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2 answers:
Answer:
a. -0.1 < x - 10 < 0.1
b. 9.9 < x < 10.1
c. see attached image
d. Long bolts must fall within margin of error of less than 0.1 so it can be any length greater than 9.9 mm and less than 10.1 mm.
Step-by-step explanation:
-0.1 < x - 10 < 0.1
-0.1 < x - 10 and x - 10 < 0.1
9.9 < x x < 10.1
Can be written as 9.9 < x < 10.1
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Answer:
a) Mean=0 and Standard deviation=1
b) The z-scores have no units of measurement
Step-by-step explanation:
When we convert all the pulse rates of women to z-scores using the formula;
the mean is 0 and the standard deviation is 1.
The reason is that, the resulting distribution of z-scores forms a normal distribution which has a mean of 0 and a standard deviation of 1.
b) The z-scores are standardize scores and has no units of measurement. They give us how many standard deviations below or above the mean of the corresponding values.
Answer:
The table is attached!
Step-by-step explanation:
- 6 students play both musical instrument and a sport
- 3 students play neither a musical instrument nor a sport
- 14 students in total play a sport
Given: There are 24 students in the class
The number of students that does not play a sport is 24 - 14 = 10
The number of students that does not play a musical instrument but play a sport = 14 - 6 = 8
The frequency table thus is attached below:
Answer:
A
The test statistics is
B
The Null and Alternative hypothesis are
and
Step-by-step explanation:
From the question we are told that
The population mean is
The sample size is
The sample mean is
The sample standard deviation is
The level of significance is
Given that the value which the manufacturer gave the automobile is 47.2 and it is believed that this is not correct, then
The Null Hypothesis is
The alternative Hypothesis is
The test statistics can be mathematically evaluated as
substituting values