The number of television sets coming off a production line each day is known to have a standard deviation of 130.5 sets per day. The production manager tells you that the 95% confidence interval for the population mean was 735.5 to 820.5. How large of a sample was this confidence interval based on?

Q: A random sample of  46  four-year-olds attending day care centers provided a yearly tuition average…

A: Solution

Q: In a survey,  20 people were asked how much they spent on their child's last birthday gift.  The…

A: Solution: Given information: n= 20 Sample size  x= $38 Sample mean s= $7 Sample standard deviation

Q: If n = 220,p = 0.4,then what will be the 87.4% confidence interval for the population proportion?

A:

Q: Find a 95% confidence interval for a mean, µ, where n = 324, x̄ = 2.7, s = .91, and se = .06.

A: Given: n = 324, x̄ = 2.7, s = .91, se = .06.

Q: The mean and the standard deviation of a normal population are 11,795 and 14054 respectively. If n=…

A:

Q: How large a sample should be selected to provide a 95%  confidence interval with a margin of error…

A:

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: Question 4 You have taken 10 observations from normally distributed data that is known to have a…

A: Given data: Population standard deviation = 1 Sample size = 10 Sample mean = 32 To calculate  the…

Q: Find the 95% confidence interval for the standard deviation of the ages of residents in a senior…

A:

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: If n=13, (x-bar)=48, and s=12, construct a confidence interval at a 95% confidence level. Assume the…

A: Mean = 48Standard deviation = 12Sample size = 13

Q: If n=12, (x-bar)=33, and s=16, construct a confidence interval at a 80% confidence level. Assume the…

A:

Q: A sample of the reading scores of 30 fifth graders has mean of 62.the standard deviation of the…

A: Given,   Sample size = 30 Sample mean = 62 Population standard deviation = 15   The objective is to…

Q: How large a sample should be selected to provide a 95% confidence interval with a margin of error of…

A: Population standard deviation, sigma is 50. The z-critical value for 95% confidence interval is…

Q: sample of 35 students was taken from the local university. These students spent an average of $180…

A:

Q: Find the 95% confidence interval for the standard deviation of the ages of residents in a senior…

A:

Q: Find 95% confidence interval for the population mean, if the sample size is 40, the sample mean is…

A:

Q: ow large a sample should be selected to provide a 95% confidence interval with a margin error of 4?…

A: confidence in terval is=95 % α=1-CI=1-0.95=0.05population standard deviation:σ=20E=4sample size n=?

Q: Based on this, construct a 90% confidence interval for the true population mean watermelon weight

A: It is given that Sample size n = 20 Sample mean M = 51 Population SD = 4.3 The critical value of Z…

Q: SAT scores have a mean of 500 and a standard deviation of 100. Let’s continue with the above…

A: Given information :  Mean = x = 500 Standard deviation = σ = 100 level of significance = α = 0.05…

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: 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: How large a sample should be selected to provide a 95% confidence interval with a margin of error of…

A: Given, Margin error (E) = 6 Standard deviation = 20   The objective is to find the sample.…

Q: joan is researching the IQ of a particular monkey species. She measured the IQ in 15 monkeys with a…

A:

Q: If n 28, = 37, and s = 6.2, construct a confidence interval at a 97% confidence level. Assume the…

A: Solution: The following information is given to us: s=6.2 n =28 A 97% confidence interval is…

Q: How large a sample should be selected to provide a 95% confidence interval with a margin of error of…

A: From the provided information, Population standard deviation (σ) = 50 Margin of error (E) = 8…

Q: How large a sample should be selected to provide a 95% confidence interval with a margin of error of…

A:

Q: If n= 220, p-hat= .4, then what will be the 87.4% confidence interval for the population proportion?

A:

Q: A sample of 1100 observations taken from a population produced a sample proportion of 0.36 . Make a…

A: Given information Sample proportion = 0.36 Sample size (n) = 1100

Q: You measure 50 turtles' weights, and find they have a mean weight of 76 ounces. Assume the…

A:

Q: A random sample of 49 drivers used on average 753 gallons of gasoline per year. The standard…

A: Introduction: The 100 (1 – α) % confidence interval for the population mean, μ, when the population…

Q: How large a sample should be selected to provide a 95%  confidence interval with a margin of error…

A: Given: Margin of error (E) = 8 Population standard deviation (σ) = 40 Confidence Interval = 0.95 α =…

Q: How large a sample should be selected to provide a 95% confidence interval with a margin of error of…

A: The confidence level is 95%. Margin of Error, ME = 5 Population Standard deviation, σ=48.   With…

Q: a sample of 25 automobiles shows that the mean price was $20,500 with standard deviation of $2,500.…

A: Givensample size = n = 25Mean price = $20,500Standard deviation = $2500 The distribution is normal.…

Q: You measure 49 dogs' weights, and find they have a mean weight of 72 ounces. Assume the population…

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Q: Suppose the standard deviation of the losses had been $3600 instead of $1800. What would the larger…

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Q: You measure 43 dogs' weights, and find they have a mean weight of 34 ounces. Assume the population…

A: The objective of this question is to construct a 95% confidence interval for the true population…

Q: You measure 39 turtles' weights, and find they have a mean weight of 48 ounces. Assume the…

A:

Q: If n=21, (x-bar)=37, and s=3, construct a confidence interval at a 90% confidence level. Assume the…

A: Given Information: Sample size n=21 Sample mean x¯=37 Sample standard deviation s=3 Confidence level…

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.