A random sample has been taken from normal distribution and the following confidence intervals constructed using the same data: (43.53, 55.87) and (41.59, 57.81). What is the value of the sample mean? OA. 99.4 OB. 42.56 OC. 49.7 O D. 87.775

Q: How many more Tweets are students at Hempstead High School sending in 2017 than in 2012? The table…

A: If an interval is proposed as an estimate of the unknown parameter, then it is interval estimation.…

Q: Calculate the lower 95% confidence interval for the population mean. (round to the nearest tenth)…

A: given data n = 31σ2 = 15∴σ = 15 = 3.873x¯ = 5695% ci for μ = ?

Q: Construct a confidence interval for the mean of the paired differences for the two populations with…

A:

Q: Which of the following would increase the width of a confidence interval for a population mean?

A:

Q: Construct the confidence interval for the ratio of the population variances given the following…

A:

Q: A confidence interval was found to be (2.4, 7.9). What was the point estimate? O A. 5.27 O B. 5.2 O…

A: Given confidence interval is (2.4 , 7.9)Upper limit =7.9Lower limit =2.4

Q: Construct a confidence interval for the mean of the paired differences for the two populations with…

A: Solution: From the given information, n=32, d-bar=1.358, α=0.05 and sd=0.635.

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: Find the left and right critical values used in the confidence interval for the ratio of the…

A: The level of significance is 0.10 (=1-0.90).

Q: Construct a confidence interval for the mean of the paired differences for the two populations with…

A: Given, sample size (n) = 37 sample mean ( d̄ ) = 4.132  Standard deviation ( Sd )  = 0.749…

Q: The weights of 5 squash (in pounds) are 10, 17, 17.5, 18.5, and 19.5. The sample weights have a mean…

A:

Q: Suppose the 90% confidence interval for a population mean is (20, 55). What is the point estimate…

A:

Q: n=10, x=13.0, s=4.5. Using StatCrunch, find a 95% confidence interval for the mean. A. (9.80, 16.20)…

A: The random sample of size, The sample mean, The sample standard deviation, The confidence interval…

Q: You must estimate the mean temperature (in degrees Fahrenheit) with the following sample…

A: Given data is81.7, 76.9, 71.2, 99.4, 78.9, 64.2, 98.1, 71.4, 108.3,Mean(x¯)=sum of the data settotal…

Q: In a manufacturing process, a random sample of 19 manufactured bolts has a mean length of 3.2 inches…

A:

Q: B. Construct a 95% confidence interval estimate of 4-4, the difference between the mean weight of…

A: Given Information: B) 95% confidence interval estimate of difference between the mean weight of…

Q: 26 randomly selected students took the calculus final. If the sample mean was 90 and the standard…

A:

Q: The baseball coach tracked how long it took 8 of his players to do a series of drills.  The times…

A: We have given the times recorded (in minutes) of 8 players.

Q: You must estimate the mean temperature (in degrees Fahrenheit) with the following sample…

A: temperature (in degrees Fahrenheit) with the following sample temperatures: 10.1  13.9  19.5  38…

Q: The mean time taken to design a house plan by 40 architects was found to be 19 hours with a standard…

A: Step 1:Given data :Sample size n=40degrees of freedom df=40−1=39Sample mean xˉ=19Sample standard…

Q: Listed below are Richter scale magnitudes of randomly selected earthquakes. 3.09 2.76 2.65 3.44 3.01…

A: It is an important part of statistics . It has wide applications in testing of hypothesis as well as…

Q: wish to construct a 99% confidence interval

A: Given that  Sample size (n) =14 Mean money spent (x¯ )= $145 = Sample mean  Sample standard…

Q: In a random sample of eleven people, the mean driving distance to work was 25.7 miles and the…

A: Given that, n=no. of sample=11 x=mean=25.7 s=standard deviation=4.1 Confidence interval is 99%

Q: Construct a 95% confidence interval using the rounded sample statistics that was obtained in the…

A: # Given : sample mean (xbar)=14.35375  And sample standard deviations=1.9689224  Then to find 95%…

Q: A random sample of 56 fluorescent light bulbs has a mean life of 645 hours and assume that the…

A: The given data is as follows:Sample size, Sample mean, Population standard deviation,

Q: A sample of 19 heads of lettuce was selected. Assume that the population distribution of head weight…

A: Given that the sample size, n=19, mean weight, x¯=2.91  pound, and standard deviation, s=0.65 pound.…

Q: You must estimate the mean temperature (in degrees Fahrenheit) with the following sample…

A:

Q: confidence

A:

Q: Construct a confidence interval for the ratio of the population variances given the following sample…

A:

Q: The following sample data are from a normal population: 10, 8, 12, 15, 13, 11, 7, 4. a. What is the…

A: