The sample mean and standard deviation from a random sample of 32 observations from a normal population were computed as x¯=26 and s=9. test whether there is enough evidence to infer at the 10% significance level that the population mean is greater than 23. find the critical region. (e. g. t > 1 for a one-tailed test, or t < -1 or t > 1 for a two-tailed test.)

There is enough evidence to infer at the 10% significance level that the population mean is greater than 23

Step-by-step explanation:

Given that the sample mean is 26 and sample std dev = 9

i.e

(Right tailed test at 10% significance level)

Mean diff = 3

Test statistic t =

Critical region is t>1.310

df 31

p value = 0.034

Since p <0.10 reject null hypothesis

There is enough evidence to infer at the 10% significance level that the population mean is greater than 23

Critical region is in the enclosed file

Ab=dc ac=de ad=bce i hope this !

Answer to your question: a. the fundamental theorem of algebra tells you that the equation will have two complex roots since the degree of the polynomial is 2. the roots are ​ x=1±i7√2 .number of roots=degree of polynomialhere, degree of polynomial is 2 so number of roots will be 2.hope it *_*