20. The sample size determines: a. representativeness b. accuracy c. representativeness and accuracy d. the population...
20. The sample size determines:
a. representativeness
b. accuracy
c. representativeness and accuracy d. the population statistic value
e. the mean generated from the sample statistic
Homework Answers
Sample size determine
Option B
Accuracy it is right answer because as sample size increases we have more information and it increase accuracy
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20. The sample size determines:
a. representativeness
b. accuracy
c. representativeness and accuracy d. the population...
9.138 Consider a random sample of size 20 from a normal population with hypothesized mean 1.618. ...
9.138 Consider a random sample of size 20 from a normal population with hypothesized mean 1.618. a. Write the four parts for a one-sided, left-tailed hypothesis test concerning the population mean with α 0.05. b. Suppose x = 1.5 and s = 0.45. Find the value of the test statistic, and draw a conclusion about the population mean. c. Find the p value associated with this hypothesis test.
9.138 Consider a random sample of size 20 from a normal population...
Specify the fourth property of statistical population. a. Representativeness b. Correlation c. Distribution d. Average level...
Specify the fourth property of statistical population. a. Representativeness b. Correlation c. Distribution d. Average level e. Variety
Stratified sampling (the use of strata) enhances ________ of the population: A. representativeness B.. exclusion C....
Stratified sampling (the use of strata) enhances ________ of the population: A. representativeness B.. exclusion C. convenience D. purposefulness
A. Suppose you take a sample of size n from a population and calculate a statistic...
A. Suppose you take a sample of size n from a population and calculate a statistic from that sample. The statistic could be a sample proportion p, a sample mean x, or another statistic. Then suppose we repeat this process over and over again until we find all possible samples of size n from the population (this is a theoretical idea) and we calculate the same statistic from 1. each sample. The collection of all of the statistics calculated is...
A population distribution has mean 50 and standard deviation 20. For a random sample of size...
A population distribution has mean 50 and standard deviation 20. For a random sample of size 100, the sampling distribution of the sample mean has: A. mean 5 and standard deviation 2 B. mean 0.5 and standard deviation 0.2 C. mean 50 and standard deviation 0.2 D. mean 50 and standard deviation 2 E. mean 50 and standard deviation 20
Suppose a random sample of size 60 is selected from a population with o -8. Find...
Suppose a random sample of size 60 is selected from a population with o -8. Find the value of the standard error of the mean in each of the following cases (use the finite appropriate) population correction factor i a. The population size is infinite (to 2 decimals). b. The The popuiation size is N-50,000 (to 2 decimals) c. The popuilation size is N- 5000 (to 2 decimals). d. The population size is N -500 (to 2 decimalis) In the...
A simple random sample of size n=40 is drawn from a population. The sample mean is...
A simple random sample of size n=40 is drawn from a population. The sample mean is found to be 106.9,and the sample standard deviation is found to be 15.1. Is the population mean greater than 100 at the α=0.025 level of significance? A) Determine the null and alternative hypotheses. B) Compute the test statistic C) Determine the P-value. (Round to three decimal places as needed.) D) What is the result of the hypothesis test? ____ the null hypothesis because the...
When estimating a population mean by a sample mean, the margin of error does NOT depend...
When estimating a population mean by a sample mean, the margin of error does NOT depend on ______. A) The confidence level B) The sample mean C) The sample size D) The population standard deviation What is the sampling distribution of a statistic? A) The distribution of observations of the statistic for all possible sizes of samples from a population B) The distribution of all possible observations of the statistic for samples of a given size from a population C)...
A random sample of size 20 is selected from a normal population, where the population standard...
A random sample of size 20 is selected from a normal population, where the population standard deviation is unknown. Assume that a two-tailed test at the 1% significance level is to be used. For what value of t will the null hypothesis not be rejected? Select one: a. None of the suggested answers are correct. b. to the left of -2.845 or to the right of 2.845 c. to the left of -2.528 or to the right of 2.528 d....
Suppose that a random sample of size 1 is to be taken from a finite population...
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9.138 Consider a random sample of size 20 from a normal population with hypothesized mean 1.618. a. Write the four parts for a one-sided, left-tailed hypothesis test concerning the population mean with α 0.05. b. Suppose x = 1.5 and s = 0.45. Find the value of the test statistic, and draw a conclusion about the population mean. c. Find the p value associated with this hypothesis test.
9.138 Consider a random sample of size 20 from a normal population...
A. Suppose you take a sample of size n from a population and calculate a statistic from that sample. The statistic could be a sample proportion p, a sample mean x, or another statistic. Then suppose we repeat this process over and over again until we find all possible samples of size n from the population (this is a theoretical idea) and we calculate the same statistic from 1. each sample. The collection of all of the statistics calculated is...
Suppose a random sample of size 60 is selected from a population with o -8. Find the value of the standard error of the mean in each of the following cases (use the finite appropriate) population correction factor i a. The population size is infinite (to 2 decimals). b. The The popuiation size is N-50,000 (to 2 decimals) c. The popuilation size is N- 5000 (to 2 decimals). d. The population size is N -500 (to 2 decimalis) In the...
Suppose that a random sample of size 1 is to be taken from a finite population of size N. Answer parts (a) through (c) below. a. How many possible samples are there? A. N + 1 B. N-1 0 C. N D. 1 b. Identify the relationship between the possible sample means and the possible observations of the variable under consideration. Choose the correct answer below. A. Each possible sample mean is equal to an observation, only if the population...
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