A statistics lecturer wants to know how long it takes on average for a student to finish Quiz 1. The Quiz was taken by 36 students, and the table below indicates their total time in minutes to finish it.   Use the following data (in minutes), a random sample, to: construct a 70% confidence interval for the mean of the population sample construct a 98% confidence interval for the mean of the population sample find the best point estimate of the population standard deviation

Q: Interpret the results. OA. You can be certain that the population mean price of the stock is either…

A: It is given that • The 90% confidence interval is CI = ( 109.87, 115.13 )• The 95% confidence…

Q: You sample 36 families to find out how much they spent on groceries last month. Your sample mean is…

A: Given data,n=36x=540s=82α=0.05

Q: A sample of 16 Math SAT scores for women was collected. The mean score for the sample was 507 and…

A: Sample size n=16 Sample mean x=507 Sample standard deviation s=115 Confidence interval 95% The…

Q: Assume you select an SRS of size 94 and give them a test. You calculate the mean test score in your…

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Q: Suppose we are interested to construct a confidence interval at 95% confidence level of the mean…

A: The provided information is  α=0.05 The critical value is  zc=1.96  (from standard normal table) The…

Q: Use the data about the sample to calculate a 95% confidence interval for the average income of…

A: 1. The conditions for using t-distribution are: Sample size is small. Population standard deviation…

Q: 61 students are asked in a survey how many hours they work during a week. Their responses have a…

A: The random variable X follows normal distribution. The sample size is 61. The sample mean is 24. The…

Q: An algebra placement test was used to determine placement in mathematics courses. A sample of…

A: Given that, No. of calculus students gave 50 scores.  Margin of error (E) = 4 Confidence level (C) =…

Q: When solving a problem related to one sample and the confidence interval of variance. Which table…

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Q: if E=0.07 and population standard deviation=0.8 then find the sample size for 99% confidence…

A: Margin of error(E)=0.07 population standard deviation(σ)=0.8 confidence level=99%

Q: An article in a local town newspaper discusses the results of state test scores in their town. The…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: ool graduates, and ask them their annual incomes. They give you an average income of $35,000 per…

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

Q: You collect a sample of 61 observations of animal heights, in mm. The sample mean is 65.19 and the…

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Q: You are given the sample mean and the population standard deviation. Use this information to…

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Q: of residents in their tropical Researchers from a certain country were interested in how…

A: For male Mean=10.9 Standard deviations=0.9 Smaple size=93   For female Mean=10.3 Standard…

Q: he average weight of 20 randomly selected cars was 3500 pounds. The sample standard deviation was…

A: given data, n=20df=n-1=20-1=19x¯=3500 pounds s=315 pounds CI=0.90α=1-0.90=0.10

Q: Among those taking the Graduate Record Exam, 18 people are randomly selected. This group had a mean…

A: The point estimate for the population mean for the GRE test is 550. The margin of error is, Thus,…

Q: You collect a sample of 69 observations of animal heights, in mm. The sample mean is 41.89 and the…

A: Given: x¯=41.89s=4.33n=69 The degrees of freedom is obtained as below: df=n-1=69-1=68 The critical…

Q: Suppose you wanted to take another sample of dogs to find a 90% confidence interval of young dogs to…

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Q: READ AND SOLVE THE FOLLOWING: Interval Estimate of Population Mean 1. Suppose that the amount of…

A: We. Have to find confidence interval for given data..

Q: You are given the sample mean and the population standard deviation. Use this information to…

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Q: The Statistics Games are played by a large number of teams across the county. Teams raise money to…

A: We have given that,  Sample mean (x̄) = $ 375, standard deviation (s) = $ 32 and sample size (n) =…

Q: From a normally distributed population, we took a simple random sample of 700 students with a mean…

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Q: Assume that population mean is to be estimated from the sample described. Use the sample results to…

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Q: You are given the sample mean and the population standard deviation . Use this information to…

A: Since you have posted a question with multiple sub parts, we will provide the solution only to the…

Q: You sample 36 students to find out how many hours they spent online last week. Your sample mean is…

A: Given data is appropriate for testing of hypothesis for single mean. Because it is a large sample…

Q: You want to estimate the average and standard deviation for the distance each person at your job…

A: the given  values are sample mean = X =74.12 sample standard deviation = S = 10.20 sample size = n…

Q: Salaries of 25 college graduates who took a statistics course in college have a​ mean of $87,169 and…

A: Introduction: The 100 (1 – α) % confidence interval for the population standard deviation, σ, is the…

Q: Given a mean of 483, a standard deviation of 29, and a sample size of 60, construct a 95 %…

A: A mean of 483, a standard deviation of 29, and a sample size of 60, construct a 95% confidence…

Q: A recent study of 25 students showed that they spend an average of $18.53 for gas per week. The…

A: Given: Sample size n = 25 Sample mean X = 18.53 Sample standard deviation s = 3

Q: The population standard deviation for number of hours of sleep that people get per night is 1.3…

A: A) The population standard deviation is 1.3 hours.

Q: Construct an 80% confidence interval to estimate the population mean using the data below. What…

A: It is given that  X̄ = 34 s = 9.2 n = 20

Q: A sample of 17 Math SAT scores for women was collected. The mean score for the sample was 491 and…

A: Given Mean: x¯=491 Standard deviations: s=108 Sample size: n =17 Confidence interval: C.I.=0.95

Q: /hat is the 95% confidence interval for this sample mean? to 82.0 to 67.4 to 82.9 to 67.6

A: As the population standard deviation is known, we will use z distribution. The critical value z at…

Q: You have 16 vampire bats. These bats have a population variance of 3.4 ounces. You wish to make a…

A: Given: Sample size (n) = 16 Population variance σ2=3.4 Sample mean x¯=15.20 Confidence level = 0.950

Q: ou measure 45 texbook's weights, and find they have mean weight of 82 ounces. assume the population…

A: sample (n)=45 mean (x¯)=82 standard deviation (σ)=3.2 99% confidence interval of the mean .

Q: Suppose you have a sample of five people wher x represents cookie consumption in the past week.  The…

A: Hi, we are supposed to answer three subparts at a time. Therefore, I am answering the first three…

Q: You are given the sample mean and the population standard deviation. Use this information to…

A: From the given information, let X be the price of a certain stock. Total number of business days n =…

Q: 83 students are asked in a survey how many hours they work during a week. Their responses have a…

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Q: A student randomly selects 10 paperbacks at a store. The sample standard deviation is $1.50.…

A: Solution To find confidence interval we will use chi square distribution.

Q: You are doing a problem that requires you to use the Student's T-table. a.) If the number of…

A: Note: Thank you for the question. Since multiple questions are posted, according to our policy, we…

Q: Assume that population mean is to be estimated from the sample described. Use the sample results to…

A: Given information Sample size (n) = 49 Sample mean x̅ = 55.1 Standard deviation (s) = 4.8…

Q: ou are given the smaple mean and the population m standard deviation. Use this info to construct the…

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Q: The time to travel to school for high school students in South Bend is known to have a normal…

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Q: The Statistics Games are played by a large number of teams across the county. Teams raise money to…

A: Sample mean (x̄) =  $ 375 , standard deviation    (s) = $ 32 and sample size (n) = 36 Then,

Q: You are given the sample mean and the population standard deviation. Use this information to…

A: Since we know population standard deviation, Use z-distribution to find z-critical value.…

Q: Tina catches a 14-pound bass.  She does not know the population mean or standard deviation.  So she…

A: From the provided information, The data values are as follow: 9, 12, 13, 10 and 10 Sample size (n) =…