A survey of 82 students found that 29% were in favor of raising tuition to pave new parking lots. The standard deviation of the sample proportion is 6.6%. How large a sample (to the nearest person) would be required to reduce this standard deviation to 3.7%? Answer: 48

Q: 2. Suppose a transition diagram is given as follows: 1 2 50 3 1/2 1/4 1/2 4 6 7 1/4 1/2 For this…

A: Given the transition diagram of a Markov chain asThe recurrent classes are  and The transient class…

Q: Required information The National Assessment for Educational Progress measured the percentage of…

A: The data related to reading proficiency and graduation rate of students is given.It is needed to…

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 17 inches,…

A: The objective of this question is to find the probability that a randomly chosen item from a…

Q: The probability of winning the first prize in a lottery of a man is 15/100. If the total of 3500…

A:

Q: A tire manufacturer believes that the tread life of its snow tires can be described by a Normal…

A: Population mean=32000Population standard deviation=2500

Q: The cross-tabulation data given below show the number of people who rated a customer service…

A: The given data is as follows: Friendliness/Politeness Staff GreetingNoYesNo 126Yes1519

Q: A publisher reports that 49% of their readers own a personal computer. A marketing executive wants…

A: The objective of this question is to determine the P-value of the test statistic in a hypothesis…

Q: In a sample of 290 adults, 191 had children. Construct a 95% confidence interval for the true…

A: 0.604 < p < 0.713 Explanation:Approach to solving the question:To construct a 95% confidence…

Q: According to Thomson Financial, last year the majority of companies reporting profits had beaten…

A: a)It is given that, in a sample of 149 companies 105 beat estimates, 21 matched estimates, and 23…

Q: Assume that different groups of couples use a particular method of gender selection and each couple…

A:

Q: Situation: The Ipod Touch has been out for two years now and a lot of data has been…

A: The linear model that best fits this data is:s=T(p)=-0.31p+255 B. The squared correlation…

Q: What does this plot show about the model being analysed?

A: The residual plot shows the predicted or the fitted values on the x-axis and the residuals (the…

Q: Not apart of assignment, practice work

A: FINAL ANSWER a) Mean = 0.0095 Variance = 1.0083∗10(−5) or 0.000010089 b) P[X<0.0095]=0.5 c)…

Q: A manufacturer knows that their items have a lengths that are approximately normally distributed,…

A: The provided information is as follows:A manufacturer knows that their items have lengths that are…

Q: die is rolled. Find the probability of the given event. (a) The number showing is a 2; The…

A: A die is rolled.Sample space: S = {1, 2, 3, 4, 5, 6}

Q: A marketing expert for a pasta-making company believes that 50% of pasta lovers prefer lasagna. If…

A: A marketing expert for a pasta-making company believes that 50% of pasta lovers prefer lasagna.We…

Q: The distribution of the daily commute drives to work of a set of employees follows a normal…

A: From the provided information,

Q: You have estimated the following AR(1) model: x=0.3+0.7x+ε₁ What are E(x,) and E(x, x) given you…

A: It is required to find the expectation , and the conditional expectation given that .

Q: The following data represent the level of happiness and level of health for a random sample of…

A: The required answer:(1) Option (b)H0:Health and happiness are independent.VsH1: Health and happiness…

Q: Which of the following study designs represents a secondary research? a. Retrospective cohort study…

A: The objective of the question is to identify which of the given study designs represents a secondary…

Q: Find the mean

A:

Q: A concerned group of citizens wanted to know if the proportion of armed robberies in Texas was…

A: a) H0: p2010=p2011H1: p2010≠p2011  b) z=-3.33c) p = 0.0009d) Reject the null hypothesise) There is…

Q: A factory produces a particular electrical component. On average, the probability that a component…

A: The objective of this question is to find the probability of having at least one faulty component in…

Q: Scores on an exam were normally distributed. Ten percent of the scores were below 60.0 and 80% were…

A:

Q: 14. Claim: 7.5; α = 0.05; Sample statistics: s = σ a 8.8; n = 51.

