For the past several years, the mean number of people in a household has been declining. A social scientist believes that in a certain large city, the mean number of people per household is less than 2.5. To investigate this, she takes a simple random sample of 150 households in the city, and finds that the sample mean number of people is 2.3 with a sample standard deviation

For the past several years, the mean number of people in a household has been declining. A social scientist believes that in a certain large city, the mean number of people per household is less than 2.5. To investigate this, she takes a simple random sample of 150 households in the city, and finds that the sample mean number of people is 2.3 with a sample standard deviation

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.4: Distributions Of Data

Problem 19PFA

See similar textbooks

Related questions

Q: Find the critical value tc for a 99% confidence level when the sample size is 23. A. 2.074…

A: Given information- Sample size n = 23 Confidence level = 0.99 So, significance level α = 0.01 We…

Q: In a program designed to help patients stop smoking, 181 patients were given sustained care, and…

A: given data clim : p = 0.79n = 181α = 0.05p^ = 0.845

Q: The joint distribution of the random variables X and Y is given in the table X Y -3 1 DY+Y</Y=1= -2…

A: Given information: Y|X -2 -1 2 -3 0.14 0.14 0.12 1 0.05 0.04 0.51

Q: The data below is 14 observations of hog heart girth (in) (x) and hog weight (lb) (y). Calculate the…

Q: A researcher is interested in whether length and vividness had an effect on how many phrases a…

Q: Are phone calls equally likely to occur any day of the week? The day of the week for each of 623…

A: Introduction: Denote pSun, pMon, pTue, pWed, pThu, pFri, and pSat as the true proportions of phone…

Q: Are freshmen psychology majors just as likely to change their major before they graduate compared to…

Q: Game Attendance An athletic director suggests the median number for the paid attendance at 18 local…

A: Given The data is as follows: 4231, 5605, 2556, 5228, 5586, 3675, 3867, 3610, 4679, 5676, 5779,…

Q: For a large supermarket chain in a particular state, a women's group claimed that female employees…

A: Given α=0.05 Test of p=0.45 vs p≠0.45 X=25N=6595% CI=0.266,0.503z-value=-1.06p-value=0.289

Q: QUESTIONS 6-10. Data in the table below were collected in a case control study of breast cancer and…

A: Status Cases Control Regular Intake of NSAIDs 200 300 No Regular Use of NSAIDs 300…

Q: Find the value of χ2 with an area to its right of 0.10 and 15 degrees of freedom. Use Table A.4…

A: Given that Level of significance =0.10 And degree of freedom =df =n-1=15

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

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

Q: competency test for high school sophomores has a normal distribution with a mean of 430 and a…

A: Given X ~ N(mean=430, standard deviation=87)

Q: survey to determine viewer response to a new television show obtained the following data. Rating…

A: General formula of probability is , Probability = Number of favorable outcomes Total outcomes

Q: Gasoline Use A random sample of 49 drivers used on average 754 gallons of gasoline per year. The…

A: The sample size is 49, sample mean is 754 and population standard deviation is 33.

Q: For any problem where you use a preprogrammed TI function, you must write down which function you…

A: Let us denote X as the ratio of the length of a person's femur follows normal distribution with mean…

Q: A single-case design in which the independent variable is introduced and removed one or more times…

A: To find: A single-case design in which the independent variable is introduced and removed one or…

Q: A set of solar batteries is used in a research satellite. The satellite can run on only one battery,…

A: The chi square (χ2) test is used to check the significant difference between the population variance…

Q: university conducted a survey of 366 undergraduate students regarding satisfaction with student…

A: Given that Number of junior students = A = 96 Number of students satisfied = B = 228 Number of…

Q: 2 Cost for standard veterinary services at a local animal hospital follows a Normal model with a…

A: Given that. X~N( μ , ?) μ=80 , ?=20 Z-score =( x - μ )/? NOTE:- According to bartleby…

Q: For a standard normal distribution, find: P(z > c) = 0.9605 Find c rounded to two decimal places.

A: Let z be the standard normal distribution with parameters (μ=0 and σ=1) The value of c is,

Q: Heart Rates For a certain group of individuals, the average heart rate is 73 beats per minute.…

Q: At a certain University, the chance of a student receiving financial aid is 87%. 15 students are…

A: Given that Number of trials n=15 Success of probability p=0.87 X~binomial (n,p)

Q: Consider a t distribution with 14 degrees of freedom. Compute P<−1.39<t1.39 . Round your answer to…

A: Given Df =14 P(−1.39<t<1.39)

Q: a) State the hypothesis in words and mathematical notation. State the alpha reflected in the STATA…

A: Given that, Dependent variable (y) = the number of hours spent emailing for work. Independent…

Q: ks. ut W (in The researcher would like to determine if these data provide convincing evidence that…

A: Test is that whether true mean amount of time volunteers who were given training held their breath…

Q: From previous studies, it is concluded that 40% of workers indicate that they are mildly satisfied…

A: GIVEN DATA,p=0.40n=500claim:p<0.40α=0.005we have to find out the given probabilities .

