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Norma-Jean [14]

2 years ago

14

PLEASE ANSWER FAST TIMED TEST

1 answer:

Anon25 [30]2 years ago

8 0

Answer:

0.0000015

Step-by-step explanation:

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Original amount: 27<br> End amount: 38.61<br><br> Increase or decrease

vichka [17]

Answer:

increase

Step-by-step explanation:

11.61 was added to 27

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2 years ago

Need answer ASAP plz

Oksana_A [137]

Answer:

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2 years ago

It is advertised that the average braking distance for a small car traveling at 65 miles per hour equals 122 feet. A transportat

madreJ [45]

Complete Question

The complete question is shown on the first uploaded image

Answer:

the null hypothesis is $H_o : \mu = 122$

the alternative hypothesis is $H_a : \mu \ne 122$

The test statistics is $t = - 1.761$

The p-value is $p = P(Z < t ) = 0.039119$

so

$p \ge 0.01$

Step-by-step explanation:

From the question we are told that

The population mean is $\mu = 122$

The sample size is n= 38

The sample mean is $\= x = 116 \ feet$

The standard deviation is $\sigma = 21$

Generally the null hypothesis is $H_o : \mu = 122$

the alternative hypothesis is $H_a : \mu \ne 122$

Generally the test statistics is mathematically evaluated as

$t = \frac { \= x - \mu }{\frac{ \sigma }{ \sqrt{n} } }$

substituting values

$t = \frac { 116 - 122 }{\frac{ 21 }{ \sqrt{ 38} } }$

$t = - 1.761$

The p-value is mathematically represented as

$p = P(Z < t )$

From the z- table

$p = P(Z < t ) = 0.039119$

So

$p \ge 0.01$

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2 years ago

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Brut [27]

The answer is B. I hope this helped.

6 0

3 years ago