PLEASE HELP!! (GIVING BRAINLIEST TO FIRST CORRECT ANSWER<br><br> explain how you do it!!

According to the norms established for a reading comprehension test, eighth-graders should average 83.2 with a standard deviatio

joja [24]

Answer:

$t=\frac{86.7-83.2}{\frac{8.6}{\sqrt{45}}}=2.73$

$p_v =P(t_{44}>2.73)=0.0045$

If we compare the p value and a significance level given $\alpha=0.01$ we see that $p_v$ so we can conclude that we have enough evidence to reject the null hypothesis, so we can conclude that the population mean is signficantly higher than 83.2 at 1% of significance.

Step-by-step explanation:

Data given and notation

$\bar X=86.7$ represent the average life for the sample

$s=8.6$ represent the population standard deviation

$n=45$ sample size

$\mu_o =83.2$ represent the value that we want to test

$\alpha=0.01$ represent the significance level for the hypothesis test.

t would represent the statistic (variable of interest)

$p_v$ represent the p value for the test (variable of interest)

State the null and alternative hypotheses.

We need to apply a two tailed test.

What are H0 and Ha for this study?

Null hypothesis: $\mu \leq 83.2$

Alternative hypothesis : $\mu > 83.2$

Compute the test statistic

The statistic for this case is given by:

$t=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}$ (1)

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".

Calculate the statistic

We can replace in formula (1) the info given like this:

$t=\frac{86.7-83.2}{\frac{8.6}{\sqrt{45}}}=2.73$

Give the appropriate conclusion for the test

First we need to calculate the degrees of freedom given by:

$df=n-1=45-1=44$

Since is a one side right tailed test the p value would be:

$p_v =P(t_{44}>2.73)=0.0045$

Conclusion

If we compare the p value and a significance level given $\alpha=0.01$ we see that $p_v$ so we can conclude that we have enough evidence to reject the null hypothesis, so we can conclude that the population mean is signficantly higher than 83.2 at 1% of significance.

8 0

3 years ago

If you miss a payment for a bill, how do you compute the interest due on the next bill?

Vladimir79 [104]

Answer:

Late fees can only be as high as your minimum payment or $25

Example

it’s the 15th day of the month and you realize you didn’t make the credit card payment that was due three days ago on the 12th. Or, you check your billing statement to find a late fee for a payment you thought you made but turns you forgot to drop the check in the mail. An accidentally missed payment can happen to anyone. Act quickly and you may be able to lessen the damage.

Make the payment as soon as you can

If you catch the missed payment a few days after the due date, make it up before your next billing statement comes. Doing this will prevent a late payment being reported to the credit bureaus. Creditors report typically report delinquent payments once they become at least 30 days late, so make your payment before your delinquency reaches the 30-day mark.

When you go through a period of financial difficulty, your bill-paying problems — specifically, payments made late or missed altogether — will show up on your credit record and hurt your credit rating.

As soon as you miss a payment or know that you’re going to miss one, call your lender. Doing so may help minimize the damage to your credit rating and can help avoid collection calls.

Check your account online and you’ll probably see that a late fee has already been added; some card issuers add the late fee just minutes after the cutoff time on your due date. Late fees can only be as high as your minimum payment or $25, assuming you haven’t been late in the previous six months. Despite the recent cap on late fees, you still want to avoid the fee if you can and you should definitely try.

Many creditors are willing to waive a late fee as long as you’re not habitually late on payments. Contact your creditor, briefly explain how the missed payment was an accident, and ask that your late fee is waived. If your creditor won’t budge on the fee, don’t press the issue. Simply take it as a lesson learned, pay the fee, and be sure to send your payment on time next month and every month thereafter.

6 0

3 years ago

Read 2 more answers

a man has 25 coins in his pocket all of which are dimes and quarters. if the total value of his change is 430 cents, how many di

valentinak56 [21]

Answer:16 quarters and 3 dimes

Step-by-step explanation:

430/25 (Quarters) = 17

25x16

(Because you can’t have 17 since 25x17=425 leaving no room for dimes.)

=400

Now 430-400=30

30 more cent is needed,

30/10(Dime value)

Is 3, so the answer is the man has 16 quarters and 3 dimes

7 0

3 years ago

Help on number 6 i don't understand how to do it and i got corrections so i need help to do them.

Mademuasel [1]

The answer #6 is j. 100. He uses the treadmill for 40% so that means 60% of his exercise is not on the treadmill.

40%= 40 mins
60%= 60 mins
total: 100%= 100 mins.
Hope this helps!

8 0

3 years ago

Read 2 more answers

Convert the repeating decimal to a fraction

lilavasa [31]

17. 2/3
18. 1 1/9
20.9 1/11
21. 2 909/100 (closest i could get)
Hope I helped and hope you had a good day!

6 0

3 years ago

PLEASE HELP!! (GIVING BRAINLIEST TO FIRST CORRECT ANSWER explain how you do it!!