The mean amount purchased by a typical customer at Churchill’s Grocery Store is $23.50, with a standard deviation of$5.00. Assume the distribution of amounts purchased follows the normal distribution. For a sample of 50 customers, answer the following questions. a. What is the likelihood the sample mean is at least $25.00? b. What is the likelihood the sample mean is greater than$22.50 but less than $25.00? c. Within what limits will 90 percent of the sample means occur?

Verified answer

psychology

Explain the use of imaginal versions of systematic desensitization versus flooding to treat a student's exam anxiety. Differentiate them in terms of the underlying process by which each type of treatment is presumed to produce its effect.

Verified answer

finance

When returns from a project can be assumed to be normally distributed, such as those shown in the Figure (represented by a symmetrical, bell-shaped curve), the areas under the curve can be determined from statistical tables based on standard deviations. For example, $68.26$ percent of the distribution will fall within one standard deviation of the expected value $(\bar{D} \pm 1 \sigma)$ . Similarly, $95.44$ percent will fall within two standard deviations $(\bar{D} \pm 2 \sigma)$ , and so on. An abbreviated table of areas under the normal curve is shown next. Assume Project A has an expected value of $\$ 24,000$ and a standard deviation ( $\sigma$ ) of $\$ 4,800$ . What is the probability that the outcome will be at least $\$ 14,400$ ?

Number of $\sigma$ 's from Expected Value	+ or -	+ and -
$0.5$	$0.1915$	$0.3830$
$1.0$	$0.3413$	$0.6826$
$1.5$	$0.4332$	$0.8664$
$1.65$	$0.4505$	$0.9010$
$2.0$	$0.4772$	$0.9544$

Verified answer

accounting

Compute the cash proceeds from bond issues under the following term. Indicate whether the bonds sold at a premium or discount:

Hett, Inc., issued $400,000 of 8-year, 8 percent bonds at 101.

Verified answer

1/2