when the population 7. An interval estimate is the sample statistic that is used to estimate the population parameter. 8. If 90% confidence interval estimate is increased to 95% confidence interval estimate, the width of the interval will also increase.

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Chapter1: Starting With Matlab
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Np 7 8
I. Write TRUE if the statement is correct, or FALSE otherwise.
1. A sample statistic that is used to estimate the population parameter is called estimat
2. When population standard deviation is not known, sample standard deviation can
a good estimator of population standard deviation.
3. The t-distribution is unique for each different degree of freedom.
4. The z-value used when computing confidence intervals for proportion vary by degr
of freedom.
5. The confidence interval estimate of the population mean is constructed around the
sample mean.
6. The t-distribution is used to construct confidence interval for the population mean
when the population standard deviation is known.
7. An interval estimate is the sample statistic that is used to estimate the population
parameter.
8. If 90% confidence interval estimate is increased to 95% confidence interval
estimate, the width of the interval will also increase.
9. The best point estimator for the populatoion mean is the sampe mean.
10. The 95% confidence interval for a population mean implies that there is a 0.95
probability that the true population parameter mean will be contained in the interval
II. Multiple Choice: Write the letter of your answer on the blank provided.
A random sample of 111 bottles of perfume showed an average content
It is known that the population standard deviation of the contents is 0.33 ounces. In
this problem, the 12 ounces is
1.
12 ounces.
C. the standard error
A. a parameter
B. a statistic
D. sample size
2.
What is the margin of error for the estimation of the population mean when s=24.5,
n=25,and =50.3 at 90% confidence level?
A. 8.33
C. 8.38
B. 8.35
D, 8.39
3.
What is the critical value t for the confidence level 99% and n= 27 to estimate the
confidence interval of the population mean?
A. 2.052
B. 2.056
C. 2.771
D. 2.779
Transcribed Image Text:I. Write TRUE if the statement is correct, or FALSE otherwise. 1. A sample statistic that is used to estimate the population parameter is called estimat 2. When population standard deviation is not known, sample standard deviation can a good estimator of population standard deviation. 3. The t-distribution is unique for each different degree of freedom. 4. The z-value used when computing confidence intervals for proportion vary by degr of freedom. 5. The confidence interval estimate of the population mean is constructed around the sample mean. 6. The t-distribution is used to construct confidence interval for the population mean when the population standard deviation is known. 7. An interval estimate is the sample statistic that is used to estimate the population parameter. 8. If 90% confidence interval estimate is increased to 95% confidence interval estimate, the width of the interval will also increase. 9. The best point estimator for the populatoion mean is the sampe mean. 10. The 95% confidence interval for a population mean implies that there is a 0.95 probability that the true population parameter mean will be contained in the interval II. Multiple Choice: Write the letter of your answer on the blank provided. A random sample of 111 bottles of perfume showed an average content It is known that the population standard deviation of the contents is 0.33 ounces. In this problem, the 12 ounces is 1. 12 ounces. C. the standard error A. a parameter B. a statistic D. sample size 2. What is the margin of error for the estimation of the population mean when s=24.5, n=25,and =50.3 at 90% confidence level? A. 8.33 C. 8.38 B. 8.35 D, 8.39 3. What is the critical value t for the confidence level 99% and n= 27 to estimate the confidence interval of the population mean? A. 2.052 B. 2.056 C. 2.771 D. 2.779
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