Answer:
Bee colonies are collapsing more frequently than before.
Explanation:
According to a different source, these are the options that come with this question:
Postal workers are getting bitten by bees more than ever.
His neighbors’ bees are destroying his colonies, which has never happened before.
Bees can no longer live in Northern Colorado.
Bee colonies are collapsing more frequently than before.
In this text, the author talks about a man called Michael Breed. Breed is a honeybee researcher at the University of Colorado. He tells us that, in the 35 years that he has been working with bees, he has noticed that bee colonies are collapsing more frequently than ever before. He gives several explanations for this situation, such as more parasites and infections due to climate change, loss of flower scent by pollution or a decreased ability to find a hive due to the use of pesticides.
Complete Question:
The mean life of a large shipment of CFLs is equal to 7,500 hours. The population standard deviation is 1,000 hours. A random sample of 64 CFLs indicate a sample life of 7,250 hours.
1. State the Null and Alternative Hypothesis.
2. At the 0.05 level of significance, is there evidence that mean life is different from 7,500 hours.
3. Construct a 95% confidence interval estimate of the population mean life of the CFLs.
4. Compute the p-value and interpret its meaning.
Answer:
-2, (7005, 7450), 0.045
Explanation:
1).
H₀: mean of life shipment is 7500 hours
the hypothesis are outlined as follows
H₀: 
7500
H₁: 
7500
where, n = 64, x = 7250, 
1000 hours
Test statistics:
Our conclusion from the above result is that there is sufficient evidence to say that the mean life is different from 7500 hours
2). 95% confidence Interval for the population mean 
is
![[7250-1.96\times \frac{1000}{\sqrt{64}},7250+1.96\times \frac{1000}{\sqrt{64}} ]\\\\(7005,7495)](https://tex.z-dn.net/?f=%5B7250-1.96%5Ctimes%20%5Cfrac%7B1000%7D%7B%5Csqrt%7B64%7D%7D%2C7250%2B1.96%5Ctimes%20%5Cfrac%7B1000%7D%7B%5Csqrt%7B64%7D%7D%20%5D%5C%5C%5C%5C%287005%2C7495%29)
3).
the p-value is given by
Answer:
2: 35 and 70
Explanation:
1. The LCM of 5 and 7: <em>35</em>
2. 35 * 2 = 70
3. 35 * 3 = 105, not 2-digit
So, the only 2-digit numbers that are multiples of both 5 and 7 are 35 and 70, so 2.
Answer:
B.Letter x
Explanation:
When these two lines cross, they make perpendicular lines. They are perpendicular because they cross at right angles to each other
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