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Ierofanga [76]
3 years ago
12

Hypothesis testing on samples with fewer than 30 participants can be carried out by using the t-value for the corresponding leve

l of significance in place of the z value when setting up the decision rule.
a. True
b. False
Mathematics
1 answer:
Eva8 [605]3 years ago
3 0

Answer: true

Step-by-step explanation:

Z-tests are statistical calculations that can be used to compare the population mean to a sample mean The z-score is used to tellsbhow far in standard deviations a data point is from the mean of the data set. z-test compares a sample to a defined population and is typically used for dealing with problems relating to large samples (n > 30). Z-tests can also be used to test a hypothesis. Z-test is most useful when the standard deviation is known.

Like z-tests, t-tests are used to test a hypothesis, but a t-test asks whether a difference between the means of two groups is not likely to have occurred because of random chance. Usually, t-tests are used when dealing with problems with a small sample size (n < 30).

Both tests (z-tests and t-tests) are used in data with normal distribution (a sample data or population data that is evenly distributed around the mean).

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Refer to pictures help asap please
ratelena [41]

Answer:

x = 76.58°

Step-by-step explanation:

hyp = 13.41

tan = opp/adj

tan = 1/2 = 26.57

x = 76.58

4 0
3 years ago
4 days I have 140 copies of a book, 9 days I only have 50 left. Write an equation where c(t)=my+b where c is number of copies st
alexandr402 [8]

Answer:

c(t)=-18t+212.

Step-by-step explanation:

We have been given that 4 days I have 140 copies of a book, 9 days I only have 50 left. We are asked to write an equation c(t)=my+b, where c is number of copies still on hand and t days being available.

We have two points on line (4,140) and (9,50). Now, we will use these points to find slope as:

m=\frac{140-50}{4-9}

m=\frac{90}{-5}

m=-18

Now, we will use point-slope form of equation y-y_1=m(x-x_1) and substitute m=-18 and coordinates of point (9,50) as:

y-50=-18(x-9)

y-50=-18x+162

y-50+50=-18x+162+50

y=-18x+212

Therefore, our required equation would be c(t)=-18t+212.

5 0
3 years ago
What is the area of each triangle 24 ft 20 ft
arsen [322]

ANSWER

Area of triangle = b*h/2

24*20/2

24*10

The area of this triangle is 240 ft squared

Hope it helps :)

3 0
3 years ago
Eighty decreased by six times eight
Stells [14]
80-6×8= answer decrease is reduced..... does this help
8 0
3 years ago
Read 2 more answers
Write 4x = 1024 in logarithmic form. A) logx1024 = 4 B) log41024 = x C) logx4 = 1024 D) log10241024 = x
Step2247 [10]
<span>The answer would be B) log4 1024 = x

The logarithmic form can be explained as

</span>log_{A}<span> B=C   -----> A^C=B

Using </span>A^C=B to the question (4^x=1024) will result
A=4
B=1024
C=x

If you put the variable into logarithmic form
log_{A} B=C
log_{4} 1024= x
6 0
3 years ago
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