Question

a kid's tooth falls out, they put it under their pillow and wait for the "tooth fairy 3. In America, when (i.e., a parent or relative) to take the tooth while they are sleeping and leave money. You might wonder: On average, how much money does an American child receive from the tooth fairy for a tooth? In 2018, this value was known to be $4.13. Delta Dental ran a study in 2019 to see if this value had changed. After interviewing 1009 parents, they found children received an average of $3.70 with a standard deviation of $1.25. [2 points) a. Define a parameter and write hypotheses for this problem. [2 points] b. Make an 88% confidence interval for the parameter of interest in this problem. [2 points] c. Find a P-value (or a bound on it) for this setting and draw a conclusion using a 0.12 You must include a picture of a labeled sampling distribution and shade an area on it that represents the P-value.

Answer 1

Null Ce ineave 3.10- d.06 3,700.06 ( 3.70-y,13) อ.06107 P-valus 亡 2 x PCz く-7.ou丿 = 0 P-vabua 5 32 4:13 CamScanner