A marketing firm wants to estimate how much root beer the average teenager drinks per year. A previous study found a standard deviation of 1.24 liters. How many teenagers must the firm interview in order to have a margin of error of at most 01 liter when constructing a 99% confidence interval? Multiple Choice 1021 1,020 1019.39 1020.39

Q: a. Which of the error bars indicates the standard deviation? b. Which error bar indicates the…

A: Disclaimer: As the question has multiple parts, only first three will be answered.   The easiest and…

Q: Suppose that the standard deviation of the weight of the M&M-Mars candy was 0.75 gram before a…

A: Given: σ=0.75 Data 19.68 20.66 19.56 19.98 20.65 19.61 20.55 20.36 21.02…

Q: Hamsters How large are hamster litters? Among 47 goldenhamster litters recorded, there were an…

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Q: 47. A meteorologist who samples 13 thunderstorms found that the average speed at which the travelled…

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Q: Let's say you took a sample of 445 voice-activated smart TVs. The mean rate at which these TVs need…

A: It is given that sample mean is 3.5 and the standard deviation is 0.8.

Q: A sample of 56 Charleston County households have a mean income of $27,519 with a standard deviation…

A:

Q: c) Calculate the margin of error and confidence interval. (d) Interpret the confidence interval, in…

A: Given: Sample size, n=500Sample mean, x¯=12.5Sample sd,s=6.1Confidence level=90%

Q: The Centers for Disease Control reported the percentage of people 18 years of age and older who…

A:

Q: Listed below are speeds​ (mi/h) measured from traffic on a busy highway. This simple random sample…

A: Given information- Confidence level, c = 99% We have given speeds​ (mi/h) measured from traffic on a…

Q: The president of an all-female school wants to know if the students at her school studied more or…

A:

Q: An economist is interested in studying the incomes of consumers in a particular country. The…

A: It is given that the standard deviation is 1,000. Margin of error, E is 50. The confidence level is…

Q: In 2017, Americans spent a record-high $9.1 billion on Halloween-related purchases (the balance…

A: From the provided information, Sample size (n) = 16 adults

Q: n a survey of 500 students, 180 students said that they prefer classes on Mondays and Wednesdays…

A:

Q: A hospital is investigating waiting time for the emergency room. A sample of 30 patients finds a…

A: The degree of freedom is, n -1 = 30-1 = 29. The level of significance is 0.05(1-0.95) and the test…

Q: How many computers? In a simple random sample of 125 households, the sample mean number of personal…

A: Given data: Sample size  = 125 Mean = 1.56 Standard deviation = 0.71

Q: The 2008 General Social Survey asked, “What do you think is the ideal number of children for a…

A: we associate with the interval estimate is called a confidence interval. This probability indicates…

Q: 15. A random sample of 100 visitors to a popular theme park spent an average of $142 on the trip…

A: SOLUTION: Given average x=142          standard deviation σ=47.5          random sample n=100

Q: Q4) A sample survey of 30 discount brokers showed that the mean price charged for a trade of 100…

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Q: The average salary of 25 random employees in a certain financial sector was 3400 USD. The sample…

A:

Q: Wal-Mart Stores say that their new line of plasma televisions will last for 61,000 hours. You decide…

A: a. Confidence interval: Since the population standard deviation is unknown, t distribution can be…

Q: airline is considering charging a two-tiered rate for checked bags based on their weight. Before…

A:

Q: Find the best point estimate of the population mean. b. Construct the 95% confidence interval of the…

A: It is given that Sample size n = 35 Sample mean = 16.6 Population SD = 2.8 The critical values of Z…

Q: A professor is trying to find the average exam grade in his class. The sample mean should be within…

A: Determine the value of sample size n. The value of sample size n is obtained as shown below: Use…

Q: Assume that the TI generated a confidence interval for the population mean, 136 < μ <150 What…

A: The confidence interval for the population mean generated by TI is 136 < µ < 150.The point…

Q: The average salary of 25 random employees in a certain financial sector was 3400 USD. The sample…

A: The Margin of error for 90% confidence interval for the population mean when the population standard…

Q: Do People Think the Sun Goes around the Earth? In the 2018 General Social Survey, people were asked…

A: According to our policy we can answer only first three part for remaining please repost the…

Q: The following stemplot shows the swimming speeds, in kilometers per hour (km/h), for a random sample…

A: Solution: a. Let X be the swimming speed of emperor penguins. From the given information, x-bar =…

Q: The average salary of 64 employee was 5400 and the sample standard deviation was 280. Find the 95%…

A: It's a t distribution as the population standard deviation is unknown

Q: You measure 32 textbooks' weights, and find they have a mean weight of 63 ounces. Assume the…

A: The mean is 63 and the population standard deviation is 9.

Q: 11. 300 high school students were asked how many hours of TV they watch per day. The mean was 2…

A:

Q: To help consumers assess the risks they are taking, the Food and Drug Administration (FDA) publishes…

A:

Q: A college admissions officer takes a simple random sample of 90 entering freshmen and computes their…

A: The correct option is: C) No.Given information:

Q: In a survey, 22 people were asked how much they spent on their child's last birthday gift. The…

A: Given information Sample size(n) = 22 Sample mean = 39 Sample standard deviation = $3 Significance…

Q: The General Social Survey asked: “How many e-mails do you send in a day?” The results of 928…

A:

Q: A sociologist develops a test to measure attitudes about public transportation, and 20 randomly…

A: The confidence interval is a set of elements that have been imagined to comprise, with a specified…

Q: Which distribution (z or t) should you use to construct a confidence interval and why? Construct a…

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

Q: A sample of 49 managers reveals a sample mean of $45,420. The standard deviation of the sample is…

A: Given: n=49, x=45420 and s=2050. Use z test and the value of z at 95% confidence interval is 1.96.

Q: The amount of material used in making a custom sail for a sailboat is normally distributed with a…

A: Confidence interval is a range of values it contains the true population parameter with specified…

Q: B. In a random sample of 36 full-term newborn babies, the mean weight was found to be 7 pounds and a…

A:

Q: What is the minimum sample size that would guarantee that the margin of error is less than or equal…

A: The population standard deviation is given by 2000 And the required margin of error is less than or…

Q: A simple random sample of 41 Veterans Day celebrations was selected and the number of children…

A: (14) Obtain the 98% confidence interval for the mean number of children attending all 2017 Veterans…

Q: TD Ameritrade claims that the mean price charged for a trade of 100 shares at $50 per share is at…

A: For 90% confidence level,α=1-90%=1-0.9=0.1 The value of z at α=0.1 in lower tail is 1.282.

Q: The amount of material used in making a custom sail for a sailboat is normally distributed with a…

A: Given σ=64, n=15  and  x¯=912

Q: A small business ships specialty homemade candies to anywhere in the world. Past records indicate…

A:

Q: A marketing firm wants to estimate how much root beer the average teenager drinks per year. A…

A:

Q: Phonics is an instructional method in which children are taught to connect sounds with letters or…

A: Given that,  Point estimate = sample mean = x¯= 34.09 sample standard deviation = S = 23.13 sample…

Q: A medical devices company wants to know the number of hours its MRI machines are used per day. A…

A: Given information- Population standard deviation, σ = 4 hours Confidence interval = 0.98…

Q: A bank wishes to estimate the mean credit card balance owed by its customers. The population…

A: We have to find sample size ....

Q: he amount of material used in making a custom sail for a sailboat is normally distributed with a…

A: As population standard deviation is known, the critical value will be calculated from standard…

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.