wo different researchers measured the weight of two separate samples of ruby-throated hummingbirds from the same population. Each calculated a 95% confidence interval for the mean weight of these birds. Research 1 found the 95% confidence interval to be 3.12 g < mu< 3.48g, while Researcher 2 found the 95% confidence interval to be 3.05 g < mu < 3.62g. Answer these 3 questions

Q: In a sample of 310 adults, 205 had children. Construct a 99% confidence interval for the true…

A: Given data, n=310 x=205 p=x/n=205/310=0.661 z-value at 99% confidence is Zc=2.576

Q: A pharmaceutical company claims that its new drug reduces systolic blood pressure. The systolic…

A: From the provided information, Sample size (n) = 9 Confidence level = 95%

Q: A recent study of a very large number of parents on cyberbullying showed that a 95% confidence…

A: Given data,For 95% CILower limit=0.1238Upper limit =0.2036Proportion (p)=?

Q: If Hugo and Lily use a 99% confidence level (z*score of 2.58), which statement is true? Hugo polled…

A:

Q: In a simple random sample of chefs in London, 434 were women and 416 were not. Construct a…

A: Sampling technique: SRS Number of women x = 434 Number of non-women = 416 Critical values table:

Q: A consumer watchdog organization estimates the mean weight of 1-ounce "Fun-Size" candy bars to see…

A:

Q: To test whether the failure rate of an exam is the same for both males and females, researchers…

A: Based on confidence interval we have to conclude about the difference between means if it's same or…

Q: In a sample of 490 adults, 269.5 had children. Construct a 90% confidence interval for the true…

A: Given: n=490 Let x be the children = 269.5 p=xn=269.5490=0.55 The critical value at 0.1 level of…

Q: Suppose that the a college wants to have an idea of the average SAT score of the incoming freshman…

A: The confidence level is 0.90, the standard deviation is 310 and margin of error E is 50.

Q: Your stats teacher wants to estimate the proportion of people at New Jersey beaches who are wearing…

A:

Q: A food snack manufacturer samples 11 bags of pretzels off the assembly line and weighs their…

A: Givensample size(n)=11Mean(x)=15.7standard deviation(s)=0.70

Q: A random sample of 360 medical doctors showed that 106 had a solo practice. As a news writer, how…

A: Obtain the percentage of medical doctors in solo practice. The percentage of medical doctors in solo…

Q: A nutritionist believes that obesity is more prevalent among American adults than it was in the…

A: Hence we are given that; x1=380, n1=1630x2=726, n2=2350 Hence the sample proportions are;…

Q: people from Tanjung Malim has been given cholesterol tests, and 60 of these people had levels over…

A: We have given that,  Favorable cases (X) = 60 and sample size (n) = 150 Then,  We will find the 95%…

Q: A college surveys a sample of 263 of its students to determine whether they would prefer a final…

A: It is given that Sample size n = 263 Number of students who prefer final exam, X = 39 The critical…

Q: A recent survey showed that among 650 randomly selected subjects who completed 4 years of college,…

A:

Q: In a sample of 320 adults, 288 had children. Construct a 95% confidence interval for the true…

A: Here, the number of adults had children, x is 288 and the sample size, n  is 320. The known values…

Q: A clinic measured the systolic blood pressure for a random sample of 10 patients. The resulting 95%…

A: In a randomized sample group, a margin of error is a significant indication that assumes the…

Q: A researcher takes a sample of 25 people and calculates a 90% confidence interval of (4,24) for a…

A: The confidence interval is (4,24).

Q: Suppose that we took an SRS of 1600 eighth-graders and found ã = 285. Compared with an SRS of 2500…

A: If the sample size is smaller then the margin of error is larger.

Q: Each of two pesticide brands is applied to 100 containers of fire ants. Brand1 killed all ants in 65…

A: The level of confidence is 0.95.The critical value using standard normal table is 1.96.

Q: Sam computed a 90% confidence interval for mean from a specific random sample size n. He claims that…

A: Given Information: Sam computed a 90% confidence interval for mean from a specific random sample of…

Q: A survey reported in Time magazine included the question "Do you favor a federal law requiring a 15…

A:

Q: To construct the confidence interval, the quantity tsm is subtracted from and added to the sample…

A: Given:

Q: One researcher finds a 95% confidence interval for a prevalence of heart disease in a population as…

A: We have given that  95% confidence interval is  26.2 percent with margin of error 4.2 percent    90%…

Q: In a sample of 150 men, 132 said that they had less leisure time today than they had 10 years ago.…

A: Given that, x1=132  n1=150 p1^=x1n1=132150=0.88p2^=x2n2=236250=0.944Confidence of level…

Q: A simple random sample of 450 residents in the state of New York is taken to estimate the proportion…

A: The sample proportions are 0.3 and 0.7.

