A study was conducted in Mandaluyong to determine the proportion of fiber subscribers. From a random sample of 625 homes, 350 are subscribers. Express all proportions in decimal form. If we let x be the number of fiber subscribers in the sample, what is the value of p¯(sample proportion)? Express your answer in two decimal places. Using a 90% confidence level, find the margin of error (two decimal places) for the interval estimate. Formula: E=zα/2 [√p¯(1−p¯) / n] Confidence Level 1−α Significance Level α α/2 zα/2 90% = 0.90 0.10 0.05 1.645 95% = 0.95 0.05 0.025 1.96 98% = 0.98 0.02 0.01 2.33 99% = 0.99 0.01 0.005 2.576                    What is the lower limit(two decimal places) of the 90% confidence interval?

Q: In a trial of 185 patients who received 10-mg doses of a drug daily, 48 reported headache as a side…

A: We have given that,  Favorable cases (X) = 48 and sample size (n) =185 Then,  We will find sample…

Q: A random sample of 5000 people was conducted to determine whether the proportion of Indiana…

A: The question is about hypo. testing Given : Popl. prop. of residents who own an "iph" ( p ) = 57 % =…

Q: Calculate the standard score of the given x value, x=41.3x=41.3, where x‾=41.4x‾=41.4, s=6.8s=6.8.…

A: Givenx=41.3Mean(x)=41.4standard deviation(s)=6.8

Q: f. A random sample of n=80 observations from a quantitative population produced X = 30.2 and s2 =…

A: Given X-bar=30.2 n=80

Q: Weatherwise is a magazine published by the American Meteorological Society. One issue gives a rating…

A:

Q: You have seen that the larger the sample size, the smaller the sampling error tends to be in…

A:

Q: Suppose the relationship between Y and X is given by: Y = 3.1415 + 6X + error By how much…

A: X and Y are two random variables such that Z=X+Y, then the relation of expectation of Z with…

Q: feels that the commute in his city is less and wants to publicize this. He randomly selects 25…

A: The hypotheses are given as follows: Null hypothesis: µ=25.4. Alternative hypothesis: µ<25.4.…

Q: For a population with u = 30 and a = 4. Find the z-score that corresponds to an X value of 34.

A: From the provided information, Mean (µ) = 30 Standard deviation (σ) = 4 X~N (30, 4)

Q: A random sample of 5000 people was conducted to determine whether the proportion of Indiana…

A: sample size(n)=5000x=2773sample proportion()=population proportion(p)=0.57

Q: n=550 x=440 90% confidence

A: Given that,  n=550 x=440  The sample proportion is, Critical values: By using the standard normal…

Q: the margin of error in estimating the population mean, μ. A sample of 76 college students yields a…

A: As the population standard deviation is known, we will use the z test. The value of z at 95%…

Q: Determine the margin of error in estimating the population mean,  μ . A sample of  90  college…

A: given data  n = 90σ = 888x¯ = 322992% ci, E = ?

Q: Find the sample size required for a margin of error of 3.4 percentage points, and then find one for…

A: Given information: Given that the margin of errors are m1 = 3.4% and m2 = 1.7%. The shortcut formula…

Q: y= is the subjects gpa X= time spent reading the newspaper  Prediction Equation: y(hat)…

A: The value of R2 is given as 0.003.

Q: Given A = 13.2 and B = 3.56, which both are corrected to 3 significant figures. Find the range of…

A: Given Information:     A=13.2B=3.56 Consider the given function:    6A-B3+8

Q: Find the value of the test statistic. Round to 3 decimal places. • Claim: The mean top roller…

A: Denote μ as the true mean speed of top roller coaster.

Q: Jennifer wants to estimate the percentage of parents that use cloth diapers. She asks a randomly…

A: Solution: It is given that Jennifer wants to estimate the percentage of parents that use cloth…

Q: find out the margin of error for   for given data  [ 4 decimal places ] s=25.35 xbar - 231 n=96…

A:

Q: The mean GPA for 138 residents of the local apartment complex is 1.9. What is the best point…

A: Solution: From the given information, the mean GPA for 138 residents of the local apartment complex…

Q: A sample of 120 low-income individuals and a sample of 230 high-income individuals were surveyed…

A: Let:Population 1 = low-income individualsPopulation 2 = high-income individuals Formula for test…

Q: You sampled 20 students in a high school to try to predict the students' GPAs in 9th grade based on…

A:

Q: Given the u = 38.27 and o = 3.56, compute the z- score that corresponds to the given score X =…

A: Given that :  u = 38.27 Standard deviation = 3.56 X = 35.52 By using standard normal distribution  Z…

Q: calculate the standard score of the given x value x=36.5 where u= 36.5 and a=36.7

A:

Q: Using the data attached, compute the following  1.  x-bar= 2. Sx= 3. n=

A:

Q: In an outbreak of typhoid fever among attendees of an acquaintance party, 99 persons ate spaghetti,…

A: Given that:  n1=99  x1=30 n2=63 x2=20

Q: Heights (cm) and weights (kg) are measured for 100 randomly selected adult males, and range from…

A: Given regression equation is y=-107+1.03x If x=184 y=?

Q: Suppose a random sample of 5804 physicians in Colorado showed that 3145 provided at least some…

A:

Q: A doctor at a local hospital is interested in estimating the birth weight of infants. How large a…

A: Given Information: Confidence level = 90% = 0.90 Margin of Error (E) = 2 ounces standard deviation…

Q: A group of students need to submit a project and they need to survey people about their daily…

A: see the handwritten solution

Q: Is there a significant difference in the proportions of patients reporting pain relief? Run the test…

A: Let p1 - p2 be the diff. in the prop. of patients reporting pain relief. Level of significance (α) =…

Q: In a trial of 218 patients who received 10-mg doses of a drug daily, 48 reported headache as a side…

A: Here Given  No of Sample size = n= 218 No of patient had side effect =x=48

Q: You want to see if it makes a difference which lane to be in when there is traffic. You randomly…

A:

Q: The population proportion for a certain characteristic is 0.28. In a sample of 100 people, 25 had…

A: From the provided information, Population proportion (p) = 0.28 Sample size (n) = 100 From which 25…

Q: Use the following information: n = 145, x = 48, a(alpha)= 0.1.To find how large of a sample is…

A: