Solution :
This is the left tailed test,
The null and alternative hypothesis is ,
H0 : = 20
Ha : < 20
a) Test statistic = t =
= ( - ) / s / n
= (18.1 - 20) / 3.9 / 19
Test statistic = t = -2.12
degrees of freedom = n - 1 = 19 - 1 = 18
b) P(t < -2.12)
P-value = 0.0241
correct graph is = A
c) correct option is = D
0.02 < P-value < 0.025
To test Ho: u= 20 versus Hy: u<20, a simple random sample of size n= 19...
To test Ho: u = 20 versus Hy: u<20, a simple random sample of size n= 16 is obtained from a population that is known to be normally distributed. Answer parts (a)-(d). Click here to view the t-Distribution Area in Right Tail. (a) If x = 18.1 and s = 4.1, compute the test statistic. t (Round to two decimal places as needed.) (b) Draw a t-distribution with the area that represents the P-value shaded. Which of the following graphs...
To test Ho: u = 105 versus Hy: # 105 a simple random sample of size n= 35 is obtained. Complete parts a through e below. Click here to view the t-Distribution Area in Right Tail. (a) Does the population have to be normally distributed to test this hypothesis? Why? O A. No, because the test two-tailed OB. Yes, because n 2 30. OC. No, because n 2 30. OD. Yes, because the sample random (b) If x= 101.9 and...
To test u = 20 versus H(1) u is less than 20 a simple random sample of size = 19 is obtained from a population that is known to be normally distributed answer parts (a) - (d) (a) If x bar = 18.4 and s =4.2 compute the test statistic. (b) Draw a t-distribution with the area that represents the P-value shaded. (c) Approximate the P-Value: Choices: 0.15 is less than P-value less than 0.20; 0.20 less than P-value less...
To test Ho: u 60 versus Hy: H <60, a random sample of size n 24 is obtained from a population that is known to be normally distributed. Complete parts (a) through (d) below. 囲Click here to view the t-Distribution Area in Right Tail. (a) If x 56.4 and s 12.4, compute the test statistic h" □ (Round to three decimal places as needed.)
To test Ho: p= 100 versus Hy: p + 100, a simple random sample size of n = 19 is obtained from a population that is known to be normally distributed. Answer parts (a)-(d). Click here to view the t-Distribution Area in Right Tail. (a) If x = 105.4 and s = 9.7, compute the test statistic. t= (Round to three decimal places as needed.) (b) If the researcher decides to test this hypothesis at the a= 0.01 level of...
To test Ho: p= 100 versus Hy: p* 100, a simple random sample size of n = 20 is obtained from a population that is known to be normally distributed. Answer parts (a)-(d). Click here to view the t-Distribution Area in Right Tail. (a) If x = 105.4 and s= 9.1, compute the test statistic. (Round to three decimal places as needed.) ta (b) If the researcher decides to test this hypothesis at the a=0.01 level of significance, determine the...
a through d please To test Ho = 50 versus Hy < 50, a random sample of size n=23 is obtained from a population that is known to be normally distributed. Complete parts (a) through (d) below. Click here to view the t-Distribution Area in Right Tail (a) If x = 46 4 and s= 12.9, compute the test statistic. to-(Round to three decimal places as needed) (b) If the researcher decides to test this hypothesis at the a=0.05 level...
10.) to test Ho: u=35 versus H1: u unequal to 36, a simple random sample size of n=35 is obtained. complete parts a through f To test H 36 versus Hy736, a simple random sample of size 35 is obtained. Complete parts (a) through in below. Click the loon to view the table of critical values (a) Does the population have to be normally distributed to test this hypothesis by using diatribution methode? Why? O A No--there are no constraints...
To test Ho : ?= 20 versus H1 : ?< 20, a simple random sample of size n = 17 is obtained from a population that is known to be normally distributed Answer parts (a)-(d) E Click here to view the t-Distribution Area in Right Tail (a) If x 18.3 and s 3.8, compute the test statistic. t-(Round to two decimal places as needed.)
To test Hy = 35 versus H, #35 a simple random sample of size 40 is obtained Complete parts achow Click the icon to view the table of critical t-values (a) Does the population have to be normally distributed to test this hypothesis by using distribution methods? Why? O A No-there are no constraints in order to perform a hypothesis test OB Yes-since the sample size is at not least 50, the underlying population does not need to be normally...