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Ivahew [28]
3 years ago
7

The mean length a particular species of fish should be 9.7 inches. the supervisor of a fish hatchery measures the length of a si

mple random sample of the fish every week after hatching to track their growth. if their average length is too short or too long, they are not maturing properly and further tests must be done to determine the cause. she randomly selects 30 fish from those hatched five weeks ago and observes a mean length of 10.1 inches and a standard deviation of 1.8 inches. the value of the test statistic is ________. (give the answer rounded to 2 decimal places.)
Mathematics
1 answer:
sp2606 [1]3 years ago
8 0

A test statistic is a parameter used during a hypothesis test to determine whether to accept or reject the null hypothesis. There are 2 test statistics, the z-score and t-score. The main difference is that the t-score is used when sample size is not greater than 30. Therefore we will use the t-score in this case.

The formula for t-score is:

t-score = (x – μ<span>) / (s / sqrt n)               -----> equation 1</span>

Where,

x = sample mean = 10.1

μ = population mean = 9.7

s = sample standard deviation = 1.8

<span> n = sample size = 30</span>

Substituting the given values in equation 1:

t-score = (10.1 – 9.7) / (1.8 / sqrt(30))

t-score = 1.22

<span>Answer: The test statistic is 1.22.</span>

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Illusion [34]

Answer:

-7/30

Step-by-step explanation:

So you need to make the denominators the same number so that you can just subtract the numerators.

(10) 2/3 - (3) 9/10

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6 0
3 years ago
In how many different ways can 10 be written as a sum of odd numbers
kakasveta [241]
5+5=10
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Hope this Helps!
7 0
3 years ago
PLS BELP IM JUST CONFUSED
Ganezh [65]

Answer:

(0, 3)

Step-by-step explanation:

The y-intercept of any function can generally be defined as: (0, f(0)), since the y-intercept is when the function crosses the y-axis.

Anywhere on the y-axis, the x-value = 0, so the x value of the y-intercept will always be 0, and the y value is f(0), since x=0.

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4 0
1 year ago
8 is the difference of d and 3.75
maria [59]

Answer:

11.75

Step-by-step explanation:

From the question above 8 is the difference of d and 3.75

We are required to find the value of d

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Hence the value of d is 11.75

7 0
2 years ago
Help please!!! I only have 10 minutes!!
goblinko [34]
I think 0.7 would be it
3 0
3 years ago
Read 2 more answers
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