For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding. In a marketing survey, a random sample of 990 supermarket shoppers revealed that 268 always stock up on an item when they find that item at a real bargain price. (a)  Let p represent the proportion of all supermarket shoppers who always stock up on an item when they find a real bargain. Find a point estimate for p. (Enter a number. Round your answer to four decimal places.)   answer 0.2707 (b)  Find a 95% confidence interval for p. (For each answer, enter a number. Round your answers to three decimal places.) lower limit      upper limit      What is the margin of error based on a 95% confidence interval? (Enter a number. Round your answer to three decimal places.)

Q: I want to compare the percentage of people who have a college degree in California (population about…

A: (a) The researcher wants to compare the percentage of people who have a college degree in California…

Q: Find the standard error of estimate, se, for the data below, given that Y hat = -0.206x + 2.097.…

A:

Q: A random sample of medical files is used to estimate the proportion p of all people who have blood…

A: we have to find sample size required for margin of error.

Q: A random sample of medical files is used to estimate the proportion p of all people who have blood…

A: Given Information: Error (e)  = 0.07  confidence level = 99%  p = 0.5 (given)

Q: A recent study indicated that 20% of 133 women over age 55 in the study were widows.  a. How large a…

A:

Q: The teacher let the students make up some of their work, so that now 86 students are passing out of…

A: The sample proportion/point estimate of the sample of size n can be defined as: p^=xn  Here, x =…

Q: Which of the following ideas is false when calculating the estimate?

A: here basic of confidence Interval  Chevrolet's customer relations department wishes to estimate the…

Q: Calculate the median of the data shown, to two decimal places

A: Median is the value which divides tye whole data in two equal halves.

Q: A recent study indicated that 22% of the 173 women over age 55 in the study were widows. Round up…

A:

Q: During a year the ratio of the prices of commodities A and B was 5 whereas during the next year…

A:

Q: Following her hospital recovery, she decides to find out the distance she travelled during this…

A: GIVEN THE TIME AND VELOCITY  WE HAVE TO FIND LOWER ESTIMATE

Q: A student added 3/4 and 1/2 and obtained 4/6 as an answer. How would you use estimation to show the…

A: Now, the student added 34with 12 to obtain 46 as the answer. We know that, 34+12=1×3+2×14=3+24=54…

Q: To fairly divide their patients on a hospital ward, oncology nurses are going to examine their…

A: Solution: Let X be the number patients on the oncology ward and n be the number of patients admitted…

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A:

Q: In a sample of n= 6 scores, five of the scores are each above the mean by one point. Where is the…

A: The mean of a data can be obtained as follows:

Q: a. Assume that nothing is known about the percentage to be estimated.

A: Given : Margin of error, ME = 0.04 sample proportion, p̂ = 0.5…

Q: The brand manager for a brand of toothpaste must plan a campaign designed to increase brand…

A: Given information- Margin of error, E = 7% = 0.07 Confidence level, c = 80% Since nothing is known…

Q: The following data represent the monthly phone use, in minutes, of a customer enrolled in fraud…

A:

Q: b. If the study had found that 51 of the 80 students were working then: ZSTAT =| (Round your answer…

A: Given sample size, n = 80 students population proportion of working = p = 0.48 51 of the 80 students…

Q: Researchers conducted a survey among 400 doctors to ask the question; "Are you willing to treat your…

A: Given Sample size, n = 400  For a conservative case, we assume that the proportion of  patients…

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A: a) Given that the confidence level is 90%. Significance level is 0.10 From the standard normal…

Q: The results of a recent poll on the preference of teenagers regarding the types of music they listen…

A: Here is given that, two populations and two selected samples. We will use two proportion point…

Q: When estimating the true proportion, how large a sample is needed to be 95% confident that the error…

A: It is given that Margin of error E = 0.06 Level of confidence = 0.95 The critical value of Z at 95%…

Q: Step 3: Find the p-value of the point estimate. First identify the ohserved andlexpected values

