What is the smallest sample size that guarantees that the margin of error is less than 15 when constructing a 95% confidence interval for a population mean with the assumed population standard deviation of 509.72? (Round UP to the nearest integer)

Q: 57. An economist is interested in studying the incomes of consumers in a country. The population…

A: The population standard deviation is known to be $1,000.A random sample of 50 individuals.A mean…

Q: The graph illustrates a normal distribution for the prices paid for a particular model mean price…

A: The population mean = 1400The population standard deviation =115

Q: According to a Time Magazine/ABT SRBI poll conducted by telephone during October 9-10, 2011, 73% of…

A: It is given that the percentage of adults age 18 years and older said that they are in favor of…

Q: antidepressant drug or a placebo for six weeks. Of the 324 patients who received the antidepressant…

A:

Q: The E, expected count for the five categories, i = 1, 2, 3, 4, 5, is the same as E₁ = 60. The O,…

A: Categoryobserved countExpected count1496026560376604496056160The test statistics involves finding…

Q: Suppose the distributions of arrival and service times were normal instead of exponential.  Let the…

A: The objective of this question is to estimate the long-run average number of people that would be in…

Q: A housing survey was conducted to determine the price of a typical home in Topanga, CA. The mean…

A: The objective of this question is to find the probability that the mean price of 60 randomly chosen…

Q: If n=18, (x-bar)=35, and s-11, construct a confidence interval at a 80% confidence level. Assume the…

A: The sample size is .The sample mean is .The sample standard deviation is The confidence level is…

Q: Days before a presidential election, an article based on a nationwide random sample of registered…

A: “Since you have posted multiple questions, we will provide the solution only to the first question…

Q: For the past two years, a department store has carried a new type of electronic calculator. Sales of…

A: MonthYear 1Year…

Q: d) Construct a 99% confidence interval for the mean difference in the number of runs scored by…

A: The provided information is as follows:The data set of the League A park ( with DH) and the League B…

Q: Information errors found while processing patient records fall into two categories- major, and…

A: Let X: Major error, Y: Minor error, and D be the number of demerits in the sample.The following data…

Q: Estimated Sales Volume = 46.22 +0.45(Advertising Expenditures If the company has a target sales…

A: It is given that Estimated Sales Volume = 46.22 + 0.45(Advertising Expenditures)

Q: ompute the following for a 0.1 and df The right critical value: Xa/2 30: a/2= (Round the answer to 3…

A: Answer Given Level of significance = 0.10degree of freedom = 30

Q: Suit Sales The number of suits sold per day at a retail store is shown in the table, with the…

A: Number of suits  sold per day at a retail store is given below:Number of suits sold…

Q: In a survey, 43% of the respondents stated that they talk to their pets on the telephone. A…

A: The question is about hypothesis testing.Given :Population proportion of respondents who talk to…

Q: If the Root-Mean-Square deviation is equals to zero, then every measurement of x will also give the…

A: The Root-Mean-Square (RMS) deviation is defined as follows:RMS=(xi−x¯)2nwhere n is the number of…

Q: An electrical firm manufactures light bulbs that have a length of life that is approximately…

A: Let X be the length of a light bulb.Given,

Q: sing the Chi-square test. Test the null hypothesis that men and woman do not diff in their beverage…

A: The number of rows = 2The number of columns = 3

Q: A manager wishes to see if the time (in minutes) it takes for their workers to complete a certain…

A: From the provided information,Sample size (n) = 8The difference table is as follow:d = Before -…

Q: We want to conduct the hypothesis test Ho: Attachment pattern and child care time are independent,…

A: It is of required to obtain the row and column totals of the observed counts, find the expected…

Q: Please indicate the units of analysis for each of the following questions: What is your occupation?…

A: The objective of the question is to identify the units of analysis for each of the given questions.…

Q: Using the histogram, estimate the modal monthly fuel expenditure of the 20 households who were…

A: Given,the average monthly expenditure - 3000, 1500, 2000, 2500, 1800, 1100, 3900, 2300, 2100, 1600,…

Q: The secretary of an association of professional landscape gardeners claims that the average cost of…

A: From the provided information,

Q: 5) UiA sample of 148 college students at a large university reports getting an average of 6.85 hours…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: A researcher studies water clarity at the same location in a lake on the same dates during the…

A: ObservationInitial depthDepth five years later137.244247.146.6355.559.9449.351.4567.373.5668.170.2

Q: Find the boundaries for the middle proport μ = 500, o = 100 Make sure to enter your answer like…

A: Given data

Q: the distribution of heart rates for women ages 20-39 is approximately normal with a mean of 73 beats…

A: The mean is 73 and the standard deviation is 15.9.

Q: The following table shows retail sales in drug stores in billions of dollars in the U.S. for years…

A: The linear model for the data is .

Q: (c) Suppose five observations are made independently on reaction time, each one for a temperature of…

A: The regression equation is: Population standard deviation is

Q: 3) Suppose you wish to perform model selection in multiple regression, but your statistical program…

A: Given that,We wish to perform model selection in multiple regression, but your statistical program…

Q: 4. Let X have the pdf f(x) = for some ß> 0 and x € (0,0). (a) Verify that f(x) is a pdf. (b) Find…

A: The random variable  has PDF is given as follows:

Q: The five categories are equally likely to occur, and the category counts are shown in the table.…

A: The observed counts of five categories are given.CategoryObserved Count149265376449561

Q: Sarah is the office manager for a group of financial advisors who provide financial services for…

A: Let x be the number of presentations and y be the number of new clients.

Q: What percent of a standard Normal model is found in each region? Draw a picture first a) z>0.55…

A:

Q: 1. Consider the linear regression models. The p-values are shown in parentheses [5 points). Model 1…

A: Given the 3 models with R2 values and p-values of its coefficient.want to comment on which model…

Q: C2. Let X be a random variable. (a) Let YaX be another random variable. What is EY, in terms of μ =…

A:

Q: ********** A response can fall into one of k= 4 categories with hypothesized cell probabilities…

A: Given,

Q: Show work to earn full points. Round the answers to three decimal places. Based on a random sample…

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

Q: Consider the following computer output from a multiple regression analysis relating the price of a…

A: Multiple regression analysis is a  technique that helps to analyze the relationship between two or…

Q: Currently patrons at the library speak at an average of 70 decibels. Will this average decline after…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: A machine produces metal pieces that are cylindrical in shape. A sample of pieces is taken, and the…

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

Q: (a) Why is the sampling distribution of x approximately normal? OA. The sampling distribution is…

A: Answer Given,The sample size [n] = 60

Q: One hundred people were surveyed, and one question pertained to their educational background. The…

A: The total number of observations is 100. The results of the question and their genders are shown…

Q: Cable TV choices: A telecommunications company provided its cable TV subscribers with free access to…

A: sample size(n)=404x=35significance level()=0.10sample proportion()=

Q: using the discrete RV X whose CDF is given below, B = x*0.53, mathematically describe the PMF of (B)…

A: It is given that .The probability shows how likely an event occurs.

Q: In  2013 , a consulting company asked  1019  U.S. adults whether they believed that people should…

A: Answer Favorable cases [x] = 428The sample size [n] = 1019More than 39%This is a right-tailed test.

Q: The distribution of pH measurements at a particular site is strongly skewed with mean 6.4 and…

A: Mean()=6.4standard deviation()=0.1

Q: Use the t-distribution and the sample results to complete the test of the hypotheses. Use a 5 %…

A: From the provided information,

Q: Suppose that you calculated the sample size needed to estimate a population proportion within a…

A: Given that,We have calculated the sample size needed to estimate a population proportion within a…