Pls, can someone help me with this problem?
1 answer:
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The ostrich can run 20 miles in 40 minutes.
<u>Solution:</u>
Given that, An ostrich run 6 mile in 12 minutes
We have to find how far he could come in 40 minutes
Now, according to the given information
Ostrich runs 6 miles ⇒ 12 minutes
Then, “n” miles ⇒ 40 minutes
Now, by criss cross multiplication we get,
Hence, the ostrich can run 20 miles in 40 minutes
Answer:
We conclude that the the touch therapists does not use a method equivalent to random guesses.
Yes, the results suggest that touch therapists are effective.
Step-by-step explanation:
We are given that in a 9-year-old girl did a science fair experiment in which she tested professional touch therapists to see if they could sense her energy field.
Among 264264 trials, the touch therapists were correct 105105 times.
<u><em>Let p = proportion that touch therapists uses a random guess method.</em></u>
Here, random guess means; p = 50%
So, Null Hypothesis, : p = 50% {means that the touch therapists use a method equivalent to random guesses}
Alternate Hypothesis, : p
50% {means that the touch therapists does not use a method equivalent to random guesses}
The test statistics that would be used here <u>One-sample z proportion statistics</u>;
T.S. = ~ N(0,1)
where, = sample proportion of touch therapists were correct =
= 0.39
n = sample of trials = 264
So, <em><u>test statistics</u></em> =
= -3.395
The value of z test statistics is -3.395.
<em>Now, at 0.05 significance level the z table gives critical value of -1.96 and 1.96 for two-tailed test. Since our test statistics does not lie within the range of critical values of z, so we have sufficient evidence to reject our null hypothesis as it will in the rejection region due to which </em><u><em>we reject our null hypothesis</em></u><em>.</em>
Therefore, we conclude that the the touch therapists does not use a method equivalent to random guesses.
Yes, the results suggest that touch therapists are effective.