=The standard deviation for a population is o 14.6. A sample of 17 observations selected from this population gave a mean equal to143.05. The population is known to have a normal distribution.Round your answers to two decimal places.a. Make a 98% confidence interval for u.b. Construct a 95% confidence interval for μ.c. Determine a 90% confidence interval for μ.id. Does the width of the confidence intervals constructed in parts a through c decrease as the confidence level decreases?

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Answered: The standard deviation for a population…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The standard deviation for a population is o = 15.2. A sample of 49 observations selected from this population gave a mean equal to 73.8. a. Make a 91% confidence interval for µ: b. Construct a 96 % confidence interval for u: c. Determine a 98 % confidence interval for u: d. A question for you to think about: how does the width of the confidence interval change as the confidence level increases? Note 1: Your confidence interval should be given in the format of (a, b) where a and b are two numbers. Note 2: Keep 2 decimal places in your confidence interval answers.
The following information is obtained for a sample of 80 observations taken from a population. SS = 390.124, se = 0.955, and ý = 164.13 – 2.55x Make a 97 % confidence interval for B. Round your answers to two decimal places. The 97 % confidence interval for B is ( i i ).
1 h 4. A fashion designer wants to know how many new dresses women buy each year. A sample of 650 women was taken to study their purchasing habits. Construct the 95% confidence interval for the mean number of dresses purchased each year if the sample mean was found to be 5.6. Assume that the population standard deviation is 1.3. Round your answers to one decimal place. Answer: Lower endpoint: Upper endpoint: iny ir
The standard deviation for a population is o = 7.69. A random sample selected from this population gave a mean equal to 47.71. Make a 95% confidence interval for u assuming n = 49. Round your answers to two decimal places. i to i
You measure 48 dogs' weights, and find they have a mean weight of 50 ounces. Assume the population standard deviation is 6.8 ounces. Based on this, construct a 90% confidence interval for the true population mean dog weight. (Note you will use the z distribution for your critical value since the population standard deviation is given).Give your answers as decimals, to two places. ¯x ± M.O.E______ ±______ounces
I need to know how to solve with what to input into my TI-84 calculator.
Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the z-score of a man 79.7 inches tall. (to 4 decimal places) X μl Use the formula Z σ the standard deviation, and x is the man's height. where is the mean, o is
Construct the confidence interval for the population mean μ. c=0.98, x=6.9, σ=0.6, and n=51
Let μ denote some population mean of interest and suppose a 95% confidence interval for μ is calculated to be (0.63, 0.73) and a 99% confidence interval for μ is calculated to be (0.61,0.75). Also, suppose that we want to test H0: μ = 0.74 vs. Ha: μ ≠ 0.74 What can you say about the corresponding p-value? Choose from following letters. a. The corresponding p-value will be smaller than 0.05 but larger than 0.01. b. The corresponding p-value will be larger than 0.05. c. I can’t say anything about the corresponding p-value until I run the test.
The amounts of a chemical compound y that dissolved in 100 grams of water at various temperatures x were recorded. The data were coded and recorded in the accompanying table. Use this information to answer parts a and b. a) Construct a 99% confidence interval for the average amount of chemical that will dissolve in 100 grams of water at 50°C. ______ < μ_y|50 < _______ (Round to three decimal places as needed.) b) Construct a 99% prediction interval for the amount of chemical that will dissolve in 100 grams of water at 50°C. __________ < y₀ < _____________ (Round to three decimal places as needed.)
I. A statistician randomly sampled 20 observations from a population. The descriptive statistics are given below: n = 20, ¯X=25, s = 4 You are required to estimate the population mean with 95 percent confidence. Please answer the following questions: (Note that t0.025=2.093 and Z0.025=1.96) The point estimate of the population mean (μ) is (type the value here):= Answer. The appropriate confidence interval is Answer because Answer and we Answer. Compute 95 percent confidence interval and type the values of lower confidence limit and upper confidence limit below (round up to two decimal places). Lower Confidence Limit:= Answer, Upper Confidence Limit:= Answer, II. Now the statistician takes a random sample of 20 observations from another population. The descriptive statistics are given below: n = 20, ¯X=25, σ = 4 You are required to estimate the population mean with 95 percent confidence. Please answer the following questions: (Note that t0.025=2.093 and Z0.025=1.96)…
The standard deviation for a population is σ = 15.6 . A sample of 25 observations selected from this population gave a mean equal to 137.30 . The population is known to have a normal distribution.Round your answers to two decimal places.a. Make a 99 % confidence interval for μ .= ( , )b. Construct a 95 % confidence interval for μ . = ( , )c. Determine a 90 % confidence interval for μ .=( , )

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