a.nothing ×Attendance(Round to three decimal places as needed.)b.A.B.C.D. What is the regression model?Wedding Cost= Interpret all key regression results, hypothesis tests, and confidence intervals in the regression output from part a.Interpret the slope of the regression equation. Choose the correct answer below.It is not appropriate to interpret the slope because it is outside the range of observed attendances.The slope indicates that for each increase of 1 in wedding cost, the predicted attendance is estimated to increase by a value equal to b1.The slope indicates that for each increase of 1 in attendance, the predicted wedding cost is estimated to increase by a value equal to b1.It is not appropriate to interpret the slope because it is outside the range of observed wedding costs.Interpret the Y-intercept of the regression equation. Choose the correct answer below.
Identify the sampling designs you to select computer circuits produced by manufacture to estimate the lifespan of the circuit. Give a complete Justification of your answer and any sources of bias that are clearly present based on the sampling design, using relevant vocabulary. Provide your answers in complete sentences which of these would provide representative samples from the population? For all parts of #1 a-d.a) Each circuit is produced with an associated serial number, 49 zero numbers are selected at random and the lifespan of these circuits is tested.b) There are 20 manufacturing lines at the factory. Circuits produced by the manufacturing line nearest to the lifespan testing facility are numbered in the order that they are produced in, one of the first 20 circuit is randomly selected, and then it in every 13th circuit after that is elected to have its lifespan tested.c) Every day at 4 PM with a manufacturing lines hold, five boxes of circuits for shipment are selected at random. Each box has 20 circuits, and all 20 have their lifespan tested as well. However, if a box that is select it is already place on the loading truck by 4 PM 20 have their lifespan tested as well. However, if a box that is select it is already place on the loading truck by 4 PM (loading begins at 3:30 PM, starting with the boxes that have been packed earlier in the day), another box which is not on the loading truck is selected.d) Every manufacturing cycle every manufacturing cycle (there are five per day), three of the 20 manufacturing lines are randomly selected, and 10 circuits are produced during that cycle are randomly selected to have the lifespans tested.
The SAT Math test has a mean score of 520 and a standard deviation of 110. The distribution of scores is bell-shaped. According to the Empirical Rule, approximately 95% of the scores are between what two values?Group of answer choices300 and 740520 and 630190 and 850410 and 630
Religion and Theology Assignment Writing ServiceAssume that you are designing a database to store student profiles. Your system requires students to make a username of length 10. The username should be composed of uppercase letters (A-Z) and digits (0-9), with at least three digits and at least four letters. How many possible usernames are there if a username cannot contain repeated numbers or letters?
The following are the annual salaries of 20 chief executive officers of major companies. (The salaries are written in thousands of dollars.)743, 767, 542, 248, 315, 609, 519, 633, 452, 814, 428, 338, 495, 224, 723, 204, 653, 790, 586, 84Send datato ExcelFind 25th and 90th percentiles for these salaries.(If necessary, consult a list of formulas.)(a) The 25th percentile:thousanddollars(b) The 90th percentile:thousanddollars
Each person in a simple random sample of 1,200 received a survey, and 325 people returned their survey. How could
Each person in a simple random sample of 1,200 received a survey, and 325 people returned their survey. How could nonresponse cause the results of the survey to be biased?Those who did not respond reduced the sample size, and small samples have more bias than large samples.Those who did not respond may differ in some important way from those who did respond.Those who did not respond caused a violation of the assumption of independence.Those who did not respond are indistinguishable from those who did not receive the survey.Those who did not respond represent a stratum, changing the random sample into a stratified random sample.
an automobile insurance company divides customers into three categories good risks, medium ricks, and poor ricks. Assume that of a total of 11,877 customers, 6,993 are good risks, 1,448 are medium risks, and the rest are poor risks. As part of an audit, one customer is chosen at random. What is the probability that the customer is not a poor risk? Write only a number as your answer. round to two decimal places. Do not write a percentage.
The spinning dancer (or silhouette illusion) is a moving image of a woman that appears to be spinning. Some people see her spinning clockwise and some see her spinning counterclockwise. A student showed other students this and found that 30 out of 50 (or 60%) of them saw her spinning clockwise. The student researcher was interested in the proportion of people that would see the dancer spinning clockwise. He created the following null distribution for this:(a) Using the information provided above, determine a 2SD 95% confidence interval for the population proportion of people that would see the woman spinning clockwise. (Give all answers to 2 decimal places.) there is two blanks for answers it is blank to blank (b) Based on your confidence interval from part (a) do you have strong evidence that the population proportion of people that will see the woman spinning clockwise is greater than 50%?Answer Choices:No, because the confidence interval contains 0.50No, because the confidence interval is entirely above 0.50Yes, because part of the confidence interval is above 0.50Yes, because the confidence interval contains 0.50