A: Step 3: From the given information, Ethnicity Observed values(O) Proportion(p) Expected…

Q: Juan is a tricycle driver in Barangay Talamban. He recorded his earnings (in pesos) for the past 15…

A: Note: As per the guidelines, only 1 question can be answered. Kindly, repost with note for other…

Q: Travel to Outer Space A CBS News/New York Times poll found that 329 out of 763 randomly selected…

A:

Q: David is doing a research project in political science to determine the proportion p of voters in…

A: Let p represents the proportion of voters in David's district who favor capital punishment. A. The…

Q: A student at Tolland High School wondered if boys or girls at her school traveled a greater distance…

A: Solution : Given : n1 = 50 , n2 = 50

Q: Travel to Outer Space A CBS News/New York Times poll found that 329 out of 763 randomly selected…

A:

Q: In 1996, the average price of a commodity was 20% more than that in 1995, but 20% less than that in…

A: Solution is given in the photo:

Q: A random sample of medical files is used to estimate the proportion p of all people who have blood…

A:

Q: The lengths of pregnancies in a small rural village are normally distributed with: μ = 269 0 = 15 In…

A: Given Mean=269 Standard deviations=15 Z=99.7%

Q: d. Give a 95% interval estimate of the number of fatal accidents per 1000 licenses in a city where…

A: Solution:  Given information: n= 42  Sample size  MSE= 0.3473  Mean square  error  The degree of…

Q: A researcher wishes to estimate the proportion of adult males who are less than 5 feet 5 inches…

A: Given data,E = 45 - 0.04Ƶ -value at 90% confidence is Ƶc = 1.645

Q: The manager of an orchard expects about 82 percent of her apples to exceed the weight requirements…

A:

Q: A student at Tolland High School wondered if boys or girls at her school traveled a greater distance…

A: Given: Sample size for girls = 50 Sample size for boys = 50 The concern is to check the average…

Q: The Consumer Reports National Research Center conducted a telephone survey of 2000adults to learn…

A: We are given the results as follows: Let us denote x as the number of adults who think the future…

Q: John Kittle, an independent insurance agent, uses a five-year moving average to forecast the number…

A: Given, Claims made four years ago as 1,400 when it should have been 1,200.       to find, a. What…

Q: For a sample of 12 offenders convicted of weapons violations, the length of prison sentence in…

A: to find mean valuemean = sum of observations/ count of observationsmean = (6 + 6 + 2 + 12 + 36 + 48…

Q: Suppose that out of 10,351 convicts who escaped from U.S. prisons, only 7767 were recaptured. Let p…

A:

Q: A random sample of medical files is used to estimate the proportion p of all people who have blood…

A:

Q: Find the relative error of p = 0.71 × 10-5 if its approximate value is p* = 0.70 × 10-5, and also…

A:

Q: Suppose you want to estimate the percentage of stat students who passed the departmental final exam.…

A: Given : Total Stat students = 50

Q: The head of a computer science department is interested in estimating the proportion of students…

A: Solution: From the given information, confidence level is 0.95, p=0.35 and E=0.10.

Q: @ Briefly deuribe the difference be tween estimations and hyporhenis testing.

A: In inferential statistics, data from a sample is used to “estimate” information about the data from…

Q: Solve the problem. Round the point estiamte to the nearest throusandth.  6) Find the point estimate…

A: Let X be the people had hearing aids  n be the random sample Given X=20, n=304

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: Given, sample size (n) = 580 x  = 370 a)  Point estimate for p =  sample proportion (p^)…

Q: (a) If you have no preliminary estimate for p, how many medical files should you include in a random…

A: 1)a)Givenmargin of error(E)=0.06Confidence level=85%

Q: A sample of students is to be selected to estimate the proportion who have recieved a medical…

A: The known values are,   The sample proportion is, Critical values: By using the standard normal…

Q: Suppose that we want to estimate what proportion of gift items purchased at a department store are…

A: Given ME= 0.05 Confidence level=95℅

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.