Q: In a study of the accuracy of fast food drive-through orders, Restaurant A had 262 accurate orders…

A: For restaurant A, it is given that 262 orders were accurate and 57 orders were not accurate.  Let p0…

Q: A Gallup poll asked a random sample of U.S. adults, “Would you like to lose weight?” Based on this…

A: Given 95% confidence interval is (0.56, 0.62)

Q: Find a 99% confidence interval for the mean of weights of Siamese cats if the population standard…

A: We have given that Sample mean (x̄) = 11.8, population standard deviation (σ) = 2.1 and sample size…

Q: A pharmaceutical company claims that its new drug reduces systolic blood pressure. The systolic…

A: Obtain the 90% confidence interval for the true difference in blood pressure for each patient after…

Q: Step 2 of 4 :   Calculate the sample standard deviation of the paired differences. Round your answer…

A: The difference is, Before After Difference 174 166 8 176 164 12 204 194 10 180 157 23…

Q: .A research and development engineer is preparing a report for the board of directors on the battery…

A: Given a research and development engineer is preparing a report for the board of directors on…

Q: A recent survey conducted in a nearby town showed that 791 out of 1,495 people do most their holiday…

A: Here, the sample proportion is =7911495=0.5291 Now, for 90% confidence z=1.645

Q: A study found that a 95% confidence interval for the mean μ of a particular population was computed…

A: Given, 95% confidence interval 10 ± 4  Sample size  = 1200         To write the conclusion regarding…

Q: A survey of 95 families showed that 40 of the families owned at least one tv. a. Find the 90%…

A: Number of families in a sample n =95 Let X be the number of families owned at least one tv = 40 p =…

Q: A nutritionist took a random sample of 60 college students at Harvard and made a 95% confidence…

A: Given information: A random sample of n = 60 college students at Harvard is considered. A…

Q: In a sample of 570 adults, 485 had children. Construct a 95% confidence interval for the true…

A: The sample size is 570. The number of successes is 485. We have to construct 95% confidence interval…

Q: When you calculated confidence intervals using a z-test for one sample proportion, what kinds of…

A: Given Information:- Confidence intervals using a z-test for one sample proportion.

Q: he figure to the right shows the results of a survey in which 1018 adults from Country​ A, 1025…

A: Dear Student, As per the guidelines, I can solve only the first 3 subparts, Kindly repost the…

Q: When a population has less variability, for the same margin of error and confidence level, the…

A: As there is less variability standard deviation is also less and smaller standard deviation…

Q: A consumer group reports that a 90% confidence interval for the mean fat content of chicken nuggets…

A: Given that the confidence interval is Lower limit=14 Upper limit=18 Point estimate p=?

Q: How large a sample is needed if we want to believe 98% that the proportion of the sample found lies…

A:

Q: In a sample of 510 adults, 464 had children. Construct a 95% confidence interval for the true…

A: Given that in a sample of 510 adults, 464 had children. 95% confidence level

Q: In a simple random sample of 1200 Americans age 20 and over, 138 of them were found to have Type I…

A: In a simple random sample of 1200 Americans age 20 and over, 138 of them were found to have Type I…

Q: the number of smokers in a sample of 40 students selected from university A is 14 and the number of…

A: Given data,For University An1=40x1=14p1=1440=0.35For University Bx2=84n2=380p2=84380=0.22Construct…

Q: Two different researchers measured the weight of two separate samples of ruby-throated hummingbirds…

A: The formula for the confidence interval for µ is as follows.  sample mean ± critical value…

Q: Suppose the goal is to estimate the parameter stated in question 3 using a 95% confidence interval…

A: Given : Margin of error: ME = 0.048

Q: Suppose a researcher takes a random sample of 1,000 students from a university and creates a 95%…

A: Here AS per policy I should have to answer first main question even though I have calculated 2…

Q: A professor sampled 46 students from a large university to obtain a 95% confidence interval for the…

A: