Mathematics: Jenny decided to design her very own experiment from scratch. She created her hypothesis and gathered her materials. She did not have time to write down her steps. Instead, she kept the details in her memory. Which of the following requirements is missing from the procedures in this experiment?

Jenny decided to design her very own experiment

Brock2002

03.02.2022

The answer is procedures.

Step-by-step explanation:

Without procedures no one will know exactly how she did her experiment.

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KittyLitty

03.02.2023

The P-value for this test is P=0.2415.

Step-by-step explanation:

We have to perform an hypothesis testing on the mean of alla account balances.

The claim is that the mean of all account balances is significantly greater than $1,150.

Then, the null and alternative hypothesis are:

$H_0: \mu=1150\\\\H_a: \mu1150$

The sample size is n=20, with a sample mean is 110 and standard deviation is 125.

We can calculate the t-statistic as:

$t=\dfrac{\bar x-\mu}{s/\sqrt{n}}=\dfrac{1170-1150}{125/\sqrt{20}}=\dfrac{20}{27.95}=0.7156$

The degrees of freedom fot this test are:

df=n-1=20-1=19

For this one-tailed test and 19 degrees of freedom, the P-value is:

P-value=P(t0.7156)=0.2415

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