Stats
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is the main purpose of the 95% CI for a mean? | To estimate the population mean
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| How is the width of a CI for a mean determined? | The t-multiplier and the standard error of the estimate
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| Heights of 18yer old students Female: n = 10, m = 168 cm, s = 7.5 Male: n = 12, m = 180 cm, s = 7.25 What is an approxamite of the standard error of the difference between the sample means? | 0.28
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| Heights of 18yer old students Female: n = 10, m = 168 cm, s = 7.5 Male: n = 12, m = 180 cm, s = 7.25 What is the degrees of freedom associated with the s.e. of the difference between the sample means? | 21
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| Heights of 18yer old students Female: n = 10, m = 168 cm, s = 7.5 Male: n = 12, m = 180 cm, s = 7.25 What is the value of t for the CI of 95% for the entire sample size? | t = 2.08
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| Heights of 18yer old students Female: n = 10, m = 168 cm, s = 7.5 Male: n = 12, m = 180 cm, s = 7.25 The 95% CI for m(F) - m(M) is (15.51, 8.49). Interprete it. | With 95% confidence we can estimate that the difference between the height of 18 year old men and the height of 18 year old women is somewhere bwtween 8.49cm and 15.51cm.
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| What is the type of error associated with asking people to do an online survey. | Self-selection bias
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| Selection Bias | When a group is surveyed that doesn't have a connection with the population of interest
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| Self-selection Bias | When a group has the choice of replying to a survey
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