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erma4kov [3.2K]
2 years ago
15

According to a survey, the average American person watches TV for 3 hours per week. To test if the amount of TV in New York City

is less than the national average, a researcher decides to do a hypothesis test, at a 10% significance level. She surveys 26 New Yorkers randomly and asks them about their amount of TV each week, on average. From the data, the sample mean time is 2.5 hours per week, and the sample standard deviation (s) is 1.1 hours. H0: μ≥3; Ha: μ<3. α=0.1 (significance level) What is the test statistic (t-value) of this one-mean hypothesis test (with σ unknown)? Round your final answer to two decimal places. Provide your answer below:
Mathematics
2 answers:
Ne4ueva [31]2 years ago
5 0

Answer:

-1.32

Step-by-step explanation:

Since we want to test if \bf \mu of the alternative hypothesis is less than the established in the null, this is a left-tailed test.

<em>At 10% significance level the t-statistic (t-value) is the value of t such that the area under the Student's t-distribution curve with 25 degrees of freedom (sample size -1) to the left of  t equals 10% = 0.1 </em>

Either by using a table or the computer, we find  

\bf t= -1.316\approx -1.32

butalik [34]2 years ago
4 0

Answer:

t=2.32

Step-by-step explanation:

t-value= (population mean-sample mean)/√ (sample SD²/sample size)

t= (3-2.5)/√(1.1²/26)

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Figure S was drawn first and figure T was drawn second. What is the scale factor?
Morgarella [4.7K]

Answer:

The answer would be B

Step-by-step explanation:

All you have to do is multiply to see what its multiplied by to get the sizes of T Which is all by 4 so your answer is B

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2 years ago
A train traveled 450 kilometers (450 km) east from its starting point for 9 hours (9 h). What was the average speed of the train
elixir [45]

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Step-by-step explanation:

4 0
3 years ago
In the diagram below qs and pt are altitudes and m r=55 what is m poq
guapka [62]

Answer: POQ = 125

Step-by-step explanation: If you don’t want to read my long explanation, I drew a diagram of my work. :>

First we need to establish that POQ is a vertical angle to SOT, this makes the angles equal. We also need to establish that because the definition of an altitude, that T And S both form right angles. (An altitude is a perpendicular segment from a vertex of a triangle to the opposite side.) Now let’s take a look at the quadrilateral that is formed inside the triangle, the quadrilateral being RSOT. Luckily we know the measure of three of the angles, R=55, T=90, and S=90. If you didn’t know beforehand all angles of a quadrilateral add up to 360, so we can add up the angles we’ve already found to find the missing angle O/ SOT. When we add the angles, and then subtract that from 360 we get 125, so SOT=125. Remember that we established that SOT and POQ are vertical angles, so if SOT=125 then POQ=125.

I really hoped my explanation was good, this was my first time giving an answer. Also I’m sorry if my method of finding the answer wasn’t helpful, but this was the only way I could think of.

I accidentally gave myself a one star rating, that sucks.

5 0
2 years ago
I need the answer ASAP!
Rudik [331]
Put your finger on the zero and go 5 blocks to the right the go up 14 blocks then mark it with a point ฅ^•ﻌ•^ฅ
5 0
3 years ago
الأولى متوسط
zaharov [31]
yep yep yep yep yep yep
3 0
3 years ago
Read 2 more answers
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