Question

A hypothesis test is conducted to test the null hypothesis that the mean is less than 12. Use a 0.01 level of significance.

What type of test is this?

• Right tail
• Two tail
• Left tail

What is the critical value?

• 2.33
• -2.33
• 1.78
• correct answer is not given

Suppose the test statistic was -2.50 What is the conclusion?

• Fail to reject Ho. There is not sufficent evidence to support the claim that the mean is less than 12.
• Reject Ho. There is not sufficent evidence to support the claim that the mean is less than 12.
• Reject Ho. There is sufficent evidence to support the claim that the mean is less than 12.
• Fail to reject Ho. There is sufficent evidence to support the claim that the mean is less than 12.

The      is the probability of getting a test statistic at least as extreme as the one representing the sample data, assuming that the null hypothesis is true.

• level of signifcance
• sample mean
• p value
• critical value

Answer 1

A hypothesis test is conducted to test the null hypothesis that the mean is less than 12. Use a 0.01 level of significance.

What type of test is this?

Left Tail

What is the critical value?

-2.33

Suppose the test statistic was -2.50 What is the conclusion?

Reject Ho. There is sufficent evidence to support the claim that the mean is less than 12.

The      is the probability of getting a test statistic at least as extreme as the one representing the sample data, assuming that the null hypothesis is true.

p value

Answer 2

The 24 consonant sounds comprise six stops (plosives): p, b, t, d, k, g; the fricatives f, v, θ (as in thin), ð [eth] (as in then), s, z, ∫ [esh] (as in ship), Ʒ (as in pleasure), and h; two affricatives: t∫ (as in church) and dƷ (as the j in jam); the nasals m, n, ŋ (the sound that occurs at the end of words such as young); the lateral l; the postalveolar or retroflex r; and the semivowels j (often spelled y) and w. These remain fairly stable, but Inland Northern American differs from RP in two respects: (1) r following vowels is preserved in words such as door, flower, and harmony, whereas it is lost in RP; (2) t between vowels is voiced, so that metal and matter sound very much like British medal and madder, although the pronunciation of this t is softer and less aspirated, or breathy, than the d of British English.