Maths question pls answer
2 answers:
You might be interested in
Answer:
Evelyn monthly allowance is $187.
Step-by-step explanation:
Let the monthly allowance be 'x'.
Given:
Money taken with for shopping =
Money spent of dress = $39.95
Also Given:
3/7 of the remainder on some accessories.
Money spent on accessories is equal to times Difference of monthly allowance and Money spent of dress.
framing in equation form we get;
Money spent on accessories =
Also Given:
Money left after shopping = $30.60
Now we know that;
Money taken with for shopping is equal to sum of Money spent of dress and Money spent on accessories and Money left after shopping.
framing in equation form we get;
Combining like terms we get;
Now we will make denominator common using L.C.M
Hence Evelyn monthly allowance is $187.
Using the t-distribution, it is found that the correct option is:
0.005 < P-value < 0.01, reject the null hypothesis.
<h3>What are the hypothesis tested?</h3>At the null hypothesis, it is tested if the mean of a given population is equal to 85, that is:
We have a left-tailed test, hence, at the alternative hypothesis, it is tested if the mean of the population is less than 85, that is:
The test statistic is of t = -3.018.
Using a t-distribution calculator, with test statistic t = -3.018, 13 - 1 = 12 df and a significance level of 0.01, it is found that the p-value for a left-tailed test is of 0.0051.
The p-value is <u>less than 0.01</u>, hence the null hypothesis is rejected and the correct option is:
0.005 < P-value < 0.01, reject the null hypothesis.
More can be learned about the t-distribution at brainly.com/question/16313918