The alternative hypothesis states that there is an association between the variables.

Ho: There is no association between gender and longer finger.

Ha: There is no association between gender and longer finger.

asked 2021-06-21

\(\begin{array} {lc} & \text{Gender} \ \text {Longerfinger Longer finger} & \begin{array}{l|c|r|r} & \text { Female } & \text { Male } & \text { Total } \\ \hline \text { Index finger } & 78 & 45 & 123 \\ \hline \text { Ring finger } & 82 & 152 & 234 \\ \hline \text { Same length } & 52 & 43 & 95 \\ \hline \text { Total } & 212 & 240 & 452 \end{array} \\ \end{array}\)

asked 2020-12-09

A random sample of 88 U.S. 11th- and 12th-graders was selected. The two-way table summarizes the gender of the students and their response to the question "Do you have allergies?" Suppose we choose a student from this group at random.

\(\begin{array}{c|cc|c} & \text { Female } & \text { Male } & \text { Total } \\ \hline \text{ Yes } & 19 & 15 & 34 \\ \text{ No } & 24 & 30 & 54 \\ \hline \text{ Total } & 43 & 45 & 88\\ \end{array}\)

What is the probability that the student is female or has allergies?

\((a)\frac{19}{88}\)

(b)\(\frac{39}{88}\)

(c)\(\frac{58}{88}\)

(d)\(\frac{77}{88}\)

asked 2021-05-30

asked 2021-08-11

asked 2021-05-31

A random sample of 1200 U.S. college students was asked, "What is your perception of your own body? Do you feel that you are overweight, underweight, or about right?" The two-way table summarizes the data on perceived body image by gender. \(\begin{array}{ccc} & \text{Gender} \\ \text{Body image} & {\begin{array}{l|c|c|r} & \text { Female } & \text { Male } & \text { Total } \\ \hline \text { About right } & 560 & 295 & 855 \\ \hline \text { Overwerght } & 163 & 72 & 235 \\ \hline \text { Underweight } & 37 & 73 & 110 \\ \hline \text { Total } & 760 & 440 & 1200 \end{array}} \\ \end{array}\)

What percent of respondents feel that their body weight is about right?

asked 2021-05-22

asked 2021-01-02

A random sample of U.S. adults was recently asked, "Would you support or oppose major new spending by the federal government that would help undergraduates pay tuition at public colleges without needing loans?" The two-way table shows the responses, grouped by age.

\(\begin{array}{ccc} & Age \ Response & {\begin{array}{l|r|r|r|r|r} & 18-34 & 35-49 & 50-64 & 65+ & Total \\ \hline Support & 91 & 161 & 272 & 332 & 856 \\ \hline Oppose & 25 & 74 & 211 & 255 & 565 \\ \hline Don't know & 4 & 13 & 20 & 51 & 88 \\ \hline Total & 120 & 248 & 503 & 638 & 1509 \end{array}} \ \end{array}\)

Do these data provide convincing evidence of an association between age and opinion about loan-free tuition in the population of U.S. adults?