Multiple Choice. Choose the letter of the correct answer. Write the letterof your answer before the number (2pts.)I.1. This is the single value used to represent the parameter interest.a. Interval estimate b. point estimatorc. interval estimatord. point estimate_2. The standard error of the mean is equal toa. The population standard deviation divided by sample size n.b. The population variance divided by the sample size n-1.c. The population standard deviation divided by the square root of n.d. The population variance divided by the square root of n._3. Which of the following statements does not refer to the Central Limit Theorem?a. The Central Limit Theorem is true for any distribution, when the sample sizeis at least 30.b. The standard deviation of the distribution of sample means is equal to o.The distribution of sample means is approximately normally distributed.d. The expected value of the mean is of the distribution of sample means is µ.4. It specifies a range within which the unknown parameter may lie.a. point estimatorb. interval estimatorc. point estimated. interval estimate5. What is the main advantage of using the interval estimation over point?estimation in generating the calculation of the parameter mean?a. In interval estimation, the values of lower limit L1 and upper limit L2 areknown.b. In interval estimation, it is constructed in such a way that we can assess theconfidence that the parameter mean may fall to within the range.c. In interval estimation, (1- a) is the degree of certainty that shows the shadedregion in the normal curve.d. In interval estimation, standard deviation is always given.

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Answered: b. point estimator c interval estimator…

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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Let a population consist of the values 9 cigarettes, 17 cigarettes, and 18 cigarettes smoked in a day. Show that when samples of size 2 are randomly selected with replacement, the samples have mean absolute deviations that do not center about the value of the mean absolute deviation of the population. What does this indicate about a sample mean absolute deviation being used as an estimator of the mean absolute deviation of a population? .... . Calculate the mean absolute deviation for each possible sample of size 2 from the population. Sample Mean Absolute Deviation {9,9} {9,17} {9,18} {17,9} {17,17} {17,18} {18,9} {18,17} {18,18} (Type integers or decimals rounded to one decimal place as needed.)
lecture(12.10d): Fill in blanks. When we are comparing our sample data to population data we used------------------------------when the standard deviation is known.or the------------------------------when the standard deviation is unknown.
Chebyshev's Theorem states that for any set of numbers, the fraction that will like within k Standard deviations of the mean is at least 1- 1/k2. Use this theorem to find the fraxtion of all the numbers of a data that must lie within 3 standard deviations from the mean.
Use the Central Limit Theorem to find the mean and standard error of the mean of the sampling distribution. Then sketch a graph of the sampling distribution. The mean price of photo printers on a website is $248 with a standard deviation of $65. Random samples of size 25 are drawn from this population and the mean of each sample is determined. The mean of the distribution of sample means is The standard deviation of the distribution of sample means is. (Type an integer or decimal rounded to three decimal places as needed.) Sketch a graph of the sampling distribution. Choose the correct answer below. O A. ов. Oc. OD. 248 248 443 Mean price (in $) 287 248 Mean price (in $) 251 209 245 Mean price (in $) 53 Mean price (in $)
Noise Levels in Hospitals In a hospital study, it was found that the standard deviation of the sound levels from 25 areas designated as "casualty doors" was 6.0 dBA and the standard deviation of 21 areas designated as operating theaters was 3.7= dBA. At a0.05, can you substantiate the claim that there is a difference in the standard deviations? Use σ1 for the standard deviation of the sound levels from areas designated as "casualty doors." (a)State the hypotheses and identify the claim. H0: H1: This hypothesis test is a one tailed/two-tailed test. (b)Find the critical value. Round the answer to two decimal places. Critical value= (c)Compute the test value. Round the F score value to two decimal places as needed. F= (d)Make the decision. Reject/do not rejecct the null hypothesis. (e)Summarize the results. There is/is not enough evidence to support the claim that there is/is not a difference in the standard deviations of the sound levels.
Claim: The mean systolic blood pressure of all healthy adults is less than 122 mm Hg. Sample data: For 277 healthy adults, the mean systolic blood pressure level is 121.89 mm Hg and the standard deviation is 15.88 mm Hg. Complete parts (a) and (b). a. Express the original claim in symbolic form. Let the parameter represent a value with respect to systolic blood pressure of a healthy adult. (Type an integer or a decimal. Do not round.)
A distribution of values is normal with a mean of 60 and a standard deviation of 7.Find the interval containing the middle-most 82% of scores: __________Enter your answer accurate to 1 decimal place using interval notation. Example: (2.1,5.6)Hint: To work this out, 1) sketch the distribution, 2) shade the middle 82% of the data, 3) label unkown data values on the horizontal axis just below the upper and lower ends of the shaded region, 4) calculate the percentage (area) to the left of the lowermost unknown data value, 5) calculate the TOTAL percentage (area) to the LEFT of the uppermost unknown data value, 6) use invnorm to calculate the lowermost data value, 7) use invnorm to calculate the uppermost data value. The data values you get from steps 6 and 7 are used to answer the question.
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Claim: The mean systolic blood pressure of all healthy adults is less than 125 mm Hg. Sample data: For 272 healthy adults, the mean systolic blood pressure level is 123.92 mm Hg and the standard deviation is 15.65 mm Hg. Complete parts (a) and (b). a. Express the original claim in symbolic form. Let the parameter represent a value with respect to systolic blood pressure of a healthy adult. ▼ (Type an integer or a decimal. Do not round.) b. Identify the null and alternative hypotheses. ▼ ▼ C Ho H₁: (Type integers or decimals. Do not round.)
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Claim: The mean systolic blood pressure of all healthy adults is less than 122 mm Hg. Sample data: For 278 healthy adults, the mean systolic blood pressure level is 119.95 mm Hg and the standard deviation is 15.39 mm Hg. Complete parts (a) and (b). a. Express the original claim in symbolic form. Let the parameter represent a value with respect to systolic blood pressure of a healthy adult. H < 122 (Type an integer or a decimal. Do not round.) b. Identify the null and alternative hypotheses. Ho: H₁: (Type integers or decimals. Do not round.)

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