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Dmitriy789 [7]
2 years ago
9

The health of the bear population in Yellowstone National Park is monitored by periodic measurements taken from anesthetized bea

rs. A sample of 54 bears has a mean weight of 182.9 lb. Assuming that σ is known to be 121.8 lb, use a 0.05 significance level to test the claim that the population mean of all such bear weights is greater than 150 lb. Find P and state the conclusion.
A. 0.0239, fail to reject
B. 0.9761, reject the null hypothesis
C. 0.9761, fail to reject
D. 0.0239, reject the null hypothesis
Mathematics
2 answers:
777dan777 [17]2 years ago
8 0
I think it’s C I really don’t know
horrorfan [7]2 years ago
6 0

Answer:

0.0239; reject the null hypothesis

Step-by-step explanation:

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The amount of time required to reach a customer service representative has a huge impact on customer satisfaction. Below is the
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Answer:

The value of the test statistic is t=1.12.

Step-by-step explanation:

This is a hypothesis test for the difference between populations means.

The claim is that the mean amount of time required to reach a customer service representative significantly differs between the two hotels.

Then, the null and alternative hypothesis are:

H_0: \mu_1-\mu_2=0\\\\H_a:\mu_1-\mu_2\neq 0

The sample 1, of size n1=20 has a mean of 2.65 and a standard deviation of √2.952=1.72.

The sample 2, of size n2=20 has a mean of 2.01 and a standard deviation of √2.952=1.89.

The difference between sample means is Md=0.64.

M_d=M_1-M_2=2.65-2.01=0.64

The estimated standard error of the difference between means is computed using the formula:

s_{M_d}=\sqrt{\dfrac{\sigma_1^2+\sigma_2^2}{n}}=\sqrt{\dfrac{1.72^2+1.89^2}{20}}\\\\\\s_{M_d}=\sqrt{\dfrac{6.531}{20}}=\sqrt{0.327}=0.571

Then, we can calculate the t-statistic as:

t=\dfrac{M_d-(\mu_1-\mu_2)}{s_{M_d}}=\dfrac{0.64-0}{0.571}=\dfrac{0.64}{0.571}=1.12

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2 years ago
Given the graph below, find PQ
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Answer:

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Step-by-step explanation:

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40×39×38= 59280
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fredd [130]

Answer:

All in all, Jonathan's piggy bank contains 100 coins. Among these coins, only 50 are one-dollar coins. Therefore, the theoretical probability of picking one-dollar coin from the piggy bank is equal to 50/100 or 1/2.  

Similarly, from the experiment, 20 coins were picked and among these there are 12 one-dollar coins. The answer to the second question is therefore 12/20 or 3/5.

Step-by-step explanation:

4 0
2 years ago
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Answer:

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Step-by-step explanation:

Given

1kg = P55

Required

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Representing this as a function:

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