4TH PT REVIEWER IN STAT

If all the points of a scatter diagram lie on a straight line falling from left upper corner to the right bottom corner, what kind of the correlation is illustrated?

• Zero correlation

• Perfect negative correlation

• High degree of positive correlation

• Perfect positive correlation

What data analysis to be used to evaluate whether teachers' stress can be predicted by lack of sleep, nutritional habits, employment and interpersonal relationship.

• Multivariate
• Univariate

• Bivariate

• all of the above

A study compared the number of years of education a person received and that person's average yearly salary. It was determined that the relationship between these two quantities was linear and the correlation coefficient was 0.91. Which conclusion can be made based on the findings of this study?

• There was no relationship.

• There was a weak relationship.

• There was a strong relationship.

• There was an unpredictable relationship.

Luz is selling tomatoes in the market. She decided to change the price of her tomatoes every day for seven days to see whether the change in the price of tomatoes would affect sales. Her collected data are shown in the following table. Create the equation of regression line.

• ŷ = 84.78 + 1.14x

• ŷ = 84.78 - 1.14x

• ŷ = 84.78 + 1.41x

• ŷ = 84.87 - 1.14x

Under the normal curve, what do you call the values that separate the rejection region from the acceptance region?

• Confidence coefficients

• z-values

• Computed statistics

• t-values

What is a graph of ordered pairs showing a relationship between two sets of data?

• bivariate

• dependent variable

• scatter plot

• univariate data

What is the only option for the null hypothesis?

• H0 = k

• H0 > k

• H0 < k

• H0 ≠ k

If the variance is unknown and the sample size is small, which test statistic is appropriate?

• t-test

• z-test

• two-tailed test

• one-tailed test

What do you call the non-shaded part of the bell curve?

• Non-rejection region

• Rejection region

• Tailed region

• Critical region

What term is being used to describe a proposed explanation, assertion, or assumption about a population parameter or about the distribution of a random variable?

• statistic

• decision

• hypothesis

• probability