Vocabulary
Sampling and Bias
Empirical Rule
various
Data
100
A study is being done to find the mean number of fortnite "dubs" JCHS students have. Is this a statistical question?
yes
100
AMC surveyed all the customers in theater 1 and 5 on their movie experience. What type of sampling did they do? Is this sampling method bias?
Cluster No
100
What are the 3 percentages used in the Bell Curve/ Empirical Rule?
68, 95, 99.7
100
If the value is 67, the standard deviation is 3 and mu = 76. Find the z-score
- 3
100
For the data 54,63,71,79,86,88,92,94,96,100 find the mean. Nearest tenth.
82.3
200
A study is being done to find the mean number of fortnite "dubs" JCHS students have. If all seniors are surveyed, what is the population and what is the sample?
population = JCHS students
sample= seniors
200
Every 10th login to the NBA 2k online game has the gamer engage with a survey. What kind of sampling technique is this? Is this sampling method bias?
Systematic No
200
what does the center line represent?
the mean, the median and the mode
200
If the standard deviation is 23 and sample size is 67. Find the margin of error.
+ - 5.6
200
For the data 54,63,71,79,86,88,92,94,96,100 find the standard deviation. Nearest tenth.
15.2
300
A study is being done to find if JCHS student's like fortnite. What type of statistical variable is collected?
categorical
300
Everyone is asked to write down on a slip of paper which type of phone he or she has and drop it in a bucket. What type of sampling is this? Is this type of sampling bias?
Self selective Yes
300
If the mean of a standardized test with a normal distribution is 54.3 and the standard deviation is 4.6, what is the value of 2 standard deviations above the mean.
63.5
300
If 600 people are surveyed and 454 are democrats, Find the sample proportion. No decimals.
76%
300
For the data 54,63,71,79,86,88,92,94,96,100 find the five number summary and the inter-quartile range.
54 71 87 94 100 23
400
A study is being done to find the mean number of fortnite "dubs" JCHS students have. We learn that the mean is 3, is this a statistic or a parameter?
Parameter
400
What type of data gathering is described as an equal number of samples being taken from each group? Is this sampling method bias?
Stratified No
400
On a standardized test with normal distribution. The mean is 75 and the standard deviation is 6. What is the value of 3 standard deviations below the mean?
57
400
If you watch how many people wash their hands before leaving the restroom. What type of study is this?
Observational
400
For the data 54,63,71,79,86,88,92,94,96,100 what best describes the center and the spread
median and IQR
500
A study is being done to find the mean number of fortnite "dubs" JCHS students have. If we ask the students a question, what type of study is this?
Sample survey
500
You are gathering data to determine the probability that a random person considers himself or herself a sports fan. To collect data, you ask the first 20 people you see in town. What type of sampling method is used? Is this method sampling bias?
Convienence Yes
500
A normally distributed set of values has a mean of 103 and a standard deviation of 12. What is the interval for the 95 % range of scores?
79-127
500
If you have 20 sick patients and you give 10 real meds and 10 fake meds and count how many get well, what type of study is this? what are the two groups called? what is the fake meds called?
Experimental Study, control and experiment, placebo
500
For the data 54,63,71,79,86,88,92,94,96,100Is the distribution normal skewed right or skewed left?
Skewed left