Which of the following is an example of quantitative data?
a. Your Social Security number
b. The ZIP code of your home address
c. Your gender
d. Google's closing stock price today
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Google's closing stock price today
,A Type I error occurs in hypothesis testing when we
a.) fail to reject the alternative hypothesis and the alternative hypothesis is false
b.)reject the alternative hypothesis and the alternative hypothesis is true
C.)fail to reject the null hypothesis and the null hypothesis is false
d.) reject the null hypothesis and the null hypothesis is true
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reject the null hypothesis and the null hypothesis is true
What is the relationship between the standard deviation of the sample mean and the
population standard deviation?
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se (x-bar) = sigma/Sqr(N)
a sampling plan states
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, -its objectives
-target population
-population frame (the list from which the sample is selected)
-operational procedures for collecting data
-statistical tools for data analysis
An educator has collected a sample of students who took the SAT twice, the first time
before any SAT-specific tutoring, and the second time after receiving such tutoring.
She wants to know if the mean SAT score differs significantly before and after
receiving tutoring.
a. one sample t-test
b. paired sample t-test
c. independent samples t-test
d. one-way analysis of variance (ANOVA)
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B. paired samples t-test
Automobiles traveling on a road with a posted speed limit of 65 miles per hour are
checked for speed by a state police radar system. The following table is a frequency
distribution of speeds.
45 up to 55 - 50
55 up to 65 - 325
65 up to 75 - 275
75 up to 85 - 25
What proportion of the cars traveled at least 55 but less than 65 miles per hour?
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, 50 + 325 + 275 + 25 = 675
325/675 = .48
a researcher claims that the amounts of acetaminophen in a certain brand of cold
tablets have a standard deviation different from the 3.3mg claimed by the
manufacturer.
Express the null and alternative hypothesis
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H0: SD= 3.3mg
H1: SD is not equal to 3.3mg
which of the following is an example of sample mean?
a. sigma^2 = 10
b. µ = 12
c. x-bar = 20
d. sigma = 3.2
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C. X-bar = 20
The number of iPhones sold today at an Apple store is an example of
a. Your Social Security number
b. The ZIP code of your home address
c. Your gender
d. Google's closing stock price today
Give this one a try later!
Google's closing stock price today
,A Type I error occurs in hypothesis testing when we
a.) fail to reject the alternative hypothesis and the alternative hypothesis is false
b.)reject the alternative hypothesis and the alternative hypothesis is true
C.)fail to reject the null hypothesis and the null hypothesis is false
d.) reject the null hypothesis and the null hypothesis is true
Give this one a try later!
reject the null hypothesis and the null hypothesis is true
What is the relationship between the standard deviation of the sample mean and the
population standard deviation?
Give this one a try later!
se (x-bar) = sigma/Sqr(N)
a sampling plan states
Give this one a try later!
, -its objectives
-target population
-population frame (the list from which the sample is selected)
-operational procedures for collecting data
-statistical tools for data analysis
An educator has collected a sample of students who took the SAT twice, the first time
before any SAT-specific tutoring, and the second time after receiving such tutoring.
She wants to know if the mean SAT score differs significantly before and after
receiving tutoring.
a. one sample t-test
b. paired sample t-test
c. independent samples t-test
d. one-way analysis of variance (ANOVA)
Give this one a try later!
B. paired samples t-test
Automobiles traveling on a road with a posted speed limit of 65 miles per hour are
checked for speed by a state police radar system. The following table is a frequency
distribution of speeds.
45 up to 55 - 50
55 up to 65 - 325
65 up to 75 - 275
75 up to 85 - 25
What proportion of the cars traveled at least 55 but less than 65 miles per hour?
Give this one a try later!
, 50 + 325 + 275 + 25 = 675
325/675 = .48
a researcher claims that the amounts of acetaminophen in a certain brand of cold
tablets have a standard deviation different from the 3.3mg claimed by the
manufacturer.
Express the null and alternative hypothesis
Give this one a try later!
H0: SD= 3.3mg
H1: SD is not equal to 3.3mg
which of the following is an example of sample mean?
a. sigma^2 = 10
b. µ = 12
c. x-bar = 20
d. sigma = 3.2
Give this one a try later!
C. X-bar = 20
The number of iPhones sold today at an Apple store is an example of
