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WorksheetsNormal and Sampling Distribution
Total questions: 15
Worksheet time: 30mins
If the value we are looking for is smaller than the mean, the value of z is:
Not enough information
Negative
Positive
0
If the value we are looking for is the same as the mean, the value of z is:
Not enough information
Positive
Negative
0
Which statement is valid?
None of the options
Probability = -0.89
Probability = 1.89
Probability = 1
Z=0.27.
What's the probability of the gray area?
(Mean = 55, Standard dev = 2.5)
0.8185
0.8413
0.8641
0.8389
Which of the following symbol describes the population mean?
μ
n
xˉ
σ
What is the mean of the sampling distribution?
According to the Central Limit Theorem, For a sample to be large enough, the sample size should be ______.
half of the population
75% of the population size
at least 30
at most 100
Consider a population with μ=50 and σ=5 is taken. Find the standard deviation of the sampling distribution of the sample mean with a sample size of 30.
5
0.91
0.71
0
4,5,5,2,3,3,2,8
28, 18, 19, 18, 17
You want to know the favorite sport of middle school students. Which group would provide the best random sample?
Every tenth person who enters the stadium before a football game.
Every fifth person who leaves the school building at the end of the school day.
the girls' soccer team
the band students
In a large survey of cat owners, 82,603 had one cat, 11,894 had two cats, 2,349 had three cats, and 421 had four cats. Approximate the mean number of cats owned by people in this survey.
1.2
1.0
1.5
1.8
Terrance's homework grade was a 72, his project grade was an 80 and his exam grade was an 82. Homework is worth 10% of the final grade, the project was worth 50%, and the exam was worth 40%.
What was Terrance's final grade?
80
78
82
76