Q: The employment status of working students in Olongapo City is below. Is there any auference in the…

A: Given that the employment status of working students in Olongapo City.

Q: Lifetimes of Wristwatches A random sample of the lifetimes of 30 inexpensive wristwatches has a…

A: The sample size is 30 and sample standard deviation is 4.6.

Q: a)Calculate an unbiased point estimate of Pm. b) We wish to construct a 94 % classical confidence…

A: Followings are the Explanation of the question Use the Z proportion confidence interval for the…

Q: Mr. Piolo and Gerard administered their researcher made test to measure the mathematical ability of…

A: Followings are the explanation of the Question Use the Excel and calculate the sample mean and…

Q: e National Center for Education Statistics surveyed 4400 college graduates about the lengths of time…

A: given data,n=4400x¯=5.15s=1.68CI=0.99α=1-0.99=0.01n=4400

Q: A doctor in Cleveland wants to know whether the average life span for heart disease patients a…

A: In the given situation, There are 4 hospitals. hospital 1 has 35 patients, hospital 2 has 26…

Q: The implied volatility smile or skrew refers to the fact that different excerise prices within an…

A: True The implied volatility smile or skew refers to the fact that different excercise prices within…

Q: A math test uses a sample of 16 students with a mean score of 78 and another sample of 21 students…

A: Followings are the Explanation of the question Use the two sample independent t test Given that,…

Q: Is there a difference in the pretest and posttest scores of nursing students in Biostatistics?…

A: Given data of pre-test and post-test scores Pre test Post test 61 56 40 80 67 60 34 60…

Q: Below are bivariate data giving birthrate and life expectancy information for each of twelve…

A: The given data shows the birthrate and female life expectancy.

Q: These data are the number of on-campus burglaries reported in a given year for nine western…

A: Given data: Sample size = 9 To find: 1.Mean 2. Median 3.Midrange 4.Mode

Q: We want to test whether type of ice cream "container" (options: Cone or Sundae) is related to…

A: The chi-square test statistic value is 2.471.

Q: The average time to run the 5K fun run is 23 minutes and the standard deviation is 2.2 minutes. 15…

A: Solution-: Given: μ=23,σ=2.2,n=15 Let, X= The time to run the 5K fun run ∴X→ N(μ=23,σ2=2.22) We want…

Q: The Genetics and IVF Institute conducted a clinical trial of the YSORT method designed to increase…

A: Given Information: The sample size is 291 and there are 239 boy babies in the population. The level…

Q: Megan would like to test whether the average commute time is noticeably different for students at…

A: From the provided information, n1=41x1=20.9s1=3.8n2=61x2=17.5s2=4.2α=0.01

Q: Define the terms dependent and independent variable and explain their relationship.

A: We need to define the terms: Dependent Variable Independent Variable

Q: Compute a three-period moving average for these stock prices (in R, order = 3). What are the first…

A: Given Enter the given data in to excel sheet Calculate the first and second moving average

Q: Let X₁, X₂,..., X₁, be independent, uniformly distributed random variables on the interval [0, b).…

A: It is given that X1, X2, . . ., Xn follows Uniform(0, b).

Q: Refer to the Venn diagram below. How many elements are in the set AUB? U A 22 12 36 B 40

A: The following information has been provided based on the above given Venn diagram. n(A)=22+12…

Q: the 1920's about 97% of the U.S. colleges and universities required a physical education course for…

Q: 1. Consider the model Here, y = Xb+ e, X = b=b₁ 1 b₂ X is the design matrix, y the observed values…

A: Given the data as y x1 x2 1 0 1 5 0 1 4 0 2 3 1 1 2 1 1 3 1 2 4 2 1 3 2 1 10 2…

Q: d) What percent of the total variation in MBA applicant GPAS can be explained by the straight-line…

A: Given information: Applicant GPA IQ SE SEX 1 7.94 111 67 1 2 8.292 107 43 1 3 4.643 100 52…

Q: a. Develop the estimated regression equation that relates annual maintenance expense (in hundreds of…

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

Question

Household size: For the past several years, the mean number of people in a household has been declining. A social scientist believes that in a certain large city, the mean number of people per household is less than 2.5. To investigate this, she takes a simple random sample of 150 households in the city, and finds that the sample mean number of people is 2.3 with a sample standard deviation of 1.5. Can you conclude that the mean number of people per household is less than 2.5?

1.Compute the value of the test statistic. Round your answer to three decimal places.

Expert Solution