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2 years ago

Which statements are true?

Mathematics

1 answer:

Gwar [14]2 years ago

3 0

See the attached picture:

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

$p \ge 0.01$

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

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

$p \ge 0.01$

4 0

2 years ago

StatTutor: Population versus sample Officials of a major university want to know what percent of their students recycle paper. T

love history [14]

Answer:

Whether the student recycle the paper or not.

Step-by-step explanation:

We are given the following in the question:

Officials of a major university want to know what percent of their students recycle paper.

A random sample of sample size 200 is taken.

We have to find the variable that is measure on each student of the sample.

Variable of measurement on each student:

Whether the student recycle the paper or not.

The student will reply a yes or no as an answer.

3 0

2 years ago

Assume current Federal Exemption is $3300.00. Bill Smith earns $37,500.00, is single; and the tax rate is 2 3/4 %. Calculate the

MatroZZZ [7]

Tax rate is 2+3/4=2.75%
Income taxable
37,500−3,300=34,200
Tax accrued
34,200×0.0275=940.5

3 0

2 years ago

Help me, solve for x

jekas [21]

Answer:

Step-by-step explanation:

108 + 11x + 6 = 180

11x = 180-114

11x=66

hope it helps:)

5 0

2 years ago

Read 2 more answers

Cuál lugar es más burro tu eres más burro no importa para nada se espera nada escapes burro no sirve para nada x musique

34kurt

Answer:

no se perdon

Step-by-step explanation:

7 0

2 years ago