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Part I Exam Review Flashcards | StudBud
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Part I Exam Review
Part I Exam Review
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A #statistics quiz that reviews #ch1Bock
Flashcards
25 cards
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Practice quiz
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Questions
25
Answers
1
If 75% of all families spend more than $75 weekly for food, while 15% spend more than $150, what is the mean?
๐ = 118.52, ๐ = 56.26
๐ = 106.26, ๐ = 21.85
๐ = 83.33, ๐ = 12.44
๐ = 104.39, ๐ = 43.86
2
The amount of time required for 100 mice to navigate through a maze was recorded. Estimate the standard deviation.
20
10
50
2.5
3
Data was collected on 5000 adults.ย Which is most likely to be bimodal?
Number ofcigarettes smoked daily
Number of TV sets at home
Number of siblings
Eye color
4
Here are the summary statistics for the weekly payroll for Michael Scott Paper Company. What is the Q3?
$800
$1050
$950
$700
5
Fuel economy in MPG is normally distributed. If the Honda Civic Hybrid has a z-score of +2.9...
Gets 2.9 times the gas mileage of the average car
It gets 2.9 miles per gallon more than the average car
Has a fuel economy that is 2.9 st. devs better than average
Have a standard deviation of 2.9 mpg
6
The mean grade on an exam was a 72 with a stdev of 6. If the teacher adds a 10 pt curve...
The new mean is still 72 and the new StDev is 16
The new mean is 82 and the StDev is still 6
The mean is still 72 and the StDev is still 6
The new mean is 82 and the new StDev is 16
7
The stemplot displays the 1988 per capita income (in hundreds of dollars)ย of the 50 states. Shape?
Symmetric distribution, mean greater than median
Symmetric distribution, median equal to mean
Skewed distribution, median greater than mean
Skewed distribution, mean greater than median
8
If the mean grade on an exam is 72 with a StDev of 6, &the teacher multiplies all scores by 1.5
The new mean is 108 and the StDev is 9
The new mean and StDev could not be determined
The mean is still 72 and the StDev is still 6
The new mean is 108 and the stdev is still 6
9
How much does the CEO earn?
$225,750
$251,500
$189,000
$193,500
10
Which measure of center should be used if the data has outliers?
mode
median
mean
midrange
11
If the unmodified boxplot was switched to a modified boxplot, how many outliers would there be?
zero
one
at least one
at least two
12
Given the first type of plot, which of the following second plots could not always be generated from the first?
histogram --> stem plot
dot plot --> box plot
stem plot --> dot plot
dot plot --> histogram
13
In any data set, if you increase the frequency of the mean, what happens to the st. deviation?
It stays the same
It decreases
It increases
You cannot tell
14
What percentage of the labradors are male?
38.5%
none of these
61.5%
16.2%
15
The ogive below shows the heights (in cm) of 200 students. Approx the median height
210
172
186
160
16
The SPCA collects data on the dogs they house.ย Which of the following variables are categorical?
I, II and III
I and II
I and III
I only
17
Which data set(s) have the smallest standard deviation
A and B are equally small
B only
A and B and C are equally small
A only
18
Which has the larger mean and which has the larger standard deviation?
Largermean b; larger standard deviation b
Larger mean a; larger standard deviation b
Largermean a; larger standard deviation a
Largermean b; larger standard deviation a
19
Noise level (in decibels) in a restaurant is ~N(30,4). 99% of the time it is below what value?
33.4
20.7
37.8
39.3
20
What percent of Males had a Master's/Doctoral Degree?
24.6%
2.3%
4.6%
50%
21
The time for an iPhone to move through an assembly line is ~N(3.4, 0.5). What is the probability it takes 3 to 4 hrs?
0.3270
0.2295
0.6730
0.2119
22
Paulineโs SAT Math score was a 650 and her ACT Math score was a 27.ย Which score is more impressive?ย
SAT
It cannot be determined
They are equally impressive
ACT
23
Does the dogs' breed appear to be independent of the dogs' sex?
No
Yes
24
The histogram shows wait times for 175 patients at a dentist office. Estimate mean and median
mean = 9; median = 7
mean = 7; median = 9
mean = 8; median = 4
mean = 13; median = 11
25
What percentage of the dogs are male?
31.1%
17.9%
58.7%
41.3%
