Please help me clarify/ Identify the missing value using the given on each item. Assume that population variances are equal and unknown.

15. CL=90%, n1=12, n2=19, t=_______ (choices: 1.701, 1.696, 1.699, 1.697) 16. n1=6, t=1.350, CL=_______%, n2=_______ (Choose your answer for CL using the options below, while for n2, refer to choices in item #17) (choices: 80, 90, 95, 98) 17. n1=6, t=1.350, CL=_______%, n2=_______ (Choose your answer for n2 using the choices below) (choices: 7, 5, 6, 9) 18. CL=98%, n1=6, df=18, n2=_______, t=_______ (Choose your answer for n2 using the options below, while for t, refer to choices in item #19) (choices: 16, 14, 12, 18)

19. CL=98%, n1=6, df=18, n2=_______, t=_______ (Choose your answer for t using the choices below) (choices: 1.734, 2.101, 2.552, 2.878)

SOLVI NG Find a condence interval for the mean/difference of the means of the entire population assuming that ee population variance/s is/are unknown .21) The following are randomly selected age of twelve SHS teachers in SSAM. 33 24 28 45 25 42 23 28 25 23 24 48 Find a 90% condence interval for the average age of SHS teachers, assuming that the teacher's age is approximately normally distributed. (Read the problem carefully. Refer to items 21-27 for the questiom regarding this problem.) 2'1 Using the dataset in the problem, what is the value of the sample mean? " (1 Point) O 33.45 C) 30.67 0 29.91 0 None of the choices above What is the value of the sample variance? ' II} (1 Point) 0 92.5118 0 94.0606 0 77.0556 0 90.1194 1 a What is the value of the sample standard deviation? " (1 Point) 0 8.7781 0 9.1595 0 9.4931 0 9.6183 {3 fl What is the t-critical value? * [Q (1 Point) O 1.796 O 1.812 O 1.782 O 1.833 1" I What is the value of the lower condence limit (LCL)? * (1 Point) O 26.12 O 25.95 0 25.92 0 None of the choices above What is the value of the upper condence limit (UCL)? * (1 Point) O 35.22 C) 35.39 0 35.40 0 35.42 Interpretation * (1 Point) O The researcher is 90% condent that the average age of SHS teachers in SSAM is between 26.12 years old and 35.22 years old assuming that the population variance is unknown. 0 The researcher is 90% condent that the average age of SHS teachers in SSAM is between 25.92 years old and 35.42 years old assuming that the population variance is unknown. 0 The researcher is 90% condent that the average age of SHS teachers in SSAM is between 25.95 years old and 35.39 years old assuming that the population variance is unknown. 0 None of the choices above