5/8 - 3/4(8 - 1/3) + 1

Mathematics

2 answers:

Anon25 [30]3 years ago

6 0

The answer is definitely -4 1/8

Anastaziya [24]3 years ago

5 0

The answer is -4.125 hope I helped!!

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A customer service phone line claims that the wait times before a call is answered by a service representative is less than 3.3

8_murik_8 [283]

Answer:

Step-by-step explanation:

Let x be the wait times before a call is answered in phone calls.

The claim is x bar <3.3 minutes

Sample size n =62

Sample mean - x bar = 3.24 minutes

Population std dev = $\sigma = 0.40 minutes\\$

Since population std dev is known and also sample size is sufficiently large, we can use Z test.

$H_0: x bar = 3.3\\H_a: x bar$

(one tailed test)

Mean difference = 3.24-3.3 = -0.06 min

Std error of sample = $\frac{\sigma}{\sqrt{n} } =\frac{0.40}{\sqrt{62} } \\=0.0508$

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Since p value > alpha, we accept null hypothesis.

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3 years ago

A store manager wishes to investigate whether there is a relationship between the type of promotion offered and the number of cu

alekssr [168]

The answer would be
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If you want please mark BRAINLIEST.!
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3 years ago

60 points and brainlyiest!! Hurry

sergiy2304 [10]

Dude it’s. 5 points

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3 years ago

Read 2 more answers

Which expression is undefined?

Olenka [21]

The answer has to be letter A .

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