Teslon Metal 0.93 0:93 0.97l0,87 0,94 097 To0310.99 Ava Mean olandandd devlation= 5. For each height and both cylinders, calculate the average time and the mean standard deviation.

Suppose the average life of kiwi phones is 4.66 years with standard deviation 1.05 years. Let X represent the average lif of 40 r/s kiwi phones. Find P( x > 5)

Plz all will rate

Approximate the population mean and standard deviation of age for females. By the way, we find the midpoints by adding the first numbers before the hyphens in the age column and then dividing by 2 (ex: 0+10/2=5, 10+20/2=15, 20+30/2=25).

In the past, the mean age of students at a summer camp was 16.9 years old. A recent sample of 16 students from the camp found x = 13.4, s = 2.3. a. Build a 80% CI for the current mean age of students at the camp. Round all intermediate calculations to two decimals, then construct the Cl and enter like this: (min,max). Note: if you use a built-in Cl command on a calculator/computer, you might get marked wrong due to rounding. Use the formulas given in the text/notes. b. Use your CI to decide whether the mean age of students at the camp has changed from 16.9 years old. O Yes, the mean has probably changed since the old value of u is not right in the middle of the new CI No, the mean has not changed since the old value of u is right in the middle of the new O No, the mean has probably not changed since the new Cl contains the old value of u O Yes, the mean has probably changed since the new CI does not contain the old value of u c. For this problem, it is important that we know that ages…

Which of the measurements of variation computed in parts a-c have the same units of measure (number of sword shafts) as the original variable?

The torque, T(N.m), required to rotate shafts of different diameters, D(mm), on a machine is shown in the table below. If the low is: T = aD" where a and n are constants. Determine the constants a and n to give the best fit to following data: D (тm) | 7.0 T (N.m) 0.974 Then standard deviation (S,) about the mean. 10 1.71 25 18 4.33 40 15.3 7.28

Determine the standard deviation of the densities:                x1 = 2.85 g/ml,     x2 = 2.67 g/ml,      x3 = 2.63 g/ml   a. none of these b. 0 g/ml c. 0.1172 g/ml d. 0.117 g/ml e. 0.117189 g/ml f. 0.1 g/ml g. 0.12 g/ml h. 0.11 g/ml

A large automobile insurance company selected samples of single and married male policyholders and recorded the number who made an insurance claim over the preceding three-year period. Single Policyholders Married Policyholders ni = 412 n2 = 778 Number making claims = 75 Number making claims = 111 a. Use a= 0.05. Test to determine whether the claim rates differ between single and married male policyholders. z-value (to 2 decimals) p-value (to 4 decimals) We cannot conclude that there is the difference between claim rates. b. Provide a 95% confidence interval (to 4 decimals) for the difference between the proportions for the two populations. Enter negative answer as negative number.

Fluorescent lightbulbs have lifetimes that are normally distributed with a mean of 6.2 years and a standard deviation of 1 year. The figure below shows the distribution of lifetimes of fluorescent lightbulbs. Calculate the shaded area under the curve.Express your answer in the decimal form accurately to at least two decimal places. Answer: