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pashok25 [27]
3 years ago
11

Answers anyone will give thanks and brainliest answer

Mathematics
1 answer:
weeeeeb [17]3 years ago
5 0
3. A 4.B 5.B Very happy to help you!
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A local retailer claims that the mean waiting time is less than 8 minutes. A random sample of 20 waiting times has a mean of 6.3
rusak2 [61]

Answer:

The claim is not true

Step-by-step explanation:

We are given that A local retailer claims that the mean waiting time is less than 8 minutes.

H_0:\mu=8

H_a:\mu

A random sample of 20 waiting times has a mean of 6.3 minutes with a standard deviation of 2.1 minutes.

\bar{x}=6.3

s = 2.1

n = 20

Since n <30 and population standard deviation is unknown

So,we will use t test

So,t=\frac{x-\mu}{\frac{s}{\sqrt{n}}}

t=\frac{6.3-8}{\frac{2.1}{\sqrt{20}}}

t=-3.62

α = 0.01

Degree of freedom = df=n-1=20-1=19

t_{df,\frac{\alpha}{2}}=t_{19,\frac{0.01}{2}}=2.861

t calculated < t critical

So, we failed to reject null hypothesis

Hence the claim is not true

8 0
4 years ago
Find the mean of the following set of data. Round your answer to two decimal places.23, 50, 49, 48, 49, 32, 37, 40, 41, 42, 41,
tekilochka [14]
Mean is adding all of the values and then dividing them by the number of values there are. Your answer should be 41.23 if my math lacks errors. Hope it helps!
4 0
3 years ago
- A teacher wanted to determine the effectiveness of two different learning tools—a computer program or a hands-on approach—for
Jlenok [28]

Answer:

The answer is Computer Experience.

Step-by-step explanation:

6 0
4 years ago
Find the slope of the line.
Delicious77 [7]
The slope is 2 because after u use the slope formula u get 4/2 which reduces to 2
6 0
3 years ago
Rewrite the formula f=ma , get m by itself
Anna007 [38]
F=ma
f/a = ma/a
f/a = m
3 0
3 years ago
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