Answer:
The correct option is B) 0.0228
Step-by-step explanation:
Consider the provided information.
The manager of a grocery store has taken a random sample of 100 customers. The average length of time it took the customers in the sample to check out was 3.1 minutes. The population standard deviation is known to be 0.5 minute.
Thus, the value of n = 100, 
and σ = 0.5
We want to test to determine whether or not the mean waiting time of all customers is significantly more than 3 minutes.
The null and alternative hypotheses are,
and 
Compute the test statistic 
By using the table.
P value = P(Z>2) = 0.0228
Hence, the correct option is B) 0.0228
Answer:
A. Translate the pre-image down 4 and right 3 and then reflect the figure over the x-axis
Step-by-step explanation:
The data points in the data set with the higher standard deviation are, in other words, the data points in the data set with the larger standard deviation are more dispersed; each.
- Similar standard deviations between two data sets indicate that the variability between the two data sets relative to each data set's mean is similar.
- In other words, the data are distributed equally. The data set with the higher standard deviation has more variability if the standard deviations are different. For the data set, measurement and mean agree more closely.
Learn more about standard deviation here: brainly.com/question/13905583
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Answer:
3/2
Step-by-step explanation:
The ratio of males to females in a cycling club is 5:3.
1/3 of the males are under 18
2/9 of the females are under 18
The fraction of the club members that are under 18 is calculated as:
Male: Female = Male/Female
We are told in the above question:
1/3 of the males are under 18
2/9 of the females are under 18
Hence:
1/3 / 2/9
= 1/3 ÷ 2/9
= 1/3 × 9/2
= 3/2
The fraction of the club members that are under 18 is 3/2
