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3 years ago

A Paired t-Test reduces to the case of hypothesis test on a mean, variances unknown. A. True B. False

Mathematics

1 answer:

WINSTONCH [101]3 years ago

8 0

Answer:

A. True

Step-by-step explanation:

A paired T- test is also sometimes called the dependent sample t-test. It may be defined as a statistical procedure that is mainly used to determine if the mean variance between the two samples or units of the observations are zero or not.

It helps to compare the two means which are taken from the same objects, related units or from same in individual.

According to the question, the answer is true as the paired T-test can be reduced to the single mean T- test.

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Step-by-step explanation:

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Let x represent the regular price of any book in the store. Write an expression that can be used to find the sale price of any b

arsen [322]

Answer:

(a) The sale price of any book in the store is 0.70 x.

(b) The regular price of the book bought by Jerome was $12.80.

Step-by-step explanation:

The complete question is:

All books in a store are being discounted by 30%. Let x represent the regular price of any book in the store. (a) Write an expression that can be used to find the sale price of any book in the store. (b) Jerome bought a book on sale at the store. The sale price of the book was $8.96. Write an equation to determine the regular price of the book Solve your equation to find the regular price of Jerome's book to the nearest cent.

Solution:

The regular price of any book in the store is denoted by, x.

(a)

The discount percentage is: d% = 30%.

The sales price of the book is:

Sales Price = Regular Price - Discount

$SP =x-(x\times 30\%)$

$=x-0.30x\\=0.70x$

Thus, the sale price of any book in the store is 0.70 x.

(b)

The sales price f book bought by Jerome is, SP = $8.96.

Jerome bought the book at the same discount, i.e. 30%.

Compute the regular price of the book bought by Jerome as follows:

$SP =x-(x\times 30\%)$

$8.96=0.70x$

$x=\frac{8.96}{0.70}$

$=12.80$

Thus, the regular price of the book bought by Jerome was $12.80.

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Answer:

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