Question

Fonts and reading ease Does the use of fancy type fonts slow down the reading of text on a computer screen? Adults can read four paragraphs of a certain text in the common Times New Roman font in an average time of 22 seconds. Researchers asked a random sample of 24 adults to read this text in the ornate font named Gigi. Here are their times (in seconds):

Do these data provide convincing evidence that it takes adults longer than 22 seconds, on average, to read these four paragraphs in Gigi font?

Short answer

Yes, there is sufficient evidence to show that reading of four paragraphs requires more than$22$ seconds.

Step-by-step solution

Step 1:Given information

The data is

Step 2:Explaination

The test statistic formula is:

$t=\frac{\overline{x}-{\mu }_o}{\frac{s}{\sqrt{h}}}$

Consider, $\mu$be the average reading time to read the four paragraphs.

The null and alternative hypotheses are:

$H_0:\mu =22$

$H_a:\mu >22$

The alternative hypothesis represents that the test is right tailed.

The obtained Minitab output is:

$\text{The p-value is}0.000\text{.}$

$\text{Here,}p\text{-value}(0.000)<\alpha (0.05)$

The null hypothesis is rejected.

Therefore,

At$5\%$ level of significance there is sufficient evidence to show that reading of four paragraphs requires more than $22$seconds.