A: Let  be the population standard deviation.Given that,Population standard deviation Sample standard…

Q: In the country of United States of Heightlandia, the height measurements of ten-year-old children…

A: The objective of this question is to find the probability of a randomly chosen child having a height…

Q: Please do not rely too much on chatgpt, because its answer may be wrong. Please consider it…

A: (a) The most likely outcome is the one where the competitors are ranked in descending order of their…

Q: Required information The time between requests to a web server is exponentially distributed with…

A: Given , The time between requests to a web server is exponentially distributed with mean , 0.400…

Q: Tensile strength tests were carried out on two different grades of wire rod resulting in the…

A: 95% confidence interval for difference between true average strengths for the two grades: (-16.741,…

Q: i need the answer quickly

A: To find the test statistic for a single sample test of means, we typically use the formula for the…

Q: What does this plot show about the model being analysed?

A: A QQ plot is used for comparing the distributions of 2 sets of numbers.

Q: David Barnes and his fiancée Valerie Shah are visiting Hawail. There are 30 guests registered for…

A: Given that total number of guests registered for orientation is 30 and the number of guests will…

Q: Consider the following information on the expected return for companies X and Y. Economy Boom…

A: Given table is : Economyprobability XYBoom0.2437%11%Neutral0.4317%25%Poor0.33-27%9%

Q: How much noisier are streets where cars travel faster? An article reports noise levels in decibels…

A: The data set of speed and noise…

Q: Assume that hybridization experiments are conducted with peas having the property that for…

A:

Q: The nutrition label for Oriental Spice Sauce states that one package of sauce has 1160 milligrams of…

A: The confidence level in statistics refers to the probability that a statistical estimation, such as…

Q: In 2011, a U.S. Census report determined that 71% of college students work. A researcher thinks this…

A: a)The hypothesized proportion is 0.71.

Q: A researcher claims that a post-lunch nap decreases the amount of time it takes males to sprint 20…

A: The question is about hypothesis testing.Given :No. of males selected ( n ) = 10 MaleSprint time…

Q: A research study was conducted about gender differences in "sexting." The researcher believed that…

A: From the provided information,

Q: The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget…

A: Given,Mean, μ = 62 ounces.Standard deviation, σ = 9 ounces.The distribution of widget weights is…

Q: If random variable X is such that E[(X-1)]=10, E[(X-2)] = 6, what is σ'

A:

Q: A study was conducted on students from a particular high school over the last 8 years. The following…

A: The objective of this question is to find the actual SAT score for a student who is at the 22nd…

Q: The owner of Showtime Movie Theaters, Inc., would like to predict weekly gross revenue as a function…

A: The predicted value of Gross revenue for given values of X1 and X2 is 94385 $. The answer already is…

Q: What is the probability that the height of a randomly chosen child is between 52.95 and 54.55…

A: Mean:μ=54.5Standard deviation:σ=1.3

Q: 4. (20%) Customers arrive at a service facility according to a Poisson process of rate A=2…

A: a) E(X(4)X(5)|X(1) = 3) = E(X(4)|X(1) = 3) * E(X(5)|X(1) = 3) = 9 * 11 = 99b) E(X(1) + X(3) | X(2) =…

Q: The city of Raleigh has 9900 registered voters. There are two candidates for city council in an…

A: The objective of this question is to find the sample statistic for the proportion of voters surveyed…

Q: A student at a four-year college claims that mean enrollment at four-year colleges is higher than at…

A: From the given data ,5466  ,  = 50688191  ,  477735      ,   35Significance level , 0.10

Q: From the followingrandom sample of values,( 52,11,57,30,46,23,52,48,61,45,32) a) Identify the mode…

A: The first part of the question asks us to identify the mode type and its value from the given data…

Q: 8. In a science class, the grades of a test and gender are summarized below. If one student is…

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

Q: the food marketing insititute reports that 28% of households spend less than $100 per week on…

A: the probability that less than 102 households spend less than $100 per week on groceries is…