Male horseshoe crabs (Limulus polyphemus) on a beach can become overturned bywaves approaching the beach. These "stranded" males must right themselves or theywill face death by desiccation (drying out) or fall prey to predators such as sea gulls.Over a period of many days on a South Carolina beach, investigators categorized arandom sample of crabs as either stranded or not and additionally noted their agecategory. The researchers wished to determine if there was convincing evidence ofan association between strandedness and age.
a) What is the appropriate null hypothesis for this investigation?
(You may state thishypothesis in ordinary English if you wish.)
b) Using the null hypothesis from part (a), test the appropriate hypotheses using achi-square procedure.

Question

Male horseshoe crabs (Limulus polyphemus) on a beach can become overturned bywaves approaching the beach. These "stranded" males must right themselves or theywill face death by desiccation (drying out) or fall prey to predators such as sea gulls.Over a period of many days on a South Carolina beach, investigators categorized arandom sample of crabs as either stranded or not and additionally noted their agecategory. The researchers wished to determine if there was convincing evidence ofan association between strandedness and age. 
 a) What is the appropriate null hypothesis for this investigation?
 (You may state thishypothesis in ordinary English if you wish.)
b) Using the null hypothesis from part (a), test the appropriate hypotheses using achi-square procedure.

Quizplus · Accepted Answer

The Answer of Male horseshoe crabs (Limulus polyphemus) on a beach can become overturned bywaves approaching the beach. These "stranded" males must right themselves or theywill face death by desiccation (drying out) or fall prey to predators such as sea gulls.Over a period of many days on a South Carolina beach, investigators categorized arandom sample of crabs as either stranded or not and additionally noted their agecategory. The researchers wished to determine if there was convincing evidence ofan association between strandedness and age. 
 a) What is the appropriate null hypothesis for this investigation?
 (You may state thishypothesis in ordinary English if you wish.)
b) Using the null hypothesis from part (a), test the appropriate hypotheses using achi-square procedure.

Male Horseshoe Crabs (Limulus Polyphemus) on a Beach Can Become