The time it takes Jessica to bicycle to school is normally ...

[SO00]

The time it takes Jessica to bicycle to school is normally distributed with mean 15 minutes and variance 4 . Jessica has to be at school at 8:00 am. Suppose you saw her at class, and she said it took her 23 minutes to get to school that day. Which of the following is a reasonable inference or conclusion?
 a. Twenty-three minutes to school is not an unusually long commute time.
  b. A commuting time of 23 minutes is highly unusual or atypical.
  c. The distribution of commute times must not be normal with mean 15 minutes and standard deviation 2 minutes.
  d. Both A commuting time of 23 minutes is highly unusual or atypical and The distribution of commute times must not be normal with mean 15 minutes and standard deviation 2 minutes are feasible conclusions.
  e. Both Twenty-three minutes to school is not an unusually long commute time and The distribution of commute times must not be normal with mean 15 minutes and standard deviation 2 minutes are feasible conclusions.

Question 2

For a given data set and confidence level, the confidence interval of the population proportion p will be wider for 95 confidence than for 90 confidence.
  Indicate whether the statement is true or false

[scikid]

Answer to Question 1

D

Answer to Question 2

T

[SO00]

TYSM

[aliotak]

Gracias!