Please show working if any and answer all questions.

Please take your time.

Q#1: The mean salary for RN &RRT is $90,000. This is an example of a Hypothesis. Ture or false?

Q#2:

a. In an alternative hypothesis, how many options are there?

b. If question signal or mentioned these key word- below / few / less / less than / decrease, which tailed we select?

Q#3: Find the Null and alternative hypothesis for the questions below;

a.College Professors have incomes with a standard deviation that islessthan$21,000.Arecent study of225College Professors income showed a standard deviation of $24,750.

b. The mean IQ score of statistics professors isgreater than128. Sample data shows n=15, sample mean = 110 and sample standard deviation is 15.

c.The mean weight of super model winners is108pounds. A study of25randomly selected super model resulted in a mean winner is less than theweight of115pounds.

Q#4: Standardized measures seem to indicate that the average level of anxiety has increased gradually over the past 50 years (Twenge, 2000). In the 1950s, the average score on the Child Manifest Anxiety Scale was = 14.1. A sample ofn= 15 of today's children produces a mean score ofM= 23.3 with SS= 240.Based on the sample, has there been a significant change in the average level of anxiety since the1950s? Use a two-tailed test with = 0.01.