber diets intended to reduce serum…

A: Oat:Sample size Sample mean Sample standard deviation Placebo:Sample size Sample mean Sample…

Q: Let X have cdf Fx(x) = 1- (1+x)^-A, x,a > 0. Determine the pdf and cdf of Y = CX

A: Let X have cdf Fx(x) = 1- (1+x)^-A, x,a > 0

Q: Random sampling from four normally distributed populations produced the following data: (You may…

A: GOTO EXCELDATA---->DATA ANALYSISDATA ANALYSIS---- > oNE WAY AnovaGive the four treatment…

Q: A gambler belives that he has learned to predict the color of a card befroe it is drawn from the…

A:

Q: Determine the size of the sample space that corresponds to the experiment of tossing a coin the…

A: In a coin-tossing experiment, the possible outcomes are obtained as "Head" and "Tale".

Q: a fresh deck of 52 cards and observes its color, replaces the card, and then shuffles. He repeats…

A:

Q: Use the bootstrap distributions in Figure 1 to estimate the value of information to give a 95%…

A: Bootstrap distribution is normally distributed. As the normal distribution has the mean at its…

Q: The mean starting salary for nurses is 67,694 dollars nationally. The standard deviation is…

A: Suppose the random variable x defines the starting salary for nurses.

Q: Construct a probability distribution for the given frequency distribution. (Hint: There were 288…

A: A frequency distribution table is given.

Q: Determinethe cardinality of the following, including an explanation of the process

A: we can use the provided information and apply set operations. Let's go step by step:Given…

Q: A bag contains 5 red marbles, 3 blue marbles, and 2 green marbles. If two marbles are randomly drawn…

A:

Q: Find the best predicted value of y (height) given an adult female with an arm circumference of 40cm

A: Regression equation of y on xwhere= change in y when there is a unit change in x= estimate of y when…

Q: 1. (Previous exam question) Over the past 50 years, an average of 370 minor earth tremors a day has…

A: Population mean, The data is as follows:386, 394, 362, 423, 456, 370, 385, 430, 400Confidence level,…

Q: Practice exam need to figure out how to use excel or megastat to solve   A sociologist wishes to…

A: From the given info, , , and .

Q: 5. Basic Computation: Central Limit Theorem Suppose x has a distribution with a mean of 8 and a…

A: The question is about central limit theoremGiven :Mean of a distribution Standard deviation of a…

Q: To collect data about the amount of time students spend studying for exams, which of the following…

A: It is needed to define a proper way of selecting the sample.

Q: Babies born weighing 2500 grams (about 5.5 pounds) or less are called low-birth-weight babies, and…

A: The data is defined below as follows: It is clear that,Let X denotes the birth weight for children…

Q: All athletes participating in a high school sports league are required to be tested for steroid use.…

A: The test used for steroids is 95% accurate.4% of the athletes use steroids.Total number of athletes…

Q: 2. A random sample of size 20 is taken from the binomial B(50,0.4).Find the probability tha the…

A: From the provided information,A sample of size 20 is taken from the binomial B (50, 0.4) that is n=…

Q: Use the data below for the PHONES questions that follow. Data compiled from the CIA World Factbook,…

A:

Q: An economist wants to estimate the mean per capita income (in thousands of dollars) for a major city…

A: Population mean, Population variance, Confidence level, Margin of error,

Q: According to Nielsen//NetRatings, the average visitor to the American Greetings Website spends 11.85…

A: The sample size is 20The sample mean is 11.85 minutesThe population standard deviation is 3.0…

Q: What is the correlation of X and Y

A:

Q: The mean cholesterol level of women age 45-59 in Ghana, Nigeria, and Seychelles is 5.1 mmol/l and…

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

Q: Is X-bar significantly higher than X-bar (a < .01)?

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

Q: Wenton Powersports produces dune buggies. They have three assembly lines, “Razor,” “Blazer,” and…

A: (b-1)GOTO EXCELDATA----&gt;DATA ANALYSISDATA ANALYSIS----&gt;One way AnovaGive the three treatment…

Q: Pearson correlation statistic is only valid when the relationship between the two quantitative…

A: A correlation coefficient is a measure that indicates the direction and strength of association…

Q: Question In a regression problem, what is R²? Coefficient of determination; ranges from 0 to +1.…

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

Q: Consider the situation of a mass layoff (i.e., a factory shuts down) where 1,200 people become…

A: Initial Distribution = [0 1,200]States - Employed (E) and Unemployed (U)probability of remaining…

Q: X P(x) 0 0.15 1 0.05 2 0.05 3 0.75 Find the mean of this probability distribution. Round your answer…

A: Answer Given X             P[x] 0             0.151             0.052             0.053…

Q: Raul received a score of 62 on a history test for which the class mean was 52 with standard…

A:

Q: 6. The following summary gives zinc mass (g) for two different brands of size D batteries: Brand…

A: The null hypothesis states that the true zinc mass is same for the two brands of batteries.The…

Q: A research wants to determine if pre-natal exposure to the hormones in birth control pills alters…

A: The researcher exposes a group of pregnant midshipman fish to birth control hormones and records the…

Q: When members of a philanthropic organization ter, they get their mailing list. They simulated 1000…

A:

Q: In a genetics experiment on peas, one sample of offspring contained 444 green peas and 122 yellow…

A: The no. of green peas in the experiment is .The no. of yellow peas in the experiment is .

Q: 35 per year. What is the z-value rounded to the nearest hunc evidence to reject the claim? e is…

A:

Q: Executives of a supermarket chain are interested in the amount of time that customers spend in the…

A: S = 28 E = 4 Significance level = 0.1

Q: True or false: Consider two normal curves. If the first one has a larger mean than the second one,…

A: To state whether the given statement is true or false.

Q: Create probability distribution tables for X and Y.

A: A modified deck of cards is created with two 2s, three 3s, four 4s, and five 5sTotal number of cards…

Q: Determine whether the statement shown below is true or false. If it is false, rewrite is as a true…

A: Determine whether the statement shown below is true or false. If it is false, rewrite is as a true…

Q: It is reported that Americans stayed an average of 6.5 nights when they went on vacation. A student…

A: The hypothesized average stay of Americans on vacation is stated to be .The sample observations stay…

Q: ly Sales of People Magazine         Store 1 Store 2 Store 3 Store 4 101 97 85 102 107 73 91 114 104…

A:

Q: Probability that a randomly selected employee...... A) was in the under 25 age group AND approved…

A: By using the table data, we can get the necessary information to make the calculation easy:• The…

Q: 4.- For the following data set 10,7,6, k, 4, 7, 1, 10. Find the value of k so that (a) X = 6.25 (b)…

A: we can calculate the mean (X̄), median (M), and mode (MR) of the data and substitute the missing…

Q: In the United States, males between the ages of 40 and 49 eat on average 103.1 g of fat every day…

A: For the distribution of the fat consumption (in grams) of males in the US aged between 40 and 49, it…

Q: Consider the following data. Period 1 2 3 4 5 Rate of Return (%) -6.0 -8.0 -4.0 2.0 5.4

A: Given:PeriodRate of Return (%)1-6.02-8.03-4.042.055.4Total-10.6