17. From a random sample of 500 Jordanian firms, it was found that 420 Jordanian firms made a profit. The researcher calculates the confidence interval for the proportion of Jordanian firms and found it (0.86048, 0.81952 ). Find the confidence level the researcher was used?

Q: If n = 340 and p^=0.92, find the margin of error at a 90% confidence level E= Give your answer to…

A: Given,n=340p^=0.921-p^=1-0.92=0.08α=1-0.90=0.1α2=0.05Z0.05=1.645

Q: Suppose we know that a confidence interval is (-.735, .125). Find the sample mean and the error…

A: Ans- Given,     a confidence interval is (-.735, .125). Find  the sample mean and the error bound.

Q: In order to construct the 95% confidence interval, you choose which formu x ±1.96 × n x + 1.984 × x…

A:

Q: What is the margin of error if we find a 95% confidence interval for the percentage of Corvettes on…

A:

Q: A sample of 100 homes in city A and 100 homes in City B was taken to estimate the proportion of the…

A: Given that, A sample of 100 homes in city A and 100 homes in city B were taken to estimate the…

Q: In one of the studies, it was found that, in a random sample of 261 married persons, 135 were…

A:

Q: What proportion of homes for sale in Ohio are sold through a real estate agency? In a survey of a…

A: The confidence interval is 0.69 to 0.81.

Q: If n=280 and ˆpp^ (p-hat) =0.83, find the margin of error at a 99% confidence level Give your…

A: The margin of error = The margin of error (ME) expresses the maximum expected differences between…

Q: Suppose you calculate a 99% confidence interval to be: 13.05 to 20.75. Determine the margin of error

A: Given data: The given upper limit is b=20.75. The given lower limit is a=13.05.   The expression for…

Q: Find the value of ta for a 99% confidence interval when sample size is 30 2

A: Note: Since you have asked multiple question, we will solve the first question for you as per…

Q: A researcher was interested in knowing how many people in the city supported a new tax. She sampled…

A:

Q: using the confidence interval method, to test that population mean equals 14, a researcher obtains…

A: Solution: State the hypotheses. Null hypothesis: H0: µ=14. That is, the population mean is equal to…

Q: An environmentalist would like to estimate the true mean weight of all cars. To do so, she selects a…

A: We have given that,  The 90% confidence interval for true mean weight to be 2.8 to 3.4 .  Then,  We…

Q: If n=450 and ˆpp^ (p-hat) =0.48, find the margin of error at a 99% confidence level Give your…

A: Given n=450 and p^=0.48, level of significance ɑ=0.01

Q: An automotive manufacturer wants to know the proportion of new car buyers who prefer foreign cars…

A:

Q: A cable company claims that 88% of its customers are fully satisfied with their service. A…

A: Given that  Sample size n =350 Favorable cases x =287 Sample proportion p^=x/n  =287/350 =0.82

Q: If n=210 and ˆpp^ (p-hat) =0.86, find the margin of error at a 90% confidence level Give your…

A:

Q: Suppose a researcher found that M= 30.00 and SEM= 3.00. What are the limits of the 68% confidence…

A:

Q: A researcher constructed a 95 percent confidence interval for the mean number of alfalfa weevils on…

A: The 95% confidence interval for the population mean is (1.50, 3.50)

Q: 3 Based on data collected in 2010, 23% of women wanted to buy a Google Android smart phone or…

A: The experiment is conducted to test the difference in proportions between buying interests for…

Q: What proportion of college students earn their undergraduate degrees in four years? A college…

A: The formula of the margin of error when the limits given are,

Q: determine the 95% confidence interval or range in an observed score of 86 if SD is 5.8 and the…

A: 95% Confidence interval is 79.4934 and 92.5066 Explanation: Data given, r=0.82 X=86 SD=5.8 Standard…

Q: Suppose you calculate a 95% confidence interval for a proportion to to be: 0.39 to 0.78. Determine…

A: Given,   Lower bound = 0.39​ Upper bound = 0.78   Here, we use to determine the margin of error.

Q: Suppose our estimate for the mean score for the Player A group was 48 ± 5% SE (standard error). What…

A: Given: Point estimate = 48 Standard error = 5 Confidence level = 95%

Q: 1. Suppose you compute a confidence interval with a sample size of 40. What will happen to the…

A:

Q: In the estimation of the population mean, what if given that last year mean is 7.05 and SD is…

A: Confidence Interval provides a range of values for the estimated parameter.

Q: 7) The following is a 95% confidence interval of the proportion of female medical school students:…

A:

Q: 5, Randomly selected middle-aged people in both China and the United States were asked if they…

A: For China, n =1300 and x = 1170 therefore p^1 =11701300 = 0.9 For USA,  n = 150 and x =110 p^2…

Q: Suppose you survey a random sample from a large population. How large must your sample be if you…

A: According to the provided data, the margin of error is 0.06 and the confidence level is 0.98. Since,…

Q: how many students do we need to construct a 95% confidence interval for the proportion of the…

A: here given ,  margin of error  = 3% = 0.03  confidence level = 95%  n = 150  p^= 0.68

Q: Assume that you took a sample and calculated the sample mean as 100.you then calculated the lower…

A:

Q: Suppose we know that a confidence interval for a population proportion is (0.572, 0.662), with a…

A:

Q: The figure to the right shows the results of a survey in which 997 adults from Country​ A, 1022…

A: Given data For country A n = 997

Q: Suppose we are interested in finding a 95% confidence interval for the mean SAT Verbal score of…

A: Sorry, according to our guidelines we can answer only one question at a time. Kindly re-post the…

Q: If n=350 and ˆpp^ (p-hat) =0.64, find the margin of error at a 90% confidence level Give your…

A: Proportion is almost similar to the concept of probability. Proportion is a fraction of population…

Q: A 95% confidence interval is constructed in order to estimate the proportion of adults who own an…

A:

Q: a random sample of 63, the proportion of the sample with a certain characteristic was 0.61. What is…

A:

Q: If n=200 and ˆpp^ (p-hat) =0.16, find the margin of error at a 95% confidence level Give your…

A: Given Information

Q: For a group of 10 men subjected to a stress situation, the mean number of heart beats per minute was…

A:

Q: An educator wants to construct a 99% confidence interval for the proportion of elementary school…

A: The random variable is elementary school children in Michigan who are proficient in reading. It…

Q: Suppose we know that a confidence interval for a population proportion is (0.105,0.355), with a…

A: Obtain the margin of error. The margin of error is obtained below: Margin of Error: The margin of…

Q: 2. You are going to construct a 90% confidence interval for the proportion of adults that have a…

A: From the given information, let X be the number of adults that have a post-secondary education. The…

Q: Suppose you calculate a 99% confidence interval of 14.71 to 21.64. Determine the margin of error.

A: Given information- We have given a value of 99% confidence interval is- C.I = (14.71, 21.64) Lower…

Q: Suppose, upon constructing a 95% confidence interval based on your sample proportion of 0.28, you…

A: It is given that, A random sample of 125 M&M candies is selected where 28% are blue. Sample…

Q: 2. A sample of 430 business applications included 150 men. Find the 99% confidence interval of the…

A: Answer:-  Given,  X=150 n=430

Q: Suppose that based on a random sample, a 95% confidence interval for the mean hours slept (per day)…

A:

Q: Imagine that the confidence interval around a candidate's popularity score is [37.22,48.86],what is…

A: The confidence interval provides an estimated range of values that includes an unknown population…

Q: a. Suppose that a random sample of 41 state college students is asked to measure the length of their…

A: Since you have posted multiple sub-parts, we will solve the first three sub-parts for you. To get…

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.