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AP Stats Project (Prathi & Sofia)
AP Stats Project (Prathi & Sofia)
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1
Melanie takes a sample of 50 songs and finds 30 are made by a female artist. Find a 99% CI for songs made by a woman.
0.6\pm1.96\sqrt{\frac{0.6\left(0.4\right)}{50}}
30\pm2.576\sqrt{\frac{0.6\left(0.4\right)}{50}}^{ }
0.6\pm2.576\sqrt{\frac{0.6\left(0.4\right)}{50}}
30\pm1.96\sqrt{\frac{0.6\left(0.4\right)}{50}}
2
Which of the following is a correct interpretation of the interval?
The probability is 0.95 that the difference in pop. means is (7.29,15.75)
We are 95% confident that the difference in sample means is (7.29,15.75)
We are 95% confident that the difference in pop means is (7.29,15.75)
The probability is 0.95 that the difference in sample means is (7.29,15.75)
3
How would you describe this graph?
Skewed left
Symmetric
Bimodal
Skewed right
4
The measure of the likelihood of an event to happen is:
SRS
Statistics
Probability
Calculus
5
Which of the following is a simple random sample?
15 out of 150 student names are chosen from a hat to complete a survey
Find a school roster with names in A-Z order and choose the first 15 people
Number people in your school from 001-150 and use a RNG to choose 15 people
Choose 15 of your close friends to complete the survey.
6
Which of the following statements are true?
I only
I and II
I and III
III only
7
Which of the following is equal to the expected count of people less than 10mi from the gym + exercise 4 times a week?
8
12
\frac{\left(47\right)\left(22\right)}{96}
\frac{\left(49\right)\left(22\right)}{96}
8
Which is an appropriate alternative hypothesis in this study for a chi-square test for homogeneity of disease response?
There is an association between disease status and treatment.
There is no difference in disease status across the 4 different treatments.
There is no association between disease status and treatment.
There is a difference in disease status across the 4 different treatments.
9
p̂ is used to represent a population ration of successes to failures
True
False
10
Are there any outliers in the data set: 84, 88, 72, 74, 98, 16, 94
Yes, 98
No outliers
Yes, 16
Yes, 84
11
Olivia performs a test to find out the proportion of students who eat breakfast with 90% confidence. Critical value?
z* = 1.96
z* = 1.282
z* = 1.645
z* = 2.576
12
What percent of values are within 3 standard deviations of the mean?
68%
99.7%
34%
49.9%
13
A population is:
Any characteristic who value changes
Observations on single or multi-variables
A subset of the population selected for study.
An entire collection of individuals or objects
14
A coin is tossed three times. What is the probability that it lands on heads
exactly
one time?
0.250
0.125
0.333
0.375
15
Approximate mean of values: 20, 34, 77, 68, 42
42
77
49
48
16
Based on the histogram, what is the probability that at least 4 of the next 5 flights at the airline will be overbooked?
0.526
0.465
0.874
0.339
17
Which represents categorical data?
Height
MPH
Weight
Favorite Food
18
The smaller alpha level
Provides stronger evidence
Small significance level
More likely to reject the null hypothesis
Smaller mean
19
Interview every 10th student who enters the school in the morning. This is:
Convenience
Cluster sample
SRS
Systematic sample
20
Which of the following is the best graph to evaluate the appropriateness of the model?
A histogram
A residual plot
A dotplot
A boxplot
21
A random sample of 300 shoppers was selected for a survey. What is the maximum margin of error if a 90% CI is made?
0.0366
0.0475
0.0259
0.0773
22
When the probability of one event occurring is not affected by the knowledge that the other event has occurred:
Dependent
Independent
23
What does μ mean?
Population mean
Standard deviation
Mean
Sample mean
24
You draw two candies at random from a jar that has 20 red & 30 blue without replacement. Probability both are red?
0.4444
0.160
0.1551
2/3
25
There are 5317 prev owned homes sold in 2017. The home sales prices have a mean of $206274 and standard dev of $37881.
Mean of $206,274 and a standard deviation of $37,881
Mean of $206,274 and a standard deviation of $3,788
Mean of $37,881 and a standard deviation of $206,274
Mean of $37,881 and a standard deviation of $206,274
