Seventy-three percent of a sample of 1000 students drive a used car as opposed to a new car or no car at all. a) Find an 80 percent confidence interval for the percentage of students who drive a used car. b) What sample size would cut this margin of error in half?

Q: e among UMP students and their education background Diploma program). A random sample of 75 UMP…

A: Sample size=75 Ratio=pass; fail =2:1

Q: The following are ages of 20 of the signers of the Declaration of Independence. 38, 40, 32, 45, 39,…

A: Given data is38,40,32,45,39,52,42,35,50,50,50,34,42,48,27,46,43,34,27,46sample size(n)=20

Q: A recent study of 25 students showed that they spend an average of $18.53 for gas per week. The…

A: Given: Sample size n = 25 Sample mean X = 18.53 Sample standard deviation s = 3

Q: were as follows: Create the frequency table, knowing that the first category is 10-14. Find the…

A: It is given that the annual rainfall was measured in the Western desert during a period of one year.…

Q: A property of ...........data is that the differences between categories are not meaningful and,…

A: Given a statement related to measurement of a data to have to fill the blank with correct option.

Q: Hlows 2.5 68.3 62. -0.9 69.2 69 plot for the sonable to assi or performing re satified. 65 30

A: a) It is assumed that the time to maze run is equally distributed from boxplot output. There is a…

Q: You must estimate the mean temperature (in degrees Fahrenheit) with the following sample…

A: Given that data  Sample size n =12 80% confidence interval.

Q: (b) Use the given probability information to set up a hypothetical 1,000 table with columns…

A: From the given information, P(D)=0.168, P(T)=0.394 and P(D∩T)=0.076.

Q: Below is the data on the time (in minutes) it takes several customers to wait in line before being…

A: Given data set is 3.2 3.3 3.5 3.9 4.1 4.4 4.7 4.8 5.2 5.6 5.6 5.7 5.8 6.0 6.2 6.3 6.4 6.5 6.7…

Q: Evaluate the following formula for x₁ = 27.9785, x₂ =25.5651, H₁-H₂ = 0, sp = 43.29, n₁ = 41, and n₂…

A: Givenx1=27.9785x2=25.5651sp=43.29n1=41n2=43μ1-μ2=0

Q: A(n) is a category in a frequency distribution. O a polygon O b. histogram O c class Od. ogive

A: We have to fill a sentence related to frequency distribution using the given options.

Q: Write the equation of the straight line

A: Algebraically, a linear equation typically takes the form y = mx + b, where m and b are constants, x…

Q: a. Mathematically express the CLRM assumption that is potentially violated if we omit a relevant…

A:

Q: A telegraphic communications system transmits the signals dot and dash. Assume that the statistical…

A:

Q: The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 264.7…

A: a) Obtain the approximate percentage of women with platelet counts within 2 standard deviations of…

Q: According to Chebyshev's theorem, at least ____________of the home buyers' ages lie between 26 years…

A:

Q: B: Which of the following values cannot be probabilities of events and why? 4 4 0.87,-0.95,0.0,- 3…

A: Solution-: (B) Which of the following values cannot be probabilities of events and why?…

Q: What is a critical value for a 2 sided z-test with a significance level of 10%? 1.65 2.33 2.58 1.28…

A: The objective is to determine the critical value for a two-sided z-test at significance level of…

Q: After the birth of their first child Maria, the Madrigals plan to set up an account to pay for her…

A:

Q: A two-tailed hypothesis test has 2 critical numbers. True False

A: Given that  Hypothesis is two tailed test.

Q: the Western Desert during a period of one year, and the readings in millimeters were as follows:…

A: It is given that the annual was measured in the Western desert during a period of one year. The…

Q: The average age of college presidents is 56 years, with a standard deviation of 4 years. Assuming…

A: Suppose a random variable X has mean µ and standard deviation σ. Therefore, the z-score of that…

Q: A scientist has read that the mean birth weight of babies born at full term is 7.2 pounds. The…

A: The claim is that the mean birth weight of babies born at full term, μ, is greater than 7.2 pounds.

