For number 6-9: In a recent study of 35 Grade 3 pupils, the mean number of hours per week that they played video games was 16.6. The standard deviation of the population was 2.8. 6. Which of these is the point estimator? A. 2.8 C. 35 D. 40 В. 16.6 7. Determine the standard error A. 0.47 C. 16.6 В. 2.8 D. 35 8. Find the values of the z-score at 95% confidence level for the estimated interval of the population mean. C. ±2.54 D +3.96 A. ±1.64
For number 6-9: In a recent study of 35 Grade 3 pupils, the mean number of hours per week that they played video games was 16.6. The standard deviation of the population was 2.8. 6. Which of these is the point estimator? A. 2.8 C. 35 D. 40 В. 16.6 7. Determine the standard error A. 0.47 C. 16.6 В. 2.8 D. 35 8. Find the values of the z-score at 95% confidence level for the estimated interval of the population mean. C. ±2.54 D +3.96 A. ±1.64
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 26PFA
Related questions
Question
Nii 6 7 8
Transcribed Image Text:A farmer wishes to estimate the average height of mango trees in his farm. He wants to
be 99% confident that the estimate is accurate within 2 feet. How many samples shoua
he takeif he knew that the standard deviation of heights measured was 4.38 leet?
stimator.
n can be
A. at most 31
C. at most 32
D. at least 32
B. at least 31
5. What is the margin of error for the estimation of proportion given that p=0.7, n=
400 and confidence level of 0.90?
degrees
end the
A. 0.0358
C. 0.0478
D. 0.0449
B. 0.0376
mean
For number 6-9: In a recent study of 35 Grade 3 pupils, the mean number of hours per week that
they played video games was 16.6. The standard deviation of the population was 2.8.
tion
6.
Which of these is the point estimator?
A. 2.8
C. 35
D. 40
5
nterval.
В. 16.6
7. Determine the standard error
A. 0.47
С. 16.6
В. 2.8
D. 35
punces.
ces. In
8.
Find the values of the z-score at 95% confidence level for the estimated interval of the
population mean.
C. ±2.54
A. ±1.64
D. ±3.96
B. ±1.96
= 24.5,
9. Determine the confidence interval of the mean time in playing video games.
A. 15.4<p< 17.8
B. 15.7 <p< 17.5
C. 17.4<p<19.8
D. 7.4 <µ< 17.8
A recent survey of 8 social networking has a mean of 13.1 million visitors for a specific
10.
month with the standard deviation was 4.l million. Construct a 95% confidence
te the
Interval of the true mean.
A. 7.70<p<14.5
B. 9.70 <p< 16.5
C. 6.4<p<16.4
D. 5.4 <p< 17.8
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