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Mars2501 [29]
3 years ago
15

The sum of a number and 4

Mathematics
2 answers:
Nina [5.8K]3 years ago
8 0

let p be the number

p+4=

VLD [36.1K]3 years ago
4 0

Let n be the number.

n + 4

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Researchers studying the acquisition of pronunciation often compare measurements made on the recorded speech of adults and child
dolphi86 [110]

Answer:

(A) The additional information that is needed to confirm about the conditions for this test have been met is ‘Population is approximately normal.

(B) The test statistic = 1.9965

(C1) P-value = 0.0556

(C2) There is no significant difference between mean VOT for children and adults.

D1) It is possible to make type II error.

(D2) There should be a difference in the VOT of adults and children.

Step-by-step explanation:

Let na be the number of adults = 20

xa mean VOT for adults = 88.17

sa standard deviatiation of VOT for adults = 24.74

Let nc be the number of children = 10

xc mean VOT for children =60.67

sc standard deviatiation of VOT for children = 39.89

(A) From the information the population variances are unknown and the two sample are assumed to be independent and the sample the sample size are smaller that is (n<30).

This indicates that the additional information that is required for the conditions of the test to be satisfied is 'distribution of the population'. the addition assumption to be made is, that the population distribution is normal.

(b) Calculating the test statistics using the formula;

t = (xa -xc)/SE - d

where SE = standard deviation , d= hypothesized difference = 0

But SE = √sa²/na +sc²/nc

           = √24.74 ²/20 + 39.89²/10

           = √189.72559

           = 13.774

Substituting into test statistics equation, we have

t = (xa -xc)/SE - d

  = (88.17 - 60.67/13.774

  = 1.9965

Therefore the test statistic is 1.9965

(c) Calculating the p-value, we have;

Degree of freedom = na + nc -2

                                 = 10+ 20 -2

                                 = 28

The p-value for t=1.9965 at 28 degrees of freedom and 0.05 level of significance is 0.0556.

The p-value 0.0556 is greater than given level of significance 0.05 hence we fail to reject the null hypothesis and conclude that there is no significant difference between mean VOT for children and adults.

(D1) From the information in part (C) the null hypothesis is not rejected.

Since the null hypothesis is not rejected, there might be a chance that not rejecting null hypothesis would be wrong. In this type of situation the error that can occur would be type II error.

(D2) The type of error describe in the context of this study is obtained by the concept of the type II error which tells that the null hypothesis is not rejected when it is actually false.

7 0
3 years ago
Please help me with this algebra/geometry question!
sp2606 [1]
There is a app called photo mathyou should use it
7 0
3 years ago
Jadon has 4 feet of ribbon to decorate pockets. He needs 1/3 foot of ribbon to decorate each pocket. How many pockets will jadon
jolli1 [7]

Answer:

4 feet of ribbon ÷ 1/3 foot riboon = 12 pockets

5 0
2 years ago
Please help me I am having a hard time understanding this !
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Ududd8rhr8he8 uh egigeigs8heiheoyoueohrdohpduepup0eu0ie0eie
6 0
3 years ago
[WILL GIVE BRAINLY IF CORRECT] While on vacation in Lanberry, Grace went out for a dinner that cost $108.63. If sales tax in Lan
irinina [24]

Answer:

$132.25

Step-by-step explanation:

108.63 * 0.0375 ≈ 4.07

108.63 * 0.18 ≈ 19.55

19.55 + 4.07+ 108.63 = 132.25

Have a good day :)

5 0
2 years ago
Read 2 more answers
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