Meico insurance company offers car insurance contracts by directly contacting potential customers through phone calls. Sales agents malce these phone...
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Meico insurance company offers car insurance contracts by directly contacting potential customers through phone calls. Sales agents malce these phone calls and describe insurance policies. The weekly sales of agents follow an approximately normal distribution with mean of \$15 thousand and standard deviation of \$5 thousand. If lvleico management would like to improve sales agents' incentives by offering a bonus to agents selling more than \$25 thousand weekly, what proportion of sales agents qualify for the bonus? Select one: 0 a. 'lﬁﬁé Db. 5% C} c. 95%

A yogurt producer implements a new quality control system. To meet the company's standards, any product should have a stable protein content. If the standard deviation of the protein content is lower than {1.5 grams perjarl this product is approved. The company hires you to decide whether product X meets the standards. You collect a random sample of 60 jars and measure protein content. 'i'ou ﬁnd the average value is T2 grams perjar and standard deviation equal to [143 grams perjar. What distribution will you use to test whether the product meets the company's standards? Select one: C' a. t distribution with 6!] degrees of freedom O b. 1 distribution with 59 degrees of freedom O :3. x2 distribution with ED degrees of freedom D d. x2 distribution with 59 degrees of freedom C' e. F distribution with 59 and 50 degrees of freedom

Manager of a chicken farm wants to investigate the possibility.' of replacing the current chicken food with a new generation proven to result in heavier chickens. There are hvo brands A and B available and the manager would like to pick the better one before signing a contract with the chicken food seller. Using sample products ofthose brands. 35 new born chickens were fed A (population 'I} and 40 were fed B [population 2} for a month. Sample means and standard deviations of chicken weights after the feeding period are 22.5 lbs and 1.? lbs for brand A and 21.1 lbs and 1.3 lbs for brand El. Brand E is recommended bva consulting companyr but the manager wants to test their claim and seeks to prove that brand A is superior. in.ass,*ra=1-993 ta.ns,73=1-ﬁﬁﬁ in.ass,ss=1-983 in.as,ss=1-ﬁﬁ3 Fo.ass.s4,3s=1-922 Fa.ns.34.3s=1-?23 Fa.ass.ss,34 =1-951 Fa.as,3s.34 =1-749 {Assume population variances are equal} Which category of hypothesis testing is the most appropriate to test the manager's claim? Select one: C' a. t—test for two population differences in means with equal unknown population variances. O b. Single population mean. 0 c. F-test for difference in means. C' d. t—test for matched pairs. 0 e. t—test for two population difference in means with unequal unknown population variances.

University officials claim that 19.6% of U of Lima students smoke. The student senate disagrees however] and insists on a much lower fraction of smoker students. The senate is granted permission to conduct a survey, in an attempt to provide statistical evidence disproving the university ofﬁcials" claim. To perform the test a random sample of 508 students were surveyed of which 91 responded &quot;yes&quot; to &quot;Do you regularly smoke-f&quot;. tu.ozs,?4=1-993l to.os,?4='l-ﬁﬁﬁ. Zu.o25=1-950. Zu.o5=1-545 What is the required sample size for constructing a 90% conﬁdence interval with a width of 0.006 given the a priori idea extracted from the above sample ? Hint 1: use as many decimal places as possible in your calculations. Hint 2: Width is not the same as total length of the intewal. Select one: C) a. 11453 O b. 10316 C! c. 10114 C) d. 11452 G e. 10113

Manager of a chicken farm wants to investigate the possibility.' of replacing the current chicken food with a new generation proven to result in heavier chickens. There are two brands A and B available and the manager would like to pick the better one before signing a contract with the chicken food seller. Using sample products of those brands. 35 newborn chickens were fed A [population 1] and 41.1 were fed B {population 2} for a month. Sample means and standard deviations of chicken weights after the feeding period are 22.5 lbs and 1.? lbs for brand A and 21.1 lbs and 1.3 lbs for brand El. Brand E is recommended by a consulting company but the manager wants to test their claim and seeks to prove that brand A is superior. {Assume population variances are equal] After calculating the appropriate test statisticr what does the analysis suggest regarding the new chicken food brands? to.u25,73=1-993 tu.os,73=1-555 in.uss.ss=1-933 t4:).izis,ss=1-553 Fﬂ.oas,34,as=1-922 Fn.us,34,3s=1-723l Fo.n25,ss,34=1-951 Fu.os.ss,s4=1-749 Select one: C' a. There is enough evidence suggesting brand B is superior. C&quot; b. There is enough evidence suggesting brand A is superior. O c. There is no evidence suggesting a difference. 0 d. There is enough evidence suggesting no difference. C! e. lCandD

Which of the following are characteristics of using matched pairs to analyze the difference in means of two populations? | We can use the z—distritiution instead of the t H Fewer outside inﬂuences are lilcely to impact results &quot;I We onlyr need to collect data for one population Select one: D a. Only | D h. Only II D :3. Both | and Ill 0 CI. I. II and III 0 e. None of the options are behets

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