Q: The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 264.7…

A: a) Obtain the approximate percentage of women with platelet counts within 2 standard deviations of…

Q: You have data drawn from a normal distribution with a known variance of 16. You set up the following…

A:

Q: ing that every 18-ounce bag of their Chips Ahoy cookies contained at I . Dedicated statistics…

A: Given From excel data Mean=1238.39

Q: The mean SAT score in mathematics is 575. The standard deviation of these scores is 37. A special…

A: Given,sample size(n)=150population standard deviation(σ)=37population mean(μ)=575sample…

Q: Q1/ A- Represent the following data in a graph using the bar graph method. temperature [ today] 27…

A: Given data: Today Temperature Saturday 27 Sunday 29 Monday 29 Tuesday 30 Wednesday 28…

Q: Quastion4: 4-a Let X₁. Xn be a random sample from a population with pdf Let X₁, X₂,..., Xn be a…

A:

Q: Lunch break: In a recent survey of 646 working Americans ages 25-34, the average weekly amount spent…

A: Given,mean(μ)=$45.67standard deviation(σ)=$2.88

Q: To test whether the mean time needed to mix a batch of material is the same for machines produced by…

A: Anova is used to measure the mean significance between more than three groups. It is a type of…

Q: of th

A: Given as,

Q: 2. What types of graphs you can draw for a Qualitative (Categorical) variable? 3. What types of…

A: 2. The qualitative data is the descriptive and conceptual findings collected through questionnaires,…

Q: An experiment was conducted to compare two methods (namely slide method and digital method) used by…

A: As per the requirement , solving subpart(iii)  The objective is to test the time taken by the…

Q: ormal population has mean μ-39 and standard deviation o=16. Find the values that separate the middle…

A:

Q: A decade-old study found that the proportion, p , of high school seniors who believed that "getting…

A: Givenx=198n=230p^=xn=198230≅0.8609significance level(α)=0.05

Q: Check here for instructional material to complete this problem. Evaluate E Z P1-91 P₂.92 n₁ n₂ + for…

A:

Q: Here is a bivariate data set. X y 70 39 60 5 69 59 75 47 68 -10 86 82 7850 69 44 ind the correlation…

A: Here is a bivariate data set.

Q: quickly

A: Step1: Insert the data in excel Step2: Select last two columns Step3: Go to insert Step4: Go the…

Q: Q2: A: An incomplete frequency distributions is given as: given that the total frequency is 229 and…

A: Given: The total frequency is 229 and median is 46

Q: Use the TI-84 Plus calculator to find the z-scores that bound the middle 82% of the area under the…

A:

Q: Dianne has a choice of two routes to drive to work. She timed her journey along each route on…

A: From the provided information (i) For Town route:  x x2 15 225 16 256 20 400 28 784 21…

Q: Data is drawn from a binomial (5, 0) distribution, where is unknown. Here is the table of…

A:

Q: how many samples out of 100 would you expect to not include the true population mean within their…

A: here given ,  confidence level =  90%  sample size  = 100

Q: Listed below are the top 10 annual salaries (in millions of dollars) of TV personalities. Find the…

A: The following data has been given: 42 41 39 31 20 19 16 12 11.7 10.6

Q: The Journal de Botanique reported that the mean height of Begonias grown while being treated with a…

A:

Q: (1) P(T) 0.306 (ii) P(TC) 0.694 (iii) P(CIT) 0.391 (iv) P(LIT) 0.285 Complete the following…

A: Given: PT=0.306 PTc=0.694 PC|T=0.391 PL|T=0.285

Q: In a pharmaceutical company, the height measurements of lab benches are approximately normally…

A: Given problem is normal distribution Let X: Height measurement of lab benches Mean=μ=53.3 Standard…

Q: Using the data given below, test the utility of the sample regression model using a = 0.01, Analyze…

A: Solution Given Consider Pressure= x Ratio= y

Q: Find the MLE of and compute

A: