z score = (1300-1700)/75
z score = -400/75 = -5.33
Answer:
1. A. how much of the students time is spent on social media during school hours.
B. By using some kind of selection technique Like Having students draw number from a hat, who ever have the specific numbers will take her survey.
C. The population for Sofies research would be a rate of 5/2. For every 5 people who take the survey only 2 turned it in.
D. She would conclude that 1 out of every 2 or 50 percent of students use social media while doing school work.
2. a) It helps to get accurate data or records of the information he wants to process and also is a direct way of carrying out analysis.
b) The students definitely might get distracted in the process of his observation and there fore render the data collection not as accurate as it will be for analysis.
c) The sample are the 10 students
The population are high school students
d) Tony 's conclusion will be 3 out of 10 looked at social media
thus 3/10 * 100 = 30 %
Step-by-step explanation:
Answer:
Direct Observation
Step-by-step explanation:
Some of the most common qualitative data collection techniques include open-ended surveys and questionnaires, interviews, focus groups, observation, case studies, and so on.
First you have to put them in order from least to greatest. so....
-52, -36, -36, -27, -23, - 17, -9, -8
mean: add all the numbers and divide them by 8(the total amounts)
mean: -208/8
mean: -26
median: number in the middle of a series
*since there is an even amount of numbers you have to get the two numbers that are in the middle, add them, and then divide them by 2.
median: -27 + (-23)
median:-50/2
median: -25
mode: number that appears most often or is repeated
mode: -36
range: difference between the lowest and highest value
range: -52 - (-8)
range: -44
hope this helps and have a great day :)
I think the answer is y = .38
