A scientist wondered if there was a difference in the average daily intake of dairy products between men and women. He took a sample of n1 = 50 adult men and n2 = 50 adult women and recorded their daily intakes of dairy products in grams per day. A summary of the sample results of it is presented in the table. He constructs a 95% confidence interval for the difference in the average daily intakes of dairy products for men and women. Can it be concluded that there is a difference in the average daily intakes for men and women

Q: According to a report on sleep deprivation by the Centers for Disease Control and Prevention, the…

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Q: A department store finds that in a random sample of 200 customers, 60% of the sampled customers had…

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Q: A recent study among 150 street hawkers in Cape Town showed that 48 of them are of the opinion that…

A: Given Data: n=150 x=48

Q: In Good Cholesterol Bad Cholesterol by Roth and Streicher , data from eight fast food restaurants…

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Q: The figure to the right shows the results of a survey in which 1001 adults from Country​ A, 1002…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…

Q: Males and females were asked what they would do if they received a $100 bill in the mail that was…

A: For Males : The sample size , N1=70N_1 = 70 Those who said Yes ,  X1=55X_1 = 55X1​=55:…

Q: The figure to the right shows the results of a survoy in which 1013 adults from Country A, 1001…

A: It was found that out of the 1013 adults from country A, 33% of the adults say national identity is…

Q: A recent study among 120 street hawkers in Johannesburg showed that 42 of them are of the opinion…

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Q: In August 2004, Time magazine, reporting on a survey of men’s attitudes, noted that “Young men are…

A: It is given that out of 129 surveyed 18-24 year old men, 80 said they were comfortable talking about…

Q: confidence interval for the proportion of college students who have texted during class was found to…

A: Given

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

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

A:

Q: In a random sample of 500 people eating lunchbat a cafeteria on various fridays, it was found that…

A: Given X=160 n=500 P=X/n

Q: In a random sample of 500 people eating lunch at a cafeteria on various Fridays, it was found that…

A: Given that Sample size n= 500  Favorable cases x=160 Sample proportion p^=x/n

Q: A large trucking company wants to estimate the proportion of its trailer truck population with…

A: Solution: From the given information, n=200, p-hat is 0.30 and the confidence level is 0.90.

Q: A certain article indicates that in a sample of 1,000 dog owners, 680 said that they take more…

A:

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: A poll conducted randomly in 2014 found that 52% of U.S. adult Twitter users get at least some news…

A: Proportion is 0.52. The standard error 0.024 The absolute value of Zα/2 is 2.5758 using the Excel…

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: When Mendel conducted his famous genetics experiments with peas, one sample of offspring consisted…

A: Find z-critical value:…

Q: For many years businesses have struggled with the rising cost of health care. But recently, the…

A: Given n=857 P=0.57 Confidence interval is 90 %

Q: You drop by your local independent coffee shop on your way to class. While standing in​ line, you…

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Q: A national opinion poll found that 44% of all American adults agree that parents should be given…

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

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Q: A political candidate is anxious about the outcome of the next election. To have his next survey…

A: A political candidate is anxious about the outcome of the next election. To have his next survey…

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: For many years businesses have struggled with the rising cost of health care. But recently, the…

A:

Q: The Vegetarian Resource Group commissioned Harris Poll in 2016 to conduct a nationally…

A: a. The sample proportion is, p-hat = 3.3%=0.033. The sample size is 2,015. Since the required…

Q: A study was being done to estimate the proportion of students who receive financial aid. If the…

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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: How effective is the flu shot?  In a control study, 94 of the 859 participants who received the…

A: Given ,  x1==94 , n1=859x2==46 , n2=923p1=x1n1=94859=0.1094p2=x2n2=46923=0.0498 α=0.05

Q: For many years businesses have struggled with the rising cost of health care. But recently, the…

A: Obtain the margin of error. The value of the margin of error is obtained below as follows: Use…

Q: If there was a 95% confidence interval of say, (0.48, 0.68), about a product being preferred by…

A: The confidence interval at 100 (1 – α) % confidence level gives us an interval estimate about the…

Q: A certain article indicates that in a sample of 1,000 dog owners, 620 said that they take more…

A: Solution: Given information: n= 1000 Sample size of dog owners  x= 620 dog owners aid that they take…

Q: There was concern among health officials in the Windham area that an unusually large percentage of…

A:

Q: In a random sample of 200 females and 100 males who watched a certain television program, 94 females…

A: For Females : Out of 200 females , X = 94 females indicated they like it Sample proportion 1 =…

Q: A large trucking company wants to estimate the proportion of its tracker truck population with…

A:

Q: In a large study designed to compare the risk of cardiovascular disease (CVD) between smokers and…

A: Solution: Given information: The 95% confidence interval for the difference (smoker minus nonsmoker)…

Q: A 90% confidence interval for the difference between the proportion of college students who use…

A:

Q: When calculating a confidence interval for one sample with a continuous outcome and the sample…

A: It is given that the sample size is greater than 30.

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: 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: A certain article indicates that in a sample of 1,000 dog owners, 660 said that they take more…

A: The provided data mentions the value of sample size, n is 660 and the value of x is 470. The sample…

Q: After receiving complaints from his customers about the store being closed on Sundays, a storekeeper…

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Q: A sociologist is comparing the proportion of teenage boys who receive a text message at least once…

A: The  Conditions for the Confidence interval for the difference in population proportions • Samples…

Q: Suppose you compute a confidence interval with a sample size of 37. What will happen to the…

A: If the sample size increases from 37 to 70 then, the margin of error of the confidence interval…

Q: A survey of 800 women shoppers found that 17% of them shop on impulse. what is 98% confidence…

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Q: A random sample of 180 men indicated that 50 were smokers, and a random sample of 150 women surveyed…

A: Given; p1=50180=0.28p2=39150=0.26Level of significance=0.02 Confidence interval is given by-…

Q: A phase three clinical trial for a new medication proposed to treat depression has 1237…

A: It is given that sample size (n) is 1,237 and x is 650.

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.