Assume that a sample is used to estimate a population mean μμ. Find the 95% confidence interval for a sample of size 58 with a mean of 30.3 and a standard deviation of 10.3. Enter your answer as an open-interval (i.e., parentheses) accurate to one decimal place (because the sample statistics are reported accurate to one decimal place). 95% C.I. =  Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal pla

Q: The data set represents the weights, in grams, of 10 randomly selected adult male fox squirrels from…

A: (a)   Obtain the value of the sample mean and standard deviation.   Use EXCEL Procedure to obtain…

Q: The population standard deviation for the total snowfalls per year in a city is 13 inches. If we…

A: From the provided information, Population standard deviation (σ) = 13 Confidence level = 95% Margin…

Q: The ages of a group of 141 randomly selected adult females have a standard deviation of 16.3 years.…

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Q: Assume that a sample is used to estimate a population mean µ. Find the 99.5% confidence interval for…

A: Solution To calculate the confidence interval we will use t distribution.

Q: The ages of a group of 148 randomly selected adult females have a standard deviation of 17.1…

A: Given: n = 148 σ=17.1 E=0.5

Q: Determine the level of confidence in the preparation of the population mean confidence interval if…

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Q: Assume that a sample is used to estimate a population mean u. Find the 99.5% confidence interval for…

A: Confidence interval give a range of values for an unknown parameter of the population. The width of…

Q: The ages of a group of 135 randomly selected adult females have a standard deviation of 16.2 years.…

A: We have given that  Standard deviation =sigma =16.2 Margin of error =E= 1.5 99% confidence.

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 ages of a group of 134 randomly selected adult females have a standard deviation of 17.2 years.…

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Q: A simple random sample of size n=17 is drawn from a population that is normally distributed. The…

A: The random variable X follows approximately normal distribution. The sample size is 17. The sample…

Q: Find the confidence interval for the mean when sigma is unknown and summary statistics are given. A…

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Q: Assume that a sample is used to estimate a population mean �. Find the 95% confidence interval for a…

A: It is required to find the 95% confidence interval to estimate the population mean.

Q: Assume that a sample is used to estimate a population mean . Find the margin of error M.E. that…

A: Answer: - Given, sample size n = 20 ,  sample mean x = 37.5                  The sample standard…

Q: Find the sample size required to estimate the mean IQ of all  college students. Assume we want a 99…

A: From the given information, σ=15 and E=2.

Q: A sample of size 50 from a normal distribution has sample mean 5 and sample variance 20. Find 96%…

A: To find the confidence interval for the variance, we need to use the Chi-squared distribution. The…

Q: Assume that a sample is used to estimate a population mean μμ. Find the 99.5% confidence interval…

A:

Q: The ages of a group of  153 randomly selected adult females have a standard deviation of  16.3…

A: The population standard deviation is 16.3, and confidence level is 90%.

Q: he density netion of the cont variable X, the total number of hours, in units of 100 hours, that a…

A: We want to find average and variance.

Q: The ages of a group of 120 randomly selected adult females have a standard deviation of 18.1 years.…

A: In statistics, standard deviation is defined as a measure of variability, that indicates how distant…

Q: If a variable has a distribution that is bell-shaped with mean 19 and standard deviation 5, then…

A: Given :A variable has a dist. that is bell-shaped withMean ()=19Standard deviation ()=5

Q: The ages of a group of 137 randomly selected adult females have a standard deviation of 17.2 years.…

A: Given , E = 0.5 ,  σ=17.2 (1-α)100% = 98% α=0.02

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

A: Given95% confidence interval N=361 x = 59.1 seconds. z= 4.9 SecondsFind the margin of error?

Q: The ages of 128 randomly selected adult females have a standard deviation of 17.2 years. Assume that…

A: Given data:sample size = 128 Population standard deviation = 17.2 Confidence level = 98%

Q: Assume that a sample is used to estimate a population mean μ. Find the margin of error M.E. that…

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Q: The pulse rate of 147 randomly selected adult males has a standard deviation of s=12.5 bpm. We want…

A: The margin of error for a 99% confidence interval for the population mean is given by MOE=zα2×σn we…

Q: Assume that a sample is used to estimate a population mean μ. Find the margin of error M.E. that…

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Q: The ages of a group of 154 randomly selected adult females have a standard deviation of 16.8…

A:

Q: The ages of a group of 140 randomly selected adult females have a standard deviation of 16.4…

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Q: population mean μ. Find the margin of error M.E. that corresponds to a sample of size 19 with a mean…

A: Given Sample size (n) =19 Sample standard deviation=8.8 Confidence interval=80%

Q: Assume that a sample is used to estimate a population mean μ. Find the margin of error M.E. that…

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

Q: Assume that a sample is used to estimate a population mean µ. Find the margin of error M.E. that…

A: From the provided information, Sample size (n) = 22 Sample mean (x̅) = 52.2 Standard deviation (s) =…

Q: Assume that a sample is used to estimate a population mean. Find the 90% confidence interval for a…

A: The summary of statistics is, x¯=42.9,s=20.4,n=62 The degree of freedom is, df=n-1   =62-1   =61…

Q: If we perform a paired t test and retain the null hypothesis, then what does this mean if we made…

A: The null and alternative hypothesis is,

Q: me that a sample is used to estimate a population mean μμ. Find the 90% confidence interval for a…

A: As the population standard deviation is not known, we will use t-distribution. Given: Xˉ=16.8 s=13.1…

Q: Assume that a sample is used to estimate a population mean μμ. Find the 95% confidence interval for…

A: From the given information, Consider, the provided data is as given below: Sample size (n)…

Q: Assume that a sample is used to estimate a population mean . Find the 95% confidence interval for a…

A: given data n = 41x¯ = 54.6σ = 7.395% ci for μ = ?

Q: The ages of a group of 155 randomly selected adult females have a standard deviation of 16.4 years.…

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

Q: In a random sample of ten cell phones, the mean full retail price was $456.00 and the standard…

A: Let X be the full retail price.Given,

Q: You measure the weights of thirty-six random oranges and find that they have a mean weight of 91…

A: We have given that,  Sample mean (x̄) = 91, population standard deviation (σ) = 3.6, sample size (n)…

Q: If a variable has a distribution that is bell-shaped with mean 27 and standard deviation 6, then…

A: Given : A variable has a dist. that is bell-shaped with Mean (μ)=27 Standard deviation (σ)=6

Q: Assume that a sample is used to estimate a population mean μμ. Find the 99.5% confidence interval…

A: Solution: Let X be the random variable. From the given information, x-bar=41.7, S=12.3 and n=438.

Q: An ecologist is studying the impact of local polluted waters on the growth of alligators. The length…

A: Length of adult male alligators follows a normal distribution with µ and standard deviation 2. n…

Q: Suppose a certain species bird has an average weight of 3.5 grams. We can assume that the weights of…

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Q: The ages of a group of 138 randomly selected adult females have a standard deviation of 16.1 years.…

A: We have given that  Sigma =16.1  Margin of error =E=1.5