1. Give examples of sample statistic and population parameter. 2. Give some properties of any normal...
1. Give examples of sample statistic and population parameter.
2. Give some properties of any normal distribution.
3. What is the total area under a normal distribution curve?
4. What is the mean and standard deviation of standard normal distribution?
5. what percentage of the area under the normal curves lies
a) To the right of µ
b) Between µ - 3σ and µ + 3σ (within three standard deviation of the mean)
Homework Answers
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1. Give examples of sample statistic and population
parameter.
2. Give some properties of any normal...
2. If the difference between the sample mean and the population mean is a result of...
2. If the difference between the sample mean and the population mean is a result of recording the results of a survey incorrectly, then this is referred to as what type of error. b) Find the area under the standard normal curve from z = 0 to z = 4.35 c) Find the value of z so that the area under the standard normal curve in the right tail is .0351 d) determine the area under a normal distribution curve...
Consider two sample means distributions corresponding to the same x distribution. The first sample mean distribution...
Consider two sample means distributions corresponding to the same x distribution. The first sample mean distribution is based on samples of size n=100 and the second is based on sample of size n=225.Which sample mean distribution has the smaller standard error? Explain. What percentage of the area lies under the standard normal curve (a) to the left of the µ? (b) between µ – σ and µ + σ? (c) between µ - 3 σ and µ + 3 σ?
_____________I. The value(s) assigned to a population parameter based on the value(s) of a sample statistic...
_____________I. The value(s) assigned to a population parameter based on the value(s) of a sample statistic is(are) ______________? a) the probabilities B) a sampling distribution C) the probability distribution D) estimates(s) _____________II. For any shaped distribution, we can use the Student t distribution to make a confidence interval for a population mean provided that the sample standard deviation, s, is known and the sample size, n, is ______________? greater than 10 B) at least 30 C) less than 25 ...
urgent one hours plz help quick t-distribution PARAMETER equal to n-1, where n the the sample...
urgent one hours plz help quick t-distribution PARAMETER equal to n-1, where n the the sample size used to estimate the sample mean and standard deviation. 123456789101112131415 Gives the number of STANDARD DEVIATIONS a value is from the mean. 123456789101112131415 Standard deviation of a sample statistic. 123456789101112131415 Using data to determine properties of population parameters. 123456789101112131415 A NORMAL distribution with mean 0 and standard deviation 1. 123456789101112131415 Gives the NORMALITY of sample means for large sample. 123456789101112131415 A known percentage...
Which of the following are properties of the normal curve? Select all that apply. A. The...
Which of the following are properties of the normal curve? Select all that apply. A. The graph of a normal curve is symmetric. B. The high point is located at the value of the mean. C. The graph of a normal curve is skewed right. D. The high point is located at the value of the standard deviation. E. The area under the normal curve to the right of the mean is 1. F. The area under the normal curve...
1. Under any normal distribution of scores, what percentage of the total area falls A. between...
1. Under any normal distribution of scores, what percentage of the total area falls A. between the mean (μ) and a score value that lies one standard deviation (1σ) above the mean? B. between a score value that lies one standard deviation below the mean and a score value that lies one standard deviation above the mean? C. between the mean and a score value that lies +2σ above the mean? D. between a score value that lies −2σ below...
Which of the following statements is not a property of the normal probability distribution?
Which of the following statements is not a property of the normal probability distribution?A. The normal distribution is symmetricB. Exactly two-thirds of all possible observed values of the random variable x are within plus or minus one standard deviations of the population meanC. The mean, median and mode are equalD. The area under the normal curve to the right of the mean is equal to the area under the normal curve to the left of the meanE. All of the...
1. The distribution of the weekly incomes of a restaurant manager follows a normal distribution with...
1. The distribution of the weekly incomes of a restaurant manager follows a normal distribution with a mean of $1000 and the standard deviation of $100. Using the concept of area under the normal cure and the z-score table, determine the following: a. What percentage of the managers earn a weekly income between $750 and $1225? Draw a normal curve, and shade the desired area on your diagram. b. What percentage of the managers earn a weekly income between $1100...
(i) The formula to convert any normal distribution to the standard normal distribution is z =...
(i) The formula to convert any normal distribution to the standard normal distribution is z = (X - µ)/ (ii) The standardized value measures distance from the mean in units of standard deviation. (iii) The area under a normal curve to the right of a z-score of zero is a proportion of 0.50. Select one: a. (i) and (iii) are correct statements but not (ii). b. (i) is a correct statement but not (ii) or (iii). c. (i) and (ii)...
Problem 1. For each of the following scenarios, give notationfor the sample statistics and population parameter...
Problem 1. For each of the following scenarios, give notationfor the sample statistics and population parameter being estimated. Use the information provided to construct a 99% confidence interval. Write the interval in terms of population parameter. In a random sample of 100 families, 67 families have at least one dog Sample statistic is _________________________ Population parameter is _________________________ Calculate the Standard Error Confidence Interval: In the sample of 61 dog owners, the average veterinary expenditure per year is $100 with the standard...
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