The null hypothesis can be described as

A statement that there is no difference or association

Assumptions for ANOVA analysis are as the following, EXCEPT:

Data is related and not mutually exclusive

Which of the following statement is wrong?

Mean BMI of married is significantly different from widowed

Regarding Interval Estimation, which of the following statements is false?

The Confidence Interval is not affected by study sample size

Which one of these statements reflects a null hypothesis?

Caffeine consumption is not associated with exam performance

A Type I error occurs when the null hypothesis is

rejected but the null hypothesis is actually true

Which of the following is NOT used to examine the normality of data distribution?

Levene's test of homoscedasticity

Regarding Chi-Square statistical test, which of the following statements is False?

Chi square test can be used for 2x2 contigency table only

Which of the following findings is not a correlation?

Malay men are more likely to smoke than other ethnicity

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Inferential Statistics Quiz

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One best answer quiz about Inferential statistics

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Questions 20

Answers

1
_________ statistics are used to infer the sample analysis as the true population parameter.
Inferential
Descriptive
Regression
Correlation
2
The null hypothesis can be described as
A statement that there is no difference or association
A statement of the expected results
The same as the research hypothesis
The different groups are significantly different
3
Assumptions for ANOVA analysis are as the following, EXCEPT:
Independent and random samples
Populations have equal variances
Data is related and not mutually exclusive
Sample populations are normally distributed
4
Which of the following statement is wrong?
The BMI data distribution should follow normal distribution
There is a significant relationship btw marital status & BMI
This is one way analysis of variance statistical test
Mean BMI of married is significantly different from widowed
5
Regarding Interval Estimation, which of the following statements is false?
The typical Confidence Interval is 95% CI
The Confidence Interval is not affected by study sample size
The confidence level is also known as 1- α
Width of CI is affected by the confidence level, α
6
Which test is best to analyse proportion of lung cancer cases among different ethnic groups?
Mann-Whitney U test
Analysis of variance (ANOVA)
Pearson's Chi-square Test
Student's t-test
7
Which one of these statements reflects a null hypothesis?
Older adults have worse memories than younger adults
Men will score higher than women on spatial awareness
Caffeine consumption is not associated with exam performance
As temperature increases so too will the level of aggression
8
A Type I error occurs when the null hypothesis is
accepted and null hypothesis is actually true
accepted but research hypothesis is actually true
rejected and the research hypothesis is actually true
rejected but the null hypothesis is actually true
9
The two forms of t-tests are
One-way and two-way Factorial and interaction
Wilcoxon sum and signed rank tests
Independent and dependent
Bivariate and multivariable tests
10
Which of the following is a type of parametric statistical test?
Pearson correlation
Wilcoxon sigend rank test
Spearman correlation
Kruskal-Wallis test
11
'Gender' is type of which variable?
Numerical, nominal
Numerical, continuous
Categorical, ordinal
Categorical, nominal
12
A t-test is used to compare
Two proportions
Two means
Three means
None of the above
13
Which of the following is NOT used to examine the normality of data distribution?
Comparing mean, mode and median
Levene's test of homoscedasticity
Kolmogorov-Smirnov statistic test
Checking skewness and kurtosis values
14
Regarding Chi-Square statistical test, which of the following statements is False?
Chi square test can be used for 2x2 contigency table only
Observed frequency data is compared to expected frequency.
McNemar’s test is used to analyse paired / matched data
The degree of freedom depends on number of columns and rows.
15
Incorrectly rejecting a true null hypothesis is an example of what?
Type I error
Type II error
Beta error
Hawkin's effect
16
The probability of a Type II error is related to __________.
study design
sample size
randomisation
significance level (alpha)
17
Which of the following findings is not a correlation?
Testosterone level and verbal aggression scores
Long revision hours is associated with higher exam scores
Malay men are more likely to smoke than other ethnicity
Relationship between height (m) and BMI
18
Accepting a false null hypothesis is an example of what?
Significance testing
Sampling error
Type II error
Type I error
19
Assumptions for Chi-square test are as follows, EXCEPT:
Lowest expected frequency in any cell should be 5 or more
Random sample selection
Normal distribution of data
Independent and mutually exclusive observations
20
Which test is best to compare BMI between students and teachers?
Dependent t-test
Independent t-test
One-way t-test
Chi-square test

Inferential Statistics Quiz Flashcards | StudBud