a-researcher-collected-data-on-the-drying-times-in-minutes-of-four-types-of-wall

Question

A researcher collected data on the drying times (in minutes) of four types of wall paint: matte, satin, semi-gloss, and gloss. The data were collected under controlled temperature and humidity conditions. The drying times (in minutes) are listed below:

Matte: $38 comma 41 comma 43 comma 39 comma 40$

Satin: $44 comma 47 comma 45 comma 46 comma 43$

Semi-gloss: $50 comma 49 comma 51 comma 48 comma 52$

Gloss: $42 comma 40 comma 41 comma 43 comma 44$

At the $0.05$ significance level, use the Kruskal-Wallis test to determine whether there is a significant difference in the median drying times among the four paint types.

Accepted Answer

There is sufficient evidence to conclude that at least one paint type has a different median drying time.

Answer

All paint types have the same drying time based on the Kruskal-Wallis test.

Answer

The mean drying times of all paint types are significantly different.

Answer

There is no difference in drying time variability among the paint types.