At a high school with over 500 students, a counselor wants to estimate the mean number of hours per week that students at the sc

Question

2 years ago

8

At a high school with over 500 students, a counselor wants to estimate the mean number of hours per week that students at the sc

hool spend in community service activities. The counselor will survey 20 students in the Environmental Club at the school. The mean number of hours for the 20 students will be used to estimate the population mean.Which of the following conditions for inference have not been met?1. The data are collected using a random sampling method.2. The sample size is large enough to assume normality of the distribution of sample means.3. The sample size is less than 10 percent of the population size. A. II onlyB. III onlyC. II and III onlyD. I, II, and III

Mathematics

2 answers:

Rashid [163] · Answer 1 · 2023-06-02T12:33:52+03:00

Rashid [163]2 years ago

6 0

Answer: **********D***********

Step-by-step explanation:

I. SRS is not stated.

II. 20 is less than 30, so we can't assume normality.

<h2>You're welcome!</h2>

mote1985 [20] · Answer 2 · 2023-06-02T10:42:29+03:00

Answer:

Step-by-step explanation:

The sample size is just 20. This is small. The sample size should be at least 30

Also, a good maximum sample size should be less 10% of the population. By checking,

10/100 × 500 = 50

This condition is met

Therefore, the conditions for inference that have not been met is

The sample size is large enough to assume normality of the distribution of sample means.

The correct option is

A. II only