Quiz
Data and distributions
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Perguntas do quiz (24)
1Another name for variance is [blank_start]mean square.[blank_end]
- Amean square
2If there are four plants, and we take two leaves from each, there will be four data points.
- AVerdadeiro
- BFalso
3Mean square is calculated as:
- Asum of squares / degrees of freedom
- Bmean square / degrees of freedom
- Cdegrees of freedom / sum of squares
- Ddegrees of freedom / mean square
4What is the shape of a normal distribution curve?
- Acontinuous and bell-shaped
- Bdiscrete and right-skewed for low means
- Cdiscrete
5What is the shape of a Poisson distribution curve?
- Acontinuous and bell-shaped
- Bdiscrete and right-skewed for low means
- Cdiscrete
6What is the shape of a Binomial distribution?
- Adiscrete
- Bdiscrete and right-skewed for low means
- Ccontinuous and bell-shaped
7A normal distribution is defined by the [blank_start]mean[blank_end] and [blank_start]standard deviation[blank_end].
- Amean
- Bstandard deviation
8The width of the bell of a normal distribution is defined by the [blank_start]standard deviation[blank_end], which is how much [blank_start]variation[blank_end] there is.
- Astandard deviation
- Bvariation
9Which of these data sets could be normally distributed?
- Aquantities that are the sum of many independent processes
- Bmeans of samples of random variables
- Ccounts of independently occurring events in homogenous units
- Dcounts of successes vs failures
10Which of these datasets could have a Poisson distribution?
- Acounts of independently occurring events in homogenous units
- Bquantities that are the sum of many independently occurring processes
- Cmeans of samples of random variables
- Dcounts of successes vs failures
11Which of these data sets could have a Binomial distribution?
- Acounts of independently occurring events in homogenous units
- Bmeans of samples of random variables
- Cquantities that are the sum of many independently occurring processes
- Dcounts of successes vs failures
12The Poisson distribution is defined by the [blank_start]mean[blank_end] only.
- Amean
13The Binomial distribution is defined by the [blank_start]number of trials[blank_end] (n) and the probability of [blank_start]one of two events[blank_end] happening (p).
- Anumber of trials
- Bone of two events
14A 95% confidence interval will contain the [blank_start]true value of the mean[blank_end] 95% of the time.
- Atrue value of the mean
15The t-distribution is [blank_start]wider[blank_end] than the normal distribution at lower degrees of freedom.
- Awider
- Bnarrower
16The tcrit value is :
- Ahow many standard deviations you should use
- Bhow many SEs of the mean you should use
17Which of the following is narrower:
- A95% CI
- B99% CI
18If you were measuring the effect of a drug on blood pressure ('-' or '+'), what would the distribution be?
- Abinomial
- Bnormal
- CPoisson
19If there was no effect of a drug on blood pressure, what would the probability of its effect being positive be?
- A0
- B0.5
- C1
- D0.1
20What is meant by H0
- Anull hypothesis
- Balternate hypothesis
21What is meant by HA
- Anull hypothesis
- Balternate hypothesis
22When should you use a two-tailed t test?
- Awhen there is no strong reason to suppose a change would be one or the other
- Bwhen there is a strong reason to suppose a change would be one or the other
23The p-value of a two-tailed t test describes:
- Athe probability of getting a value (or more extreme) if the null hypothesis is true
- Bthe probability of getting a value (or more extreme) if the alternate hypothesis is true
24If the p-value is more than a, we should
- Aaccept the null hypothesis
- Bfail to reject the null hypothesis
- Cfail to accept the null hypothesis
- Daccept the alternate hypothesis
Informações
- Descrição
- MIBTP Statistics Quiz sobre Data and distributions, criado por Bethany Richmond em 04-11-2018.
- Autor
- Bethany Richmond
- Idioma
- English
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