You sample 36 families to find out how much they spent on groceries last month. Your sample mean is 540 with a standard deviation, s = 82. What is the 95% confidence interval for this sample mean? O 401.4 to 678.6 O 516.9 to 563.1 O 373.5 to 706.5 O 512.3 to 567.7

Q: A research scientist wants to know how many times per hour a certain strand of bacteria reproduces.…

A:

Q: How large a sample should be selected to provide a 90% confidence interval with a margin of error of…

A: Given,population standard deviation(σ)=60margin of error(E)=9α=1-0.90=0.1α2=0.05Z0.05=1.645

Q: For a random sample of 55 overweight men, the mean of the number of pounds that they were overweight…

A: It is given that the sample mean is 32 and the population standard deviation is 4.1.

Q: A recent survey of 6 social networking sites has a mean of 15.9 million visitors for a specific…

A: Given Data: Sample mean (x )=15.9 Standard deviation (sd)=3.3 n=6   We know that x-μsd/n~ tn-1

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

A:

Q: You measure 44 textbook's weights, and find they have a mean weight of 81 ounces. Assume the…

A: Answer: From the given data, Sample size(n) = 44 Mean (x¯) = 81 Standard deviation (σ) = 3.8 95%…

Q: For a random sample of 55 overweight men, the mean of the number of pounds that they were overweight…

A: Given,sample size(n)=55sample mean(x)=32standard deviation(σ)=4.1α=1-0.90=0.1α2=0.05z0.05 =1.645

Q: A simple random sample of 100 items resulted in a sample mean of 80 . The population standard…

A: Obtain the 95% confidence interval for the population mean.   The 95% confidence interval for the…

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: You measure 23 dogs' weights, and find they have a mean weight of 68 ounces. Assume the population…

A:

Q: You measure 35 backpacks' weights, and find they have a mean weight of 64 ounces. Assume the…

A: Mean weight =64 ouncesStandard deviation=4 ounces99% confidence interval i.e. 1% level of…

Q: A research scholar wants to know how many times per hour a certain strand of virus reproduces. The…

A: It is given that,Sample mean = 11.3.Population standard deviation, sigma is 2.3.The sample size, n…

Q: A random sample of  36  drivers used on average  740  gallons of gasoline per year. The standard…

A: The sample size is 36, sample mean is 740 and population standard deviation is 33.

Q: A sample of 10 adult elephants had an average weight of 12,881 pounds. The standard deviation for…

A: Given,sample size(n)=10sample mean(x)=12881standard deviation(s)=27degrees of…

Q: You measure 40 turtles' weights, and find they have a mean weight of 71 ounces. Assume the…

A: From the Standard Normal Table, the z value for 90% level is 1.645.

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: vey of 9 social networking sites has a mean of 13.74 million visitors for a specific month. The…

A: As the population standard deviation is not known, we will use t distribution.Degrees of freedom are…

Q: You measure 48 backpacks' weights, and find they have a mean weight of 72 ounces. Assume the…

A:

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

A: Givenconfidence interval(c)=95%margin of error(E)=8standard deviation(σ)=10

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

A: Given Information: Confidence level = 95% = 0.95 Margin of Error = 5 Population standard deviation…

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: You measure 44 dogs' weights, and find they have a mean weight of 80 ounces. Assume the population…

A: You measure 44 dogs' weights, and find they have a mean weight of 80 ounces. Assume the population…

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

A:

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.