2023 QUESTION 3 Identify which of these types of sampling is used random stratified systematic cluster convenience 49 34 | Assignments Online

QUESTION 3

Identify which of these types of sampling is used: random, stratified, systematic, cluster, convenience.

49, 34, and 48 students are selected from the Sophomore, Junior, and Senior classes with 496, 348, and 481 students respectively.

Random

Cluster

Systematic

Stratified

Convenience

5 pointsQUESTION 4

Identify the type of observational study (cross-sectional, retrospective, prospective).

A town obtains current employment data by polling 10,000 of its citizens this month.

Cross-sectional

Prospective

Retrospective

None of these

QUESTION 9

Find the mean for the given sample data. Unless indicated otherwise, round your answer to one more decimal place than is present in the original data values.

The local Tupperware dealers earned these commissions last month:

$1077.28, $2661.13, $4642.11, $4264.15, $1019.55, $3444.20, $2525.92, $3740.26, $3533.07, $1633.84

What was the mean commission earned? Round your answer to the nearest cent.

$3,171.28 

$2,848.15 

$3,567.69 

$2,854.15 

5 pointsQUESTION 10

Find the median for the given sample data.

The distances (in miles) driven in the past week by each of a company’s sales representatives are listed below.

107, 114, 214, 230, 436, 445

Find the median distance driven.

222 mi

220.50 mi

230 mi

214 mi

5 pointsQUESTION 11

Find the midrange for the given sample data.

The speeds (in mph) of the cars passing a certain checkpoint are measured by radar. The results are shown below. Find the midrange.

44.3, 41.4, 42.4, 40.7, 43.1, 40.3, 44.5, 41.4, 44.3, 42.1 43.4 41.4 40.7 43.4 41.4

4.20 mph

42.30 mph

42.1 mph

42.40 mph

5 pointsQUESTION 12

Solve the problem.

A student earned grades of C, A, B, and A. Those courses had these corresponding numbers of credit hours: 4, 5, 1, and 5. The grading system assigns quality points to letter grades as follows: A=4, B=3, C=2, D=1, and F=0. Compute the grade point average (GPA) and round the result to two decimal places.

8.75

2.18

3.5

3.4

QUESTION 13

Find the range for the given sample data.

The manager of an electrical supply store measured the diameters of the rolls of wire in the inventory. The diameters of the rolls (in meters) are listed below.

0.177, 0.115, 0.542, 0.413, 0.618, 0.315

0.503 m

0.138 m

0.115 m

0.542 m

5 pointsQUESTION 14

Find the variance for the given data. Round your answer to one more decimal place than the original data.

The weights (in ounces) of 10 cookies are shown.

1.47, 0.56, 0.58, 0.86, 1.21, 1, 1.46, 1.44, 0.88, 0.53

0.118 oz^2

0.144 oz^2

0.13 oz^2

0.108 oz^2

5 pointsQUESTION 15

Find the standard deviation for the given sample data. Round your answer to one more decimal place than is present in the original data.

Listed below are the amounts of time (in months) that the employees of a restaurant have been working at the restaurant.

2, 3, 5, 13, 22, 35, 60, 86, 101, 122

43.3 months

42.2 months

45.8 months

44.5 months

5 pointsQUESTION 16

Use the empirical rule to solve the problem.

At one college, GPA’s are normally distributed with a mean of 2.9 and a standard deviation of 0.6. What percentage of students at the college have a GPA between 2.3 and 3.5?

99.70%

84.13%

68%

95%QUESTION 17

Solve the problem. Round results to the nearest hundredth.

The mean of a set of data is -3.82 and its standard deviation is 2.31. Find the z score for a value of 3.99.

3.04

3.72

3.68

3.38

5 pointsQUESTION 18

Find the percentile for the data value.

Data set: 122, 134, 126, 120, 128, 130, 120, 118, 125, 122, 126, 136, 118, 122, 124, 119

data value: 128

75

85

62

70QUESTION 19

Find the indicated measure.

The weights (in pounds) of 30 newborn babies are listed below. Find Q1.

5.5, 5.7, 5.8, 6.0, 6.1, 6.1, 6.3, 6.4, 6.5, 6.6, 6.7, 6.7, 6.7, 6.9, 7.0, 7.0, 7.0, 7.1, 7.2, 7.2, 7.4, 7.5, 7.7, 7.7, 7.8, 8.0, 8.1, 8.1, 8.3, 8.7

7.5 lb

6.4 lb

5.8 lb

6.3 lbQUESTION 20

Find the indicated measure.

The test scores of 32 students are listed below. Find P46.

32, 37, 41, 44, 46, 48, 53, 55, 56, 57, 59, 63, 65, 66, 68, 69, 70, 71, 74, 74, 75, 77, 78, 79, 80, 82, 83, 86, 89, 92, 95, 99

14.72

67

68

15

fraction 7/11 question – 0.636, 